TSD BUR Restoration Manual.pdf

WeatherTech Consulting Group BUR Restoration Manual

WT

WeatherTech Restoration Manual BUR Roof Restoration Projects

TABLE OF CONTENTS BUILT- UP ROOF MEMBRANES

BUR 1 Roof Membrane Patch Procedure

BUR 2 Holes, Tears or Abrasion

BUR 3 Fishmouths and Buckles/Wrinkles

BUR 4 Surface Coating Deterioration

BUR 5 Membrane Deterioration

BUR 6 Dry Side Laps

BUR 7 Blisters

BUR 8 Debris, Vegetation and Other Contaminants

BUR 9 Inadequate Equipment Supports

BUR 10 Ponding Water

BUR 11 Alligatoring or Eroding of Surface

BUR 12 Crazing or Eroding of Mineral Surfaced Cap Sheets

BUR 13 Splits

BUR 14 Slippage Repair

BUR 15 Bare Spots on Aggregate Surfaced Roofs

BUR 16 Fastener Back-out

BUR 17 Loose or Displaced Wall and Base Flashings

BUR 18 Open Side Laps and Open Lap of Base Flashing onto Field Membrane

BUR 19 Weather-Cracked or Deteriorated Flashings

BUR 20 Exposed Gaps at the Top of Base Flashing

BUR 21 Loose Mechanical Attachment of Base Flashings

BUR 22 Metal Cap Flashing/Coping

BUR 23 Metal Counterflashing

BUR 24 Metal Edge Flashing - Drip Edge or Gravel Stop

BUR 25 Penetrations - Loose or Unbonded Membrane Flashing

BUR 26 Pitch Pans

BUR 27 Interior Drains

BUR 28 Scuppers

BUR 29 Expansion Joint Covers

BUR 30 Interior Gutters

BUR 1 - BUR General Membrane Patch Procedure

The following repair is utilized in several different repair situations which require installing a patch to return the membrane to a watertight condition.

1. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof membrane.

2. If the membrane surface has been flood coated and aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

3. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and issued to enhance adhesion;

however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

4. Where plies are removed from the membrane, install the same number of plies (a minimum of 2 plies) in hot bitumen or cold applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT.

5. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing.

Liquid applied coatings should be installed per the manufacturer's instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

BUR 1

CUTOUT DEFECT AREA

AROUND

EXISTING BUR

SYSTEM

GENERAL DEFECTS

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR General Patch Misc Defects

SCALE: N.T.S.

WeatherTech © Date: Rev 10/15

BUR 2 - Holes, Tears or Abrasion

1. Inspect for water that may have leaked into the roof system. Check for debris; remove if present.

2. If water infiltration is suspected, open the membrane and inspect the insulation and deck for damage.

Remove wet or damaged insulation and repair or replace the deck as required. Properly attach or adhere new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

3. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof

4. If the membrane surface has been flood coated and aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

5. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

6. Install the same number of plies as were damaged or removed (a minimum of 2 plies) in hot bitumen or cold applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT. As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and

7. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. Liquid applied coatings should be installed per the manufacturer's instructions. Which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

BUR 2

CUTOUT AREA

AROUND DEFECT

EXISTING BUR

SYSTEM

HOLES, TEARS, ABRASIONS

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR HOLES, TEARS, ABRASIONS

SCALE: N.T.S.

BUR 3 - Fishmouths and Buckles/Wrinkles

1. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it in the existing roof membrane.

aggregate embedded, carefully spud the aggregate free from the surface and weep clean.

3. Carefully cut the ridge, wrinkle or fishmouth with a sharp utility knife, remove debris (if any) and inspect for water infiltration.

4. If water infiltration is suspected, inspect the Insulation and deck for damage. Remove wet or damaged insulation and repair or replace the deck as required.

Properly attach new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

5. Remove the buckle, wrinkle or fishmouth to an adhered area.

6. Prime the surface of the membrane (asphalt BUR only) solvents and is used to enhance adhesion; however,

7. Install the same number of plies as were removed (a minimum of 2 plies) in hot bitumen or cold-applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT. As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at

EVT.

8. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. Liquid applied coatings should be installed per the manufacturer's instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

BUR 3

AROUND REPAIR

EXISTING BUR

SYSTEM

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR FISHMOUTHS, BUCKLE, RIDGE REPAIR

SCALE: N.T.S.

