Instructions / Assembly

Care & Preventative
Maintenance
HydroStop® PremiumCoat® Liquid-Applied Roong (LAR) – Version 1.3
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Temporary Dry Surface Emergency Repairs
• Clean the coating surface around the damaged area using GAF United Cleaning Concentrate.
• Rinse the area with clean water and allow it to dry.
• Apply HydroStop® PremiumCoat® Buer Grade Flashing and embed with fabric as needed to
provide additional strength. Contact GAF Technical Services before any other product is used
to confirm its suitability.
Specific Repairs to Liquid-Applied Roofing Systems over Spray Polyurethane Foam (SPF) Insulation
• Minor breaks in the coating or mechanical damage to sprayed polyurethane foam (SPF)
may be repaired with approved urethane caulk and then top-coated with HydroStop®
PremiumCoat® Buer Grade Flashing with or without fabric. The damaged foam must be
completely cut away prior to repairing. If the repaired area is larger than 2” (51 mm) in
diameter, consult GAF Technical Services for proper repair procedures. Note: If silicone is
used for repair, the area must be filled with Unisil with Unisil Fibers.
• Large blisters that are not leaking but have broken open should be removed and repaired. If
the blister has not broken open, GAF recommends leaving it in place.
Specific Repairs to Liquid-Applied Roofing Systems Not Over Spray Polyurethane Foam (SPF)
Insulation
• Repair minor mechanical damage to the liquid-applied coating membrane with HydroStop®
PremiumCoat® Buer Grade Flashing and/or approved urethane caulk, and then top-coated
with an approved GAF product. The damaged membrane must be completely cut away prior
to repairing. If the repaired area is larger than 2” (51 mm) in diameter, consult GAF Technical
Services for proper repair procedures.
• If the liquid-applied roofing system incorporates reinforcement fabric, then the repair should
use HydroStop® PremiumCoat® Buer Grade Flashing with or without fabric.
ROOF ALTERATIONS
General
GAF must be notified of any planned roof alterations prior to such alterations being made. Coverage
under the guarantee or warranty may be jeopardized if:
• GAF is not notified of alterations.
• The original contractor of record (or another GAF-certified contractor) does not do the
required work.
• Non-GAF products are used.
All alterations must be pre-approved, including but not limited to modifications such as roof-top HVAC
units or other equipment, pipes, satellite dishes, antennas, conduit, general penetrations, skylights,
etc.
NOTE: These maintenance and inspection procedures are provided for guideline use only. Your
GAF-certified contractor or professional roof consultant may provide a more detailed maintenance
program. Maintain records of roof damage and maintenance inspections for each building roof.