Spec 071200 - Built-up Bituminous Waterproofing.doc

10-07M

SECTION 07 12 00

BUILT-UP BITUMINOUS WATERPROOFING

PART 1 - GENERAL

1.1 DESCRIPTION:

This section specifies impervious built-up membranes of bituminous materials used for waterproofing.

1.2 RELATED WORK:

A.

Reglets: Section 07 60 00, FLASHING AND SHEET METAL.

B.

Wood Nailers: Section 06 10 00, ROUGH CARPENTRY.

C.

Cement Topping: Section 03 30 00, CAST-IN-PLACE CONCRETE.

1.3 SUBMITTALS:

A.

Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B.

Manufacturer's Literature and Data: Fiberboard, asphalt primer, felts and fabrics (each type to be used)

C.

Certificates: Indicating materials conform to contract specifications.

1.4 PRODUCT DELIVERY, STORAGE AND HANDLING:

A.

Deliver materials to job in manufacturer's original unopened containers with brand name marked thereon.

B.

Before proceeding with work, protect surfaces from excessive changes in temperature and protect piping, conduits and installed equipment and materials.

1.5 APPLICABLE PUBLICATIONS:

A.

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in text by basic designation only.

B.

American Society for Testing and Materials (ASTM):

C208-95 (R2001) Cellulosic Fiber Insulating Board

D41-94 (2000) Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

D43-00 Coal Tar Primer used in Roofing, Dampproofing, and Waterproofing

D173-03 Bitumen-Saturated Cotton Fabrics used in Roofing and Waterproofing

D226-97 Asphalt-Saturated Organic Roofing Felt Used in Roofing and Waterproofing

D227-03 Coal-Tar-Saturated Organic Roofing Felt Used in Roofing and Waterproofing

D449-03 Asphalt Used in Dampproofing and Waterproofing

D450-96(R2006) Coal Tar Pitch Used in Roofing, Dampproofing, and Waterproofing

D1327-04 Bitumen-Saturated Woven Burlap Fabrics Used in Roofing and Waterproofing

D1668-97(R2006) Glass Fabrics (Woven and Treated) for Roofing and Waterproofing

D2178-04 Asphalt Glass Felt Used in Roofing and Waterproofing

D4022-07 Coal Tar Roof Cement

D4586-07 Asphalt Roof Cement, Asbestos-Free

PART 2 – PRODUCTS:

2.1 BITUMEN:

A.

Asphalt: ASTM D449, Type I, for exterior work below grade, Type III for work above grade, where asphalt will be exposed to sunlight.

B.

Coal-Tar: ASTM D450, Type II.

2.2 FELTS AND FABRICS (FOR USE WITH ASPHALT):

A.

Cotton Fabric Asphalt-Saturated: ASTM D173.

B.

Organic Felt Asphalt-Saturated: ASTM D226, Type I.

C.

Glass Mat (Fabric) Asphalt-impregnated: ASTM D2178, Type IV.

2.3 FELTS AND FABRICS (FOR USE WITH COAL-TAR):

A.

Cotton Fabric Coal-Tar Saturated: ASTM D173.

B.

Organic Felt Coal-Tar Saturated: ASTM D227.

C.

Burlap (Fabric) Coal-Tar Saturated: ASTM D1327.

D.

Glass Fabric, Coal-Tar Treated: ASTM D1668.

2.4 PRIMER:

A.

Use ASTM D41 for asphalt products.

B.

Use ASTM D43 for coal-tar products.

2.5 FIBERBOARD:

ASTM C208, Type V, Class C, 13 mm (1/2-inch) thick.

2.6 CEMENT:

A.

ASTM D4022 with coal tar products.

B.

ASTM D4586 with asphalt products.

PART 3 – EXECUTION:

3.1 PREPARATION:

A.

Do not apply waterproofing when ambient temperature is 4.4oC (40oF) or lower.

B.

Cleaning and Filling:

1.

Before applying waterproofing materials, clean surfaces smooth, firm and dry.

2.

Remove high spots, depressions, loose and foreign particles; and fill all voids, joints and cracks with Portland cement mortar.

3.

Surface shall be approved by Resident Engineer before waterproofing is started.

3.2 GENERAL:

A.

Ventilation: Provide adequate ventilation for waterproofing installed in enclosed spaces.

B.

Compatibility of Materials: Use coal-tar pitch with coal-tar-saturated felts and fabric. Use asphalt with asphalt-saturated felts and fabrics.

C.

Temperature of Bitumen: Heat bitumen to flow freely when applied, but not above 190oC (375oF) for coal-tar, and not above 230oC (450oF) for asphalt.

D.

Rate of Application: Apply primers at the rate of 0.4 L/m2 (one gallon per 100 square feet) over concrete and parging. Apply coal-tar at the rate of 1.9 kg/m2 (40 pounds per 100 square feet) and asphalt at the rate of 1.5 kg/m2 (30 pounds per 100 square feet), for each mopping.

E.

Number of Plies:

1.

Membrane waterproofing shall consist of four plies of felt or fabric.

2.

Install membrane by lapping each ply approximately three-quarters over the preceding ply.

3.

Use appropriate width starting strips of felt or fabric at the starting line to provide four plies at the edge.