Date: Rev 1/09

BUR 4 - Surface Coating Deterioration

1. Thoroughly remove debris, dirt and unbonded coating from the roof surface, taking care to not damage the membrane. If water is used to prepare the surface, allow the membrane to dry.

2. Prime the surface of the membrane (asphalt BUR only) with asphalt primer if required and allow to dry. Primer contains solvents and is used to enhance adhesion;

however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

3. Apply additional coating that is compatible with any existing adhered coating and the membrane material.

BUR 5 - Membrane Deterioration

1. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof membrane.

from the surface and sweep clean.

3. Inspect the membrane for possible moisture infiltration.

4. If water infiltration is suspected, cut open the membrane and inspect the insulation and deck for damage. Remove wet or damaged insulation and repair or replace as required.

Properly attach new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

5. Cut out and remove deteriorated membrane.

6. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

7. Install the same number of plies as were removed (a minimum of 2 plies) in hot bitumen or cold-applied adhesive.

Extend the bottom ply at least 6 inches (152 mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT. As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT.

8. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. Liquid applied coatings should be installed per the manufacturer's instructions, which may include a waiting period. For small repair areas, it is a common practice to apply some coating immediately after the membrane repair is made.

BUR 5

AROUND DEFECT

EXISTING BUR

SYSTEM

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR MEMBRANE DETERIORATION

SCALE: N.T.S.

BUR 6 - Dry Side Laps begin by preparing the surface. Cut away unbonded felts and remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof membrane.

3. Prime the surface of the membrane (asphalt BUR only) solvents and is used to enhance adhesion; however,

4. Where plies are removed from the membrane, install the same number of plies (a minimum of 2 plies) in hot bitumen or cold applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using both bitumen as the method of application, take care to maintain the bitumen at EVT.

As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT.

5. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. Liquid applied coatings should be installed per the manufacturer's instructions, which may include a waiting period. For small repair areas, it is a common practice to apply the coating immediately after the membrane repair is made.

DRY SIDE LAPS

SCALE: N.T.S. BUR 6

BUR 7 - Blisters

The decision whether to cut out and remove, patch over to reinforce or imply monitor blisters is a judgement call. In general, blisters that are keeping air in will keep water out and unless the blisters have certain characteristics, it may be preferable to leave them undisturbed. Some characteristics that may determine the need to repair blisters are:

* Excessive loss of gravel or other surfacing

* Membrane deterioration

* Blisters in laps which have reduced lap coverage

* Blisters that have breaks

* Blisters that have fatigue cracking

* Blisters that occur in areas of high traffic

Should it be determined that blister removal is necessary, the following steps should be used.

1. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof membrane.

3. Carefully cut and remove the blistered material until good adhesion of the membrane is reached.

4. If water infiltration is suspected, inspect the insulation and deck for damage. Remove wet or damaged insulation and repair or replace as required. Properly attach or adhere new, dry insulation consistent with thickness of the existing insulation and compatible with

5. Prime the surface of the membrane (asphalt BUR only) solvents and is used to enhance adhesion; however,

6. Install the same number of plies as were removed (a minimum of 2 plies) in hot bitumen or cold-applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT. As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and

7. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or coatings should be installed per the manufacturer's Instructions, which may

BUR 7

AROUND DEFECT

EXISTING BUR

SYSTEM

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR ROOF BLISTER

SCALE: N.T.S.

BUR 8 - Debris, Vegetation and Other Contaminants

1. Determine the source of the debris, vegetation or contamination (e.g., grease, oils or chemicals). Eliminate the source of contamination if possible.

2. Sweep to remove the debris. If the contamination cannot be removed by sweeping, it may be necessary to scrub the surface or use other methods to remove the contamination.

3. If the membrane is degraded then inspect the membrane and locate the degraded area to be repaired.

4. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove the aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch.

5. If the membrane surface has been flood coated and

6. Cut out and remove degraded membrane.

7. Prime the surface of the membrane (asphalt BUR only) solvents and is used to enhance adhesion; however,

8. Install the same number of plies as were removed (a minimum of 2 plies) in hot bitumen or cold-applied adhesive. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT.

As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT.

