9-A02 Hamilton ROOF Tuckpointing.pdf

SECTION 073113 – SLATE SHINGLES

PART 1 – GENERAL

St. Louis Public Schools is seeking a qualified roofing contractor to repair and replace all the tornado damaged roofing, gutters, sheet metal, and tuck-pointing. It is our goal to get a complete warranty roof system which includes but is not limited to Slate tile and Modified -Bitumen asphalt roofing

1.1 SUMMARY

A. Section includes:

1. Supply all labor, transportation, material apparatus, tools, and permits necessary for removal and replacement of existing roofing system. Contractors shall verify roof construction and square feet. Refer to roof plan drawing for roof area locations.

2. Natural slate roofing shingles

3. Underlayment and flashing

4. Fasteners and accessories

5. Wood deck repairs as needed throughout.

6. Install new gutters and downspouts to match existing metal thickness, profile and color. Kynar coated metal will be accepted instead of copper/stainless. The district will keep all copper materials.

1.2 REFERENCES

A. ASTM C406 – Standard Specification for Roofing Slate

B. ASTM D226 – Asphalt-Saturated Organic Felt

C. ASTM D4869 – Asphalt-Saturated Organic Felt Underlayment

D. NRCA – National Roofing Contractors Association Guidelines

E. SMACNA – Sheet Metal and Air Conditioning Contractors National Association Standards

1.3 SUBMITTALS

A. Product data for slate, underlayment, fasteners, and accessories

B. Slate samples showing full range of color and texture

C. Installation details

D. Certificates of compliance with ASTM C406

E. Warranty documentation

1.4 QUALITY ASSURANCE

A. Installer qualifications: Minimum 5 years’ experience in slate roofing.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Store slate on pallets off ground, under cover, and ventilated

B. Do not double-stack pallets

C. Protect from moisture and physical damage

1.6 WARRANTY

Manufacturer’s warranty for slate: Minimum 75 years

Installer’s warranty: 3 years’ labor and workmanship

PART 2 – PRODUCTS

2.1 SLATE SHINGLES

B. Material:

1. ASTM C406 Grade S1 (High Density, Weather Resistant)

2. Type: Natural split slate

3. Thickness: 3/8” to 1/2” (9 to 13 mm)

4. Length x Width: [e.g., 20” x 10”] (customizable)

5. Color: Specify – e.g., unfading gray/green, mottled purple/black. To be chosen by the owner from available colors.

C. pre-drilled holes: Required

2.2 UNDERLAYMENT

A. Ice and Water Shield:

1. Self-adhering, rubberized asphalt membrane

2. ASTM D1970 compliant B. Felt Underlayment:

1. ASTM D226 Type II or ASTM D4869 No. 30 asphalt-saturated felt

2.3 FLASHING AND METAL WORK

A. Material: Copper, minimum 16 oz. (preferred), or stainless steel

B. Drip edge, step flashing, valley flashing, ridge and hip caps

C. SMACNA compliant

2.4 FASTENERS

A. Copper or stainless-steel roofing nails

B. Minimum 1-1/2” long, ring shank preferred

C. Two nails per slate shingle

PART 3 – EXECUTION

3.1 EXAMINATION

A. Verify deck is smooth, clean, and properly sloped

B. Repair damaged decking before starting

3.2 INSTALLATION

A. General:

1. Follow Slate Roofing Contractors Association (SRCA) guidelines

2. Double coverage: Minimum 3” head lap, 3” side lap B. Eave Protection:

1. Install ice and water shield minimum 36” upslope from eaves

2. Extend underlayment 6” vertically at sidewalls C. Underlayment:

1. Install felt underlayment over dry deck, lapped 2” horizontal and 6” vertical D. Slate Application:

1. Start at eaves; stagger joints every course

2. Maintain consistent exposure (typically 7” to 8”)

3. Use hook ladder or roof brackets for access, no walking on slate E. Flashing:

1. Install step flashing at all walls and chimneys

2. Use open or closed valleys as specified, with metal lining F. Ridge and Hip Caps:

1. Use matching slate or copper hip/ridge treatment

3.3 CLEANING

A. Remove all debris and unused materials

B. Clean adjacent surfaces of roofing residue

3.4 PROTECTION

a. Protect completed work from damage until final acceptance

1.1Standing seam metal roofing

A) Remove damaged metal entrance roof at West entrance.

A) Install a new double lock steam 24-gauge roofing over a high heated ice and water shield underlayment.

Alternate 1:

Hazard Mitigation Opportunities:

1. Roof System Hardening• Replace damaged roofing with impact-resistant materials rated for high wind zones.

2. Roof System Hardening• Replace damaged roofing with impact-resistant materials rated for high wind zones.

3. Moisture-Resistant Interior Finishes• Install mold-resistant ceiling panels and wall coatings in vulnerable areas.

4. Drainage and Waterproofing Enhancements• Upgrade roof drainage systems and install waterproof membranes beneath roofing layers.

5. Structural Reinforcement• Add lateral bracing to load-bearing walls in the original structure to improve wind resistance.

6. HVAC and Utility Anchoring• Secure rooftop HVAC units with wind-rated anchoring systems.

7. Elevate electrical panels above base flood elevation where feasible.

A.