073213 CLAY ROOF TILES_ADD1.pdf

Fort Bliss National Cemetery VA Project 886CM3026

Gravesite Expansion Bid Documents

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SECTION 07 32 13

CLAY ROOF TILES

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Clay roof tiles over underlayment nailed to wood roof sheathing.

Section also includes related flashing installation and other requirements specific to the above.

1.2 RELATED WORK

A. Section 06 10 00, ROUGH CARPENTRY:

B. Section 07 01 50.19, PREPARATION FOR RE-ROOFING.

C. Section 07 60 00, FLASHING AND SHEET METAL: Counterflashing and

Flashing of Roof Projections.

D. Section 07 92 00, JOINT SEALANTS: Sealants.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. ASTM International (ASTM):

B3-13(2018).............Soft or Annealed Copper Wire.

C270-19ae1..............Mortar for Unit Masonry.

C920-18.................Elastomeric Joint Sealants.

C1167-11(2017)..........Clay Roof Tiles.

D1970/D1970M-20.........Self-Adhering Polymer Modified Bituminous Sheet

Materials Used as Steep Roofing Underlayment for Ice Dam Protection.

D4586/D4586M-07(2018)e1. Asphalt Roof Cement, Asbestos-Free.

F1667-18a............... Driven Fasteners: Nails, Spikes, and Staples.

1.4 PREINSTALLATION MEETINGS

A. Conduct pre-installation meeting at project site minimum 30 days before beginning Work of this section.

1. Required Participants:

1) Contracting Officer's Representative.

2) Architect/Engineer (at the request of the VA COR and as contracted for the site visit).

3) Contractor.

4) Installer.

5) Manufacturer's field representative (as required by manufacturer to ensure warrantied installation).

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6) Other installers responsible for adjacent and intersecting work, including flashing and sheet metal.

2. Meeting Agenda: Distribute agenda to participants minimum 3 days before meeting.

1) Installation schedule.

2) Installation sequence.

3) Preparatory work.

4) Protection before, during, and after installation.

5) Installation.

6) Terminations.

7) Transitions and connections to other work.

8) Other items affecting successful completion.

3. Document and distribute meeting minutes to participants to record decisions affecting installation.

1.5 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and details of custom shapes.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Installation instructions.

D. Samples:

1. Clay Roof Tiles: Full sized, each type and color.

1) Submit quantity required to show full color range.

E. Operation and Maintenance Data:

1. Care instructions for clay roof tiles.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, color, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Store tiles according to manufacturer's instructions. Store roll goods on end in upright position.

B. Protect products from damage during handling and construction operations.

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C. Keep materials dry, covered completely and protected from weather.

1.8 FIELD CONDITIONS

A. Environment: Mortaring Ambient Temperature: Minimum 4 degrees C

(40 degrees F) and rising.

1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

PART 2 - PRODUCTS

2.1 PRODUCTS - GENERAL

A. Design consistent with (To match existing):

1. Type: Two-piece Mission, tapered

2. Size: Match existing where work entails selective tile replacements only. Where entire roof clay tile is being replaced, provide one size throughout, total length of barrel tile between (18”-20”)

3. Color: To match existing.

B. Provide clay roof tile from one manufacturer and from one production run.

C. Note about existing wood roof deck/sheathing at PIC/Restroom building:

Asbuilt drawings provided by the VA during design indicate the existing substrate is a composite nailable rigid board insulation for the clay tile roofing. The exact known thickness or material of the nailable surface is unknown as destructive demolition was not performed during design. Bid shall anticipate and include the cost to provide additional plywood sheathing as required to meet the clay roof tile manufacturer’s warranty requirements for the roof assembly, including fastenings requirements. OSB not allowed.

D. Note about existing wood roof deck/sheathing at Administration building. Asbuilt drawings provided by the VA during design indicate a

1 inch thick sheathing, except 5/4 inch sheathing at roof overhangs for the clay tile roofing substrate at the Administration building. The exact known thickness or material of the sheathing is unknown as destructive demolition was not performed during design. Bid shall anticipate and include the cost to provide additional wood sheathing as required to meet the clay roof tile manufacturer’s warranty requirements for the roof assembly, including fastening requirements.

OSB not allowed.

2.2 CLAY ROOF TILES

A. Clay Roof Tiles: ASTM C1167, Grade 1, Type I, High profile.

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B. Special Shapes: Eave closure tiles, top fixtures, rolled rakes, ridge covers, hip covers, hip/ridge terminals (closed ends) and other shapes indicated on drawings.

C. Tiles for Repairs: Match existing tile color, size, and shape.

2.3 ROOFING NAILS

A. Nails for Clay Roof Tiles: ASTM F1667, Type I, Style 23, copper slating nails.

1. Length: Penetrate roof deck minimum 19 mm (3/4 inch).

2.4 ROOFING UNDERLAYMENT

A. Self-Adhering Polymer Modified Bituminous Sheet Material: ASTM

D1970/D1970M-20, minimum thickness 40 mils or as required to meet manufacturer’s warranty.

B. Approved equal, as permitted by clay tile roof manufacturer.

2.5 METAL FLASHING

A. Provide metal roof flashings, including apron flashings, step flashings, valley flashings, drip edges, and vent pipe flashings specified in Section 07 60 00, FLASHING AND SHEET METAL and as shown in the drawings.