BUR 9 -Inadequate Equipment Supports

If inadequate equipment supports are damaging the membrane due to the weight/load on the membrane, two options for correcting the condition should be considered which provide an alternate method of support and may prevent additional damage.

1. Erect a new curb attached to the structural deck that can be properly flashed and counter flashed. (See NRCA Construction Detail BUR II in The NRCA Roofing and Waterproofing Manual.)

2. Install an equipment support stand supported by the structure. (See NRCA Construction Detail BUR 12 and BUR 13 in The NRCA Roofing and Waterproofing Manual.) Ensure that the equipment support stand has been properly flashed.

BUR 9EQUIPMENT SUPPORT STAND

SCALE: N.T.S.

BUR 10 - Ponding Water

Ponding water is defined as water that remains standing on the roof surface 48 hours after a rainfall. Where ponded water conditions exist, and all drains have been checked and determined to be free flowing, a thorough assessment of the roof assembly (i.e., deck, installation and membrane) may be required to determine the best solution to eliminate the ponding.

Possible remedies include adding:

* Drains, in low areas

* Sumped, through-wall scuppers

* Tapered insulation and/or crickets

If the ponding condition cannot be eliminated, perform more frequent inspections to monitor and maintain the membrane surface affected by the ponding condition. Implement permanent solutions at the time of reroofing.

BUR 11 - Alligatoring or Eroding of Surface

For moderate alligatoring or small cracks in the surface:

1. Sweep the surface of the membrane free of dirt and dust.

2. Prime the surface of the membrane with asphalt primer if required and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

3. Apply a surface coating compatible with the existing surfacing.

BUR 12 - Crazing or Eroding of Mineral Surfaced Cap Sheets

Crazing or eroding of mineral surfaced cap sheets (not including modified bituminous cap sheets) is beyond the scope of this document. For modified bitumen cap sheets, see the appropriate modified bitumen repair.

BUR 13 - Splits

The following procedure does not address the cause of the split and repairs which address causes (such as structural movement or other forces placed on the membrane) are beyond the scope of this document.

contaminants, aggregate or loose surfacing from the surface of the membrane or flashing be repaired. The area to be prepared should extend a minimum of 24 inches (609mrn) on each side of the split and 36 inches (914mm) beyond the end of the split to provide an ample clean work area on which to install the patch and tie it into the existing membrane.

aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

3. Cut out loose felt from the split area.

4. Inspect for water that may have leaked into the roof system.

Check for debris; remove if present.

5. If water infiltration is suspected, open the membrane and damaged insulation and repair or replace the deck as required. Properly attach or adhere new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

6. At each end of the split, extend the split approximately 12 inches (305mm) further in length by cutting through the

7. At the new end of the split, make a T-cut (a cut perpendicular to the split) approximately 6-8 inches (52-203 mm) long.

Repeat at the other end of the split.

8. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

9. After the primer has dried, cut a piece of granular surfaced sheet approximately 9 inches (229mm) wide and of sufficient length to cover the split from end to end. Center the sheet of material over the split, granule surface down, to serve as a slip sheet.

10. Install the same number of plies that are in the original roof in hot bitumen or cold-applied adhesive.

Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT. As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT When using torch application, take care to not overheat the slip sheet and adhere it to the substrate.

11. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or coatings should be installed per the manufacturer's instructions, which may

BUR 13

T-CUT

EXISTING BUR

SYSTEM

SPLIT

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

T-CUT

12" EXTENSION CUT

BUR SPLIT REPAIR

SCALE: N.T.S.

BUR 14 - Slippage Repair

Slippage repair of field membrane is beyond the scope of this document.

SLIPPAGE REPAIR

SCALE: N.T.S. BUR 14

AROUND REPAIR

EXISTING BUR

SYSTEM

NOTE: WHEN USING GLASS PLY SHEETS INSTALL SAME NUMBER OF PLIES

AS ORGINAL BUR EXTENDING EACH SUCCESSIVE PLY 3 INCHES

BEYOND THE PREVIOUS. REAPPLY SURFACING

BUR 15 - Bare Spots on Aggregate Surfaced Roofs

A bare spot is an area without aggregate in the surface flood coat, with no other defect in the area of the bare spot. To repair:

1. Clean the area to receive new aggregate.

with asphalt primer and allow to dry (coal tar roofs typically do not require priming.) If roof cement is used, priming is not typically required. Allow the primer to dry.

