Metal Roofing

What’s a Metal Roof?

Metal Roofing is custom fabricated or field formed roofing composed of single layer of metal sheets installed over structural substrate. Includes aluminum, copper, lead, steel, stainless steel, monel, and terne sheet metal roofing.

Types of Metal Roof: Standing Seam Sheet Metal Roofing, Batten Seam Sheet Metal Roofing, Flat Seam Sheet Metal Roofing and Tinplate Roofing.

I. GENERAL

1.01 SUMMARY

Our metal roof coating systems offer a complete solution with a substantially lower investment than replacing your entire metal roof. In addition the metal roof coating system creates a highly reflective seamless membrane which will greatly reduce the metal roof surface temperature and energy cost.

• This outlines Metal Roof repair, coating and restoration procedures for the application of Fixallroof Coatings to fix roof leaks and extend the service life.
• These are suggested specifications and actual application requirements may vary and are the responsibility of the installer.
• The manufacturer’s application instructions for each product used are considered part of these specifications and should be followed at all times.

1.02 SUBMITTALS

• Submit product data sheets, technical data verifying physical properties of materials and installation instructions.
• Upon request, submit test reports demonstrating compliance with specified design and performance criteria.
• Submit material safety data sheets.

1.03 QUALITY ASSURANCE

• Supplier Qualifications: The Fixallroof Coating System for metal roofs, as supplied by Fixallroof Coatings, is approved for use on the project.
• Installer Qualifications: Utilize an installer with demonstrated experience on projects of similar scope and complexity. The installer shall be approved by Fixallroof Coatings to apply the system. Manufacturer’s written verification of applicator approval is required.

1.04 DELIVERY, STORAGE AND HANDLING

• Delivery: Deliver materials in manufacturer’s original, unopened, undamaged containers with identification labels intact.
• Storage: Store all materials at temperatures between 55°F – 90°F (12.7°C – 32.2°C) with careful handling to prevent damage. Do not store at high temperatures in direct sunlight. Protect from exposure to harmful environmental conditions.
• Protection: Protect all materials from freezing and other damage during transit, handling, storage and installation.

1.05 PROJECT/SITE CONDITIONS

• Substrate should be structurally sound.
• No application of materials are permitted if inclement weather, precipitation, freezing temperatures are expected within 24 hours or if the following conditions are present:

 

Water-Based
Ambient Air Temperature	below 55°F (10°C) or above 100°F (37.8°C)
Substrate Temperature	below 45°F (7.2°C) or above 130°F (54.4°C)
Humidity:	above 85% (allow extended drying time above 80%)

 

Solvent-Based
Ambient Air Temperature	below 45°F (7.2°C) or above 95°F (35.0°C)
Substrate Temperature	below 35°F (1.6°C) or above 120°F (48.8°C)
Humidity	above 95%

• Recommendations for material consumption are for ideal conditions. Product coverage rates may vary due to uneven application, surface texture, absorptive properties, wind conditions while spraying and/or other variables.
• A moisture survey or other assessments may be needed to determine the presence of wet insulation under existing roofing material.

1.06 DETAIL WORK

• This specification may not outline all procedures for preparation and finishing of penetrations, drains, flashings, etc. This work should be outlined separately by the contractor before the work commences and shall be performed observing good trade practices.

II. PRODUCTS 2.01 FIXALLROOF RESTORATION SYSTEM

• The elastomeric roofing system for metal roofing repair is a spray-applied roof coating supplied by Fixallroof Coatings.

 

Product	Acrylic System	Solvent System	Asphalt System
PrimeLock Primer	Acrylic Primer	MultiService Primer	Zinc Primer
Seam Products	PolyScrim Roofing Fabric Acrylic Elastomeric Caulk	PolyScrim Roofing Fabric Butyl Rubber Caulk	PolyScrim Roofing Fabric Butyl Rubber Caulk
Base Coat / Top Coat	Acrylic Elastomeric Coating	Butyl Rubber Coating	Aluminized Asphalt Coating

2.02 PRODUCT SUBSTITUTIONS

• SeamStitch Polyurethane Caulk, SeamStitch Butyl Tape or Eternabond WebSeal may be used in lieu of PrimeLock Bonding Primer and PolyScrim on small non-structural gaps, flashings, seams and sheet metal overlaps.
• SeamStitch Polyurethane Caulk may be used in lieu of EnergyGuard Acrylic and Butyl Rubber Caulks to seal fasteners heads.
• Use Butyl Rubber Coating instead of PrimeLock Bonding Primer as the adhesive for PolyScrim when installing the Solvent Based System.

2.03 RELATED MATERIALS

• Roof accessories, flashing, seam tapes and similar materials shall be approved by the manufacturer. All materials used shall be applied in accordance with its manufacturer’s recommendations.

2.04 EQUIPMENT

• Visit the Fixallroof website for recommended spray equipment guidelines, or consult the spray equipment manufacturer directly.

III. EXECUTION 3.01 MANUFACTURER’S INSTRUCTIONS

• Comply with the instructions and recommendations of the roof restoration system manufacturer.
• Comply with manufacturer’s product data, including product technical bulletins.

3.02 EXAMINATION

• Verify conditions are acceptable for application of roof restoration system.
• Inspect metal roof to receive roof coating and make sure they are clean, sound, properly prepared and free of moisture, dirt, debris or other contaminants.
• Verify that all on-roof items, penetrations, mechanical equipment, hvac drains are in place and secure. All airconditioning and air intake vents should be suitably protected or closed.
• Verify that areas within the vicinity of the application area as protected from overspray.
• Verify that all roof drains, gutters, downspouts, catch basins are clean and in working order.

