Builtup Roof
I. PRODUCTS
1.01 FIXALLROOF RESTORATION SYSTEM
• The elastomeric roofing system for builtup roofing is either a rolled or spray-applied roof coating supplied by epdm coatings.
| Product | Acrylic System | Solvent System |
|
PrimeLock Primer |
||
|
Seam Products |
||
|
Base Coat / Top Coat |
1.02 PRODUCT SUBSTITUTIONS
• For quicker repairs, use SeamStitch Butyl Tape or Eternabond WebSeal in lieu of PrimeLock and PolyScrim when sealing seams, flashings and penetrations.
• Use Butyl Rubber Coating instead of PrimeLock Bonding Primer as the adhesive for PolyScrim when installing the Solvent Based System.
1.03 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.
1.04 EQUIPMENT
• Visit the epdmcoatings website for recommended spray equipment guidelines, or consult the spray equipment manufacturer directly.
II. EXECUTION
2.01 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.
2.02 EXAMINATION
• Verify conditions are acceptable for application of roof restoration system.
• Inspect builtup roof to receive roof coating and make sure they are clean, sound, properly prepared and free of moisture, dirt, debris or other contaminants.
• A comprehensive moisture survey is to be conducted to locate and identify areas of trapped moisture and saturated insulation.
• 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.
2.03 PREPARATION
• Cleaning: The entire builtup roof ( BUR ) 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.
• Ponding Water: Contractor shall make every effort to mechanically eliminate all ponding water areas on the builtup 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: Wet roof insulation and damaged membranes are to be removed and replaced as necessary to match existing specified material. All ponds that hold water over 1″ for more than 48 hours should be mechanically diverted.
• Do not apply coatings until all unsatisfactory conditions have been corrected in a manner acceptable to the original builtup roofing manufacturer.
2.04 APPLICATION
• Inspect builtup roof to receive roof coating. Always perform a coating adhesion test before doing the entire job.
• Primer: Entire builtup 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.
• Cracks/Splits: Repair all cracks and splits using the same method as seam preparation above. If cracks and splits are all over the builtup roof , a full fabric system will be necessary.
• Blisters: All blisters must be cut out and inspected for moisture content. Cut area must be thoroughly dry before applying any roof coating. Use the same repair procedure for seams.
• Base Coat: Apply appropriate base coat using the application rates specified in the table below. Allow to dry thoroughly for 8 – 12 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 builtup roofs with good slope and no ponding water issues. Use the Solvent System for builtup roofs with minor ponding issues or when outdoor temperatures are no longer favorable for acrylic coatings.
| Acrylic System | Primer | Base Coat | Top Coat |
|
BuiltUp Roofing Standard System 5-year (32 total mils) |
PrimeLock Bonding Primer 0.65 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.50 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.50 gal. / 100 s.f. |
|
BuiltUp Roofing Standard System 10-year (40 total mils) |
PrimeLock Bonding Primer 0.65 gal. / 100 s.f. |
Acrylic Elastomeric Coating 2.00 gal. / 100 s.f. |
Acrylic Elastomeric Coating 2.00 gal. / 100 s.f. |
| Solvent System | Primer | Base Coat | Top Coat |
|
BuiltUp Roofing Standard System 5-year (24 total mils) |
PrimeLock MultiService Primer 0.75 gal. / 100 s.f. |
Butyl Rubber Coating 1.75 gal. / 100 s.f. |
Butyl Rubber Coating 1.75 gal. / 100 s.f. |
|
BuiltUp Roofing Standard System 10-year (30 total mils) |
PrimeLock MultiService Primer 0.75 gal. / 100 s.f. |
Butyl Rubber Coating 2.25 gal. / 100 s.f. |
Butyl Rubber Coating 2.25 gal. / 100 s.f. |
• Acrylic Fabric Reinforced System: PolyScrim fabric should be installed on the entire builtup roof surface. Apply a thin coat of PrimeLock Bonding Primer on the builtup roof surface, roll out 40″ PolyScrim fabric making sure there are no air pockets and the fabric lays as flat as possible. Apply another coat of PrimeLock Bonding Primer to totally saturate the fabric. Overlap edges of PolyScrim fabric at least 4″.
| Acrylic System | Primer | Base Coat | Top Coat |
|
BuiltUp Roofing Reinforced System 5-year (40 total mils) |
PrimeLock Bonding Primer 2.00 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.25 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.25 gal. / 100 s.f. |
|
BuiltUp Roofing Reinforced System 10-year (44 total mils) |
PrimeLock Bonding Primer 2.00 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.50 gal. / 100 s.f. |
Acrylic Elastomeric Coating 1.50 gal. / 100 s.f. |
• Solvent Fabric Reinforced System: PolyScrim fabric should be installed on the entire builtup roof surface. Prime the entire roof with PrimeLock MultiService Primer. Apply a thin coat of Butyl Rubber Coating on the roof surface, roll out 40″ PolyScrim fabric making sure there are no air pockets and the fabric lays as flat as possible. Apply another coat of Butyl Rubber Coating to totally saturate the fabric. Overlap edges of PolyScrim fabric at least 4″.
| Solvent System | Primer | Base Coat | Top Coat |
|
BuiltUp Roofing Reinforced System 5-year (30 total mils) |
PrimeLock MultiService Primer 0.50 gal. / 100 s.f. |
Butyl Rubber Coating 2.00 gal. / 100 s.f. |
Butyl Rubber Coating 1.75 gal. / 100 s.f. |
|
BuiltUp Roofing Reinforced System 10-year (33 total mils) |
PrimeLock MultiService Primer 0.50 gal. / 100 s.f. |
Butyl Rubber Coating 2.00 gal. / 100 s.f. |
Butyl Rubber Coating 2.25 gal. / 100 s.f. |
2.05 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.
2.06 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.
2.07 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.
·The elastomeric roofing system for builtup roofing is either a rolled or spray-applied roof coating supplied by epdm coatings.