3. Apply a generous application of hot bitumen or roof cement to the primed area and embed aggregate.

BARE SPOTS ON AGGREGATE SURFACED ROOFS

SCALE: N.T.S. BUR 15

BUR 16 - Fastener Back-out

1. lf only a few fasteners have backed out through the membrane, evaluate the roof system to assess whether or not other back-outs are likely. If a large number of fasteners have backed out or are starting to back-out, reroofing, rather than repair should be considered.

2. To promote thorough adhesion of a patch, it is essential to contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing roof membrane.

3. If the membrane surface has been flood coated and aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

4. Remove the fastener and loose felt.

5. If water infiltration is suspected, open the membrane and damaged insulation and repair or replace the deck as required. Properly attach new, dry insulation consistent with the thickness of the existing insulation and compatible with

6. lnstall a new fastener and plate through the membrane, with a fastener of adequate length to secure the roofing system to the deck. Locate the fastener about 3 inches (76mm) from the old fastener.

7. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

8. Install the same number of plies that are in the original roof in hot bitumen, cold-applied adhesive or roof cement. Extend the bottom ply at least 6 inches (152mm) beyond the area to be repaired and each succeeding ply at least 3 inches (76mm) beyond the previous ply. When using hot bitumen as the method of application, take care to maintain the bitumen at EVT.

As an alternative, on asphalt BUR membranes only, 2 plies of smooth surfaced modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and

9. Reapply the surfacing. Either embed aggregate in hot bitumen or roof cement or apply a surface cooling compatible with the existing surfacing. Liquid applied coatings should be installed per the manufacturer's instructions, which may include a waiting period. For small repair areas, it is a common procedure to apply the coating immediately after the membrane repair is made.-

FASTENER BACK-OUT

SCALE: N.T.S. BUR 16

BUR 17 - Loose or Displaced Wall and Base Flashings

1. Cut out flashing materials that are loose, wrinkled or displaced until reaching adhered material.

2. Inspect the flashing for possible moisture infiltration.

3. If water infiltration is suspected, open the membrane and inspect the insulation and deck for damage. Remove wet or damaged insulation and repair or replace the deck as required. Properly attach or adhere new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

4. To promote thorough adhesion of a patch, it is essential to begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend 3 minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing membrane and flashing material.

5. If the membrane surface has been flood coated and aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

6. Prime the surface of the membrane (asphalt BUR only) with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion;

however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

7. Install the same type and number of plies of flashing (a minimum of 2 plies) that were removed from the original base flashing in hot asphalt or vertical (flashing) grade roof cement. Extend the first ply at least 6 inches (152 mm) beyond the area to be repaired and each successive ply at least 3 inches (76mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive. Whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application. Use Type III or IV asphalt and take care to maintain the asphalt at EVT.

8. Refasten the top of the base flashing to the wall or curb. Fastener spacing should be 6 inches (152mm) on center maximum or in accordance with the manufacturer's recommendations. Termination bar and fasteners may also be used to secure the top of the base flashing.

9. Seal the fasteners and the top of the base flashing with a layer of vertical grade roof cement and embed one ply of fabric. Top coat with a second layer of vertical grade roof cement.

10. Recoat the base flashing with a coating compatible with the existing, if any.

Regravel any areas where spudding occurred, taking care to cover all exposed felts.

11. Add counterflashing as required for a permanent repair.

BUR 17

TOOLED POLYURETHANE SEALANT

SHEET METAL REGLET

FASTENERS APPROX. 24" O.C.

3" LAP WITH BEAD OF SEALANT

3" LAP AT JOINTS

OPTIONAL: 2" WIDE

CLIP APPROX. 30" O.C.

REMOVABLE SHEET METAL

COUNTERFLASHING 24 GA. GALV.

SEAL TOP OF FLASHINGS WITH

A 3-COURSE OF VERTICAL

GRADE ROOF CEMENT AND

REINFORCEMENT FABRIC

FASTENERS APPROX. 8" O.C.

PRIME MASONRY

GLASS BASE SHEET/GRANULATED

SBS MODIFIED BITUMEN MEMBRANE

STRIPPING PLIES SET IN FLASHING

CEMENT

MULTIPLE-PLY MODIFIED

BITUMEN ROOF MEMBRANE

COVERBOARD INSULATION

THERMAL INSULATION

ROOF DECK

LOOSE BASE FLASHING WALLS

SCALE: N.T.S.