3.3 APPLICATION

A.

Exterior Vertical Surfaces:

1.

Start each ply at the bottom, placed vertically, in hot bitumen and complete prior to applying the next ply.

2.

Overlap plies downward.

3.

Lap each ply 100 mm (4 inches) at the end. Stagger end laps not less than 450 mm (18 inches) in relation to preceding layer.

4.

Bitumen shall be applied to exterior vertical surfaces with cotton roller mops or other approved application devices.

5.

Waterproofing membranes shall be installed vertically, shingle fashion, in the manner specified herein.

6.

The membrane shall extend 50 mm (2 inches) from the outer edge of footing, across the top of the footing, and up foundation wall to approximately 100 mm (4 inches) below the finished grade.

7.

Tops of the membranes shall be // secured and protected as indicated // nailed to treated wood nailers set flush with the face of the wall and covered with two piles of fabric reinforcement. // Nailing shall be 200 mm (8 inches) on centers on a line 38 mm (1-1/2 inches) below the top of the membranes.

B.

Horizontal Surfaces:

1.

Apply waterproofing membranes for floor slabs to a primed, smooth surface base slab.

2.

Apply felts shingle fashion in moppings of hot bitumen.

3.

Carry membranes up abutting vertical surfaces to the level approximately 150 mm (six inches) above the finish floor unless otherwise shown.

4.

Extend felts to intersections with interior surfaces of foundation walls.

5.

Where membranes pass over interior footings for load-bearing partitions, they shall be reinforced with two plies of fabric membrane in moppings of hot bitumen applied at the rate specified.

6.

The fabric plies shall extend a minimum of 150 mm and 200 mm (6 and 8 inches), respectively, beyond the edges of the footing.

7.

After all reinforcing membranes have been installed, the entire surface shall be covered uniformly with hot bitumen applied at the rate specified.

C.

Fabric Membrane Reinforcement:

1.

Provide fabric membranes to reinforce felts at intersections.

2.

Reinforcement shall consist of two plies of fabric membrane cemented in place and to each other with roofing cement not less than 2 mm (1/16 inch) thick for each coating.

3.

At the intersection of slabs and vertical surfaces, extend the first ply at least 150 mm (6 inches) on the slab and 100 mm (4 inches) up the vertical surface.

4.

At Intersections of two vertical surfaces, extend the first ply at least 250 mm (10 inches) on each side of the intersection.

5.

The second ply shall lap the first by not less than 50 mm (two inches).

D.

Keyed Joint Footings:

1.

Provide an asphaltic-coated 454 g (16-ounce) cold-rolled copper flashing sheet with joints soldered and neatly formed to the contours of keyed joints in foundation wall footings.

2.

The flashing sheet shall extend a minimum of 250 mm (10 inches) beyond the inside edge of the footing and shall be bent down 100 mm (4 inches) on the outside of the footing.

3.

Protect the flashing sheet until it is lapped by the waterproofing membranes for the subsurface floor slabs and foundation walls.

E.

Flashing Flanges:

1.

Prime flashing flanges of the sleeves of pipe and ducts penetrating the waterproofing membrane.

2.

Allow primer to dry and strip flanges in with two fabric membrane collars cemented in place and to each other with bituminous plastic cement. The collars shall extend 100 mm and 150 mm (four and six inches), respectively, beyond the edge of the flanges, cover the flanges, and fit tight against the sleeve.

3.

Waterproofing connecting with work exposed to the weather shall extend back of same, or be counter-flashed to form a watertight connection.

F.

Clamping Devices:

At floor drains and elsewhere as indicated, extend membrane into clamping device set in heavy coating of bituminous roof cement and clamp securely.

G.

Reglets:

1.

Where indicated, install continuous reglets as specified in Section, 07 60 00, FLASHING AND SHEET METAL, to receive the exposed edges of membrane waterproofing.

2.

After placement of waterproofing, completely fill reglets with bitumen.

H.

Wood Nailers:

1.

Where indicated, upper edges of membrane waterproofing shall be nailed to wood nailers and covered with two plies of fabric reinforcement.

2.

Wood nailers are specified in Section 06 10 00, ROUGH CARPENTRY.

3.4 PROTECTIVE COVERING:

A.

Fiberboard Protection of Waterproofing on Walls:

1.

Install 13 mm (1/2-inch) thick fiberboard for protection of exterior membrane waterproofing walls and footings below grade.

2.

Fiberboard shall extend full height of backfill.

3.

Mop a coat of hot pitch or asphalt over membrane sufficient for installation of one piece of fiberboard and embed board therein.

4.

Assure overall contact on vertical surfaces by use of a wooden mallet.

5.

Repeat the operation in adjoining areas until protection is complete.

6.

Adjoining boards shall have edges in moderate contact.

7.

After protection boards are in place, mop exposed surfaces with hot pitch or asphalt, and fill joints.

B.

Horizontal Surfaces: As soon as the application has thoroughly dried, apply protective cement topping specified under Section 03 30 00, CAST-IN-PLACE CONCRETE.

3.5 INSPECTION:

Do not cover waterproofed surfaces by other materials or backfill until the work is approved by Resident Engineer.

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