3.03 PREPARATION

• Cleaning: The entire metal roof surface must be clean, sound, dry and free of any contaminants that would interfere with the proper adhesion of the roof coating. This may require pressure washing, scraping, wire brushing or other means necessary while observing responsible trade practices. All loose paint and rust should be removed before applying any product.
• Residual Asphalt: Installer shall make every effort to remove all loosely adhered asphaltic roofing elements.
• Ponding Water: Contractor shall make every effort to mechanically eliminate all ponding water areas on the metal roof prior to application of any roof coating product. For roofs with minor ponding (ie. small puddles less than 1/2″ deep) that cannot be corrected, consider using the solvent system.
• Repairs: Repair and dented and/or damaged roof panels to correct any ponding areas.
• Do not apply coatings until all unsatisfactory conditions have been corrected in a manner acceptable to the original metal roofing manufacturer.

3.04 APPLICATION

• Inspect metal roof to receive roof coating. Always perform a coating adhesion test before doing the entire job.
• Primer: Entire metal roof shall be primed using the appropriate primer and following the application rates specified in the table below.
• Seams: All seams, penetrations and parapet walls should be flashed using PolyScrim Fabric and PrimeLock Bonding Primer. Apply a thin coat of PrimeLock Bonding Primer over the seam and roll out 6″ fabric over the seam and apply another coat of PrimeLock Bonding Primer over the fabric. Encapsulate the fabric with the appropriate elastomeric coating and feathering it at least 2″ to 3″ past the edge of the fabric. Substitute PrimeLock Bonding Primer with Butyl Rubber Coating when installing a solvent system. Read 2.02 for details.
• Exposed Fasteners: Exposed fasteners should be inspected, tightened or replaced as needed. Fastener heads should be caulked.
• Base Coat: Apply appropriate base coat using the application rates specified in the table below. Allow to dry thoroughly for 24 hours depending on humidity and temperature.
• Top Coat: Apply appropriate top coat in a cross-hatch technique using the application rates specified in the table below. Allow to dry and cure before exposing to foot traffic.
• Standard System: Use the Acrylic System for metal roofs with good slope and no ponding water issues. Use the Solvent System when outdoor temperatures are no longer favorable for acrylic coatings.

 

Acrylic System	Primer	Base Coat	Top Coat
Metal Roofing Light Rust 5-year (20 total mils)	Acrylic Primer 0.50 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.00 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.00 gal. / 100 s.f.
Metal Roofing Light Rust 10-year (30 total mils)	Acrylic Primer 0.50 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.50 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.50 gal. / 100 s.f.
Metal Roofing Heavy Rust 5-year (24 total mils)	MultiService Primer 0.75 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.00 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.00 gal. / 100 s.f.
Metal Roofing Heavy Rust 10-year (32 total mils)	MultiService Primer 0.75 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.50 gal. / 100 s.f.	Acrylic Elastomeric Coating 1.50 gal. / 100 s.f.

Solvent System	Primer	Base Coat	Top Coat
Metal Roofing Light Rust 5-year (22 total mils)	MultiService Primer 0.50 gal. / 100 s.f.	Butyl Rubber Coating 1.50 gal. / 100 s.f.	Butyl Rubber Coating 1.50 gal. / 100 s.f.
Metal Roofing Light Rust 10-year (30 total mils)	MultiService Primer 0.50 gal. / 100 s.f.	Butyl Rubber Coating 2.00 gal. / 100 s.f.	Butyl Rubber Coating 2.00 gal. / 100 s.f.
Metal Roofing Heavy Rust 5-year (24 total mils)	MultiService Primer 0.75 gal. / 100 s.f.	Butyl Rubber Coating 1.50 gal. / 100 s.f.	Butyl Rubber Coating 1.50 gal. / 100 s.f.
Metal Roofing Heavy Rust 10-year (32 total mils)	MultiService Primer 0.75 gal. / 100 s.f.	Butyl Rubber Coating 2.00 gal. / 100 s.f.	Butyl Rubber Coating 2.00 gal. / 100 s.f.
Metal Roofing Heavy Rust 10-year (18 total mils)	Zinc Primer 0.50 gal. / 100 s.f.		Aluminized Asphalt Coating 2.00 gal. / 100 s.f.

3.05 FIELD QUALITY CONTROL

• Utilize manufacturer’s field services to verify proper installation of the system. Areas that do not meet the minimum standards for application specified herein shall be corrected at the contractor’s expense. Manufacturer’s inspection or verification shall not constitute acceptance of responsibility for any improper application of material.

3.06 CLEANING

• Surfaces not to be coated shall be protected during the application of the system. If protection is not feasible, surfaces shall be restored to their proper condition by cleaning, repairing or replacing.
• In conjunction with the final inspection, all debris, containers, materials and equipment are to be properly removed from the job site. Grounds are to be cleaned undamaged and acceptable to the owner.
• Dispose of all containers in accordance with state and local environmental regulations.
• Reflectivity of coatings may be reduced if roof surface is not cleaned regularly. 3.07

PROTECTION

• Control overspray especially during windy conditions.
• All parking areas adjacent to (within 75 feet ) the work area are to be cleared and roped off.
• Protect work from damage due to subsequent construction activity on the site.
• Roof coatings are not traffic grade. Areas surrounding roof top equipment may be reinforced by embedding PolyScrim fabric and applying a thicker membrane (40 – 50 mils). Walk pads should be used if frequent maintenance traffic is expected.