WeatherTech © Date: Rev 10/15

REMOVE ANY COUNTER FLASHING TO ACCESS BASING AND REMOVE ALL LOOSE BASE

FLASHING.

BUR 18 - Open Side Laps and Open Lap of Base Flashing onto Field Membrane

Generally, flashing problems encountered at the lap are of two types:

*Open side laps *Open lap of base flashing onto field membrane

The repair procedure is the same for these two types of defects.

1. Carefully cut out the void or open lap with a sharp utility knife until reaching adhered material. Remove any debris from the area.

3. If water infiltration is suspected, open the membrane and damaged insulation and repair or replace the deck as required. Properly attach or adhere new, dry insulation consistent with the thickness of the existing insulation and compatible with the other roof system components.

contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to Install the patch and tie it into the existing membrane and flashing material.

5. If the membrane surface has been flood coated and asphalt primer and allow to dry. Primer contains solvents and IS used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

7. Install the same type and number of plies of flashing (a minimum of 2 plies) that were removed from the original base flashing in hot asphalt or vertical (flashing) grade roof cement. Extend the first ply at least 6 inches (152mm) beyond the area to be repaired and each successive ply at least 3 inches (76mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of

8. For open side laps, fasten the top of the new flashing material to the wall or curb. Fastener spacing should be 6 inches (152mm) on center maximum or in accordance with the manufacturer's recommendations. Termination bar and fasteners may also be used to secure the top of the base flashing.

9. Seal the fasteners and the top of the base flashing with a layer of vertical grade roof cement and embed one ply of fabric. Top coat with a second layer of vertical grade roof cement.

10. Recoat the base flashing with a coating compatible with the existing, if any.

Regravel any areas where spudding occurred, taking care to cover all exposed felts.

BUR 18OPEN LAP IN BASE FLASHING

SCALE: N.T.S.

BUR 19 - Weather-Cracked or Deteriorated

1. Sweep the surface of the flashing free of dirt, dust and loose granules.

solvents and is used to enhance adhesion; however,

3. Apply a surface coating compatible with the existing surfacing.

4. Optional: Install reflective coating after 30 days.

5. Where the base flashings are excessively deteriorated, install a layer of like material over the deteriorated membrane if the existing base flashing will allow solid attachment. If the additional layer cannot be installed, replace the existing base flashing with a new flashing.

BUR 20 - Exposed Gaps at the Top of Base

1. Cut out the flashing material that is loose. Remove debris from the area.

3. If water infiltration is suspected, cut open the flashing and inspect the underlying interplies and substrate. Replace any wet or damaged materials.

begin by preparing the surface. Remove debris, contaminants, aggregate or loose surfacing from the surface of the membrane or flashing to be repaired. The area to be prepared should extend a minimum of 18 inches (457mm) beyond the perimeter of the defect to provide an ample clean work area on which to install the patch and tie it into the existing membrane and flashing material.

5. If flashing removal is necessary and if the membrane surface has been flood coated and aggregate embedded, carefully spud the aggregate free from the surface and sweep clean.

asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane and inhibit adhesion of newly applied material.

7. Install the same type and number of plies of flashing (a minimum of 2 plies) that were removed from the original base flashing in hot asphalt or vertical (flashing) grade roof cement.

Extend the first ply at least 6 inches (152mm) beyond the area to be repaired and each successive ply at least 3 inches (76mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at EVT.

8. Refasten the top of the base flashing to the wall or curb.

Fastener spacing should be 6 inches (152mm) on center maximum or in accordance with the manufacturer's recommendations. Termination bar and fasteners may also be used to secure the top of the base flashing.

9. Seal the fasteners and the top of the base flashing with a layer of vertical grade roof cement and embed one ply of fabric. Top coat with a second layer of vertical grade roof cement.

10. Recoat the base flashing with a coating compatible with the existing, if any. Regravel any areas where spudding occurred, taking care to cover all exposed felts.

11. Add counterflashing as required for a permanent repair.

EXPOSED GAPS AT THE TOP OF BASE FLASHINGS

SCALE: N.T.S. BUR 20

BUR 21 - Loose Mechanical Attachment of Base Flashings

1. Remove loose fasteners.

2. Re-secure base flashings using fasteners of sufficient length and either of a larger diameter or fastened to an adjacent location (new hole).