2.6 ACCESSORIES

A. Asphalt Roof Cement: ASTM D4586/D4586M, Type II.

B. Mortar: ASTM C270, Type N or O. Match tile color.

C. Joint Sealant: ASTM C920, nonstaining silicone, Type S, Grade NS, Class 100/50.

D. Nailers: Preservative-treated wood complying with Section 06 10 00, ROUGH CARPENTRY.

E. Nose Clips: Manufacturer's standard copper nose clip. Provide nose clips where wind speed in project location exceeds 110 mph with design wind speed of 100 mph and where required by clay roof tile manufacturer to meet warranty requirements.

F. Copper Wire: ASTM B3, 2.11 mm (0.083 inch) diameter, minimum.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for roofing installation.

1. Verify roof substrates are sound, within manufacturer's tolerances, and free from defects which would interfere with roofing installation.

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2. Remove all existing underlayment for installation of new underlayment if required or recommended by underlayment or clay tile roofing manufacturer to meet warranty requirements.

3. Verify roof accessories, vent pipes and other projections through roof are in place and roof flashing is installed, or ready for installation, before installing clay roof tiles.

4. Ensure other construction operations requiring roof deck traffic are complete.

B. Protect existing construction and completed work from damage.

C. Remove mortar from base of chimneys to ensure new can be installed tight to the building construction.

3.2 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings.

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

3.3 METAL DRIP EDGE INSTALLATION

A. At eaves and rakes, install copper drip edges specified in Section

07 60 00, FLASHING AND SHEET METAL.

1. Eaves: Install metal drip edge before underlayment.

2. Rakes: Install metal drip edge after underlayment.

B. Secure metal drip edges with compatible nails spaced maximum 250 mm

(10 inches) on center along inner edges.

3.4 FLASHING INSTALLATION

A. Install metal flashings at valleys and projections through deck such as chimneys and vent stacks. Install metal flashings to comply with requirements in Section 07 60 00, FLASHING AND SHEET METAL.

B. Install step flashing at intersections with vertical surfaces. Except where flashing is surface mounted, continuous apron flashing may be used complying with the minimum vertical leg height noted below.

1. Length: Length of tile plus 50 mm (2 inches).

2. Vertical Leg Height: 200 mm (8 inches) minimum.

3. Horizontal Leg Width: 150 mm (6 inches) minimum.

C. Install apron flashing to cover roof tiles at downslope sides of projections.

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D. Install crickets on upslope sides of projections. Cricket dimensions provided in the drawings are minimums and are permitted to increase with permission of the Architect and VA COR.

E. Overlap vertical leg of channel flashing and apron flashing with counterflashing 50 mm (2 inches) minimum.

F. Valley Flashing: Shingle type, as indicated in Section 07 60 00, FLASHING AND SHEET METAL.

1. Secure valley flashing according to manufacturer's instructions.

2. Width: 300 mm (12 inches) minimum, both sides of valley.

3.5 UNDERLAYMENT INSTALLATION

A. Install (2 layers) self-adhering sheet underlayment, working from low point to high point, continuously over the entirety of roof surfaces on the Administration and PIC Restroom Building. Lap sides 90 mm

(3-1/2 inches) minimum, and lap ends 150 mm (6 inches) minimum. Install per additional instructions at the following locations:

1. Eaves and Rakes: Lap underlayment over eave metal drip edge.

2. Sidewalls and Projections through Roof: Extended 450 mm (18 inches) from projection and extended up projection as per drawings but no less than 150 mm (6 inches) minimum.

3. Roll underlayment to ensure adhesion to roof deck and metal flashings.

4. Lap in direction of flow.

5. Stagger vertical joints.

3.6 ROOF ACCESSORY INSTALLATION

A. Lap underlayment over base flanges of roof accessory flashings.

B. Install channel flashing and counterflashing at base of roof accessories.

3.7 NAILER INSTALLATION

A. Fasten wood nailers to roof deck at ridges, hips, and rakes.

3.8 CLAY ROOF TILE INSTALLATION

A. Lay courses parallel with eaves.

B. Do not stretch courses.

C. Space courses to finish even and parallel upper level terminations.

D. Use special shapes to start and finish hips, ridges, and rakes.

E. Fit tiles closely at ridges, around vent pipes, flashing and other projections through roof.

F. Secure each tile with two nails, where possible.

1. Use copper wire fastening where nails are not possible.

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G. Install nose clips according to manufacturer's instructions as required.

H. Cover nails and wire fastenings in finished work.

I. Lay tile with minimum 75 mm (3 inches) end lap unless otherwise required by manufacturer.

J. Recess eave closure tile minimum 38 mm (1-1/2 inches) from lower end of tile.

K. Fill laps at the following locations with roof cement:

1. End bands.

2. Ridge cover tiles.

L. Use maximum 6 mm (1/4 inch) thick roof cement to level tile.

1. Use mortar to level and bed tile where off-level dimension exceeds

6 mm (1/4 inch).

M. Use sealant to point around eave closures, ridge cover joints, and top fixtures.

1. Apply sealant cap bead over exposed fasteners.

2. Comply with Section 07 92 00, JOINT SEALANTS.

N. Coordinate with Section 07 60 00, FLASHING AND SHEET METAL for installation of flashing with tile work. Keep flashing concealed except where exposed on vertical surfaces or otherwise shown in the drawings.

O. Valleys: Open.

1. Do not nail within valley.

3.9 REPAIR

A. Replace damaged and stained tiles.

3.10 CLEANING

A. Upon completion remove cement splatter and excess roof cement from clay roof tile and adjacent surfaces.

3.11 PROTECTION

A. Protect clay roof tiles from construction operations.

B. Do not allow traffic on roof after completion.

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