3. Seal the fasteners and the top of the base flashing with a layer of vertical (flashing) grade roof cement and embed one ply of fabric. Top coat with a second layer of vertical (flashing) grade roof cement.

4. Add counterflashing as required for a permanent repair.

LOOSE MECHANICAL ATTACHMENT OF BASE FLASHINGS

SCALE: N.T.S. BUR 21

BUR 22 - Metal Cap Flashing/Coping

For localized leaks:

1. Replace damaged, missing or severely corroded sections or joint covers.

2. Refasten loose cleats/clips and any unsecured sections of metal using fasteners or sufficient length and either of a larger diameter or fastened to an adjacent location (new hole).

3. Clean and reseal open joints with gun-grade polyurethane sealant.

BUR 23 - Metal Counterflashing

1. Replace damaged, missing or severely corroded sections or sections where holes have developed through the metal.

2. Remove corrosion from metal by wire brushing and painting with a corrosion resistant paint.

3. Reposition and refasten loose metal sections using fasteners of sufficient length and either of a larger diameter or fastened to an adjacent location (new hole).

4. Remove cracked or damaged sealant. Clean caulking clips and reseal with gun-grade suitable sealant. Tool the sealant into the caulking clip using moderate pressure to fill the entire space and ensure adhesion to both surfaces.

Caution: Do not seal weep holes or the top of exposed through wall flashing.

BUR 24 - Metal Edge Flashing Drip Edge or Gravel Stop

1. Remove un-bonded, torn, cut, punctured or split flashing membrane.

2. Replace damaged edging or sections that have corroded through the metal.

3. Clean lightly corroded surfaces, prime the surface and then paint with corrosion resistant paint.

4. Refasten loose edging by removing fasteners that are backing out and re-nailing into solid blocking with annular ring or threaded nails within I inch of the removed nail. Use a staggered nailing pattern approximately 3 inches (76mm) on center.

5. Remove debris and unbonded material metal surface and apply a thin continuous film of asphalt primer and allow to dry. Firmly adhered bitumen or adhesive does not have to be removed from the metal edge.

6. Install the same type and number of plies of flashing (a minimum of 2 plies) that were removed from the original base flashing in hot asphalt or vertical (flashing) grade roof cement. Extend the first ply at least 6 inches (152 mm) beyond the area to be repaired and each successive ply at least 3 inches (76mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of application, use Type III or IV asphalt and

7. Recant the flashing with a coating compatible with the

BUR 25 - Penetrations Loose or Unbonded Membrane Flashing

Penetrations include such items as pipes, plumbing soil pipe vent stacks, penetration pockets (pitch pans), antennas, curbs, etc. Prefabricated boot flashings may be available for different penetrations and can be installed when a flashing is no longer watertight.

1. Penetration flashings which have holes corroded through the metal must be replaced with new flashings.

2. Surface corrosion on penetration flashing metal should be wire brushed, primed and then painted with a corrosion resistant paint.

3. Remove cracked or deteriorated stripping ply(s) at flanges, metal sleeves or curb flashings and clean to prepare for primer application.

4. Prime the surface of the membrane (asphalt BUR only) solvents and is used to enhance adhesion; however,

5. Install the same type and number of plies of flashing (a minimum of 2 plies) that were removed from the original base flashing in hot asphalt or vertical (flashing) grade roof cement. Extend the first ply at least 6 inches (I 52mm) beyond the area to be repaired" and each successive ply at least 3 inches (76 mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt at the method of application, use Type III or IV asphalt and take care to maintain the asphalt at

6. Recoat the flashing with a coating compatible with the

7. Repair open seams or fishmouths:

a) Pull back the unbonded lap material until reaching an area that is properly adhered.

b) Sweep and clean accumulated dirt from the unbonded

c) Clean the surface of the membrane over which the patch will be installed.

d) Prime the surfaces with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the

e) Reflash with modified bitumen membrane stripping, extending 6 inches (152mm) onto the adjoining roofing membrane set in hot asphalt (SBS only), cold adhesive, or heat welded.

f) Apply moderate pressure to the patch to assure adhesion to the existing flashing.

BUR 26 - Pitch Pans

1. lf the filler material has cracked, pulled away from the side(s) of the pocket or is below the level of the top of the pan, remove loose or damaged sealant material, dirt, foreign material or water.

2. Apply in thin continuous film of asphalt primer to [he inside walls of the pitch pan and the side of the penetration and allow to dry.

3. Top off the pitch pan with a compatible pourable sealer, crowning the filler material to provide for positive drainage of moisture around the penetration.

PITCH PANS

SCALE: N.T.S. BUR 26

BUR 27 - Interior Drains

If leaks are suspected at interior drains, ensure the drain is free-flowing, then check (water test, if necessary) the drain bowl and plumbing from the underside of the deck (if access is possible) to determine if plumbing parts are cracked, if condensation is a problem, or if the plumbing joints are leaking. If there are no problems evident, inspect membrane-to-drain bowl interface for voids/problems.

Check clamping ring bolts and snug-down in sequence to tighten clamping ring. If leak persists:

1. Remove the drain clamping ring. Repair or replace all drain parts that are missing or are broken. Drilling and retapping of drain bolts and receivers may be necessary.

2. Cut back and remove the existing membrane flashing.

3. Remove the sheet lead flashing.

4. Set a new sheet lead, minimum 3 pounds per square foot

(15kg/sq m) primed on both sides and set in compatible asphalt roof cement. Carefully conform it to the drain bowl with a rubber or wooden mallet.

flashing in hot asphalt, or cold adhesive. Extend the first ply at least 6 inches (152mm) onto the roof and each successive ply at least 3 inches (76mm) beyond the previous ply. As an alternative, 2 plies of modified bitumen sheet may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used.

When using hot asphalt as the method of application, use Type III or IV asphalt and take care to maintain the asphalt at

6. Reinstall the clamping ring and secure the bolts by tightening them in alternating sequence.

7. Replace gravel guards as necessary.

8. Recoat the flashing with a coating compatible with the

BUR 28 - Scuppers

1. Check the seal between the membrane flashing and the scupper. Remove any loose membrane or flashing material.

2. Resecure scupper if loose.

3. Wire brush, prime and paint areas of the scupper that are corroded or have lost its protective coating with a corrosion resistant paint.

4. Clean scupper surface to be flashed and apply a thin, continuous film of asphalt primer and allow to dry.

flashing in hot asphalt, or cold adhesive. Extend the first ply at least 6 inches (I52mm) beyond the scupper and each successive ply at least 3 inches (76mm) beyond the previous, ply. As an alternative, 2 plies of modified bitumen sheer may be installed by torch application, in hot asphalt or suitable cold adhesive, whichever is appropriate for the modified sheet being used. When using hot asphalt as the method of

6. Recoat the flashing with a coating compatible with the existing, if any. Regravel any areas where spudding occurred, taking care to cover all exposed felts.

7. Repair open seams or fishmouths:

a) Pull back the unbonded lap material until reaching an area that is properly adhered.

b) Sweep and clean accumulated dirt from the unbonded

c) Clean the surface of the membrane over which the patch will be installed.

d) Prime the surfaces with asphalt primer and allow to dry. Primer contains solvents and is used to enhance adhesion; however, overuse of primer can harm the membrane.

e) Reflash with felt or ply sheet stripping, extending 6 inches onto the adjoining roofing membrane set in hot asphalt or cold adhesive.

f) Apply moderate pressure to the patch to ensure adhesion to the existing flashing.

BUR 29 - Expansion Joint Covers

Overall (e.g., structural) deficiency of an expansion joint is not covered by this document. Please refer to reference sources for expansion joint details.

1. lf the expansion joint cover is a flexible bellows type, check for wear of the bellows. Replace expansion joint cover sections as necessary.

2. If the splice cover is defective, remove the splice and then resplice with a like material.

3. Refasten loose sections and reflash where necessary.

4. Check the flashing strip which joins and waterproofs end joints of the expansion joint cover. If loose, remove and replace.

5. If the expansion joint cover is a membrane material (thermoplastic, thermoset, or bituminous) overlay the damaged area with like material to an area where a good seal can be made and seal all seams.

BUR 30 - Interior Gutters

1. Damaged, surface rusted, or lightly corroded gutters or gutters leaking due to joint movement should be cleaned to bare metal primed and then lined with

2. Remove and replace sections of gutter that are severely corroded prior to installing the waterproofing membrane.