Specifications: Part 2 - Systems
Preparation of Substrates for Weather Barrier
Roofing Systems
2.01 Flat Roof (Ponded Water)
Surface Preparation: Roof surface should be dry, and free of dirt, mildew or any other contamination that may inhibit proper adhesion. Applicator shall make every effort to mechanically eliminate all ponding water areas on the roof prior to application of Weather Barrier products (“ponding water” is defined as water that does not properly drain and remains for more than 48 hours). Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1850 Primer Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply one coat of Liquid EPDM at 50 square feet per gallon.
- Optionally, apply a second coat of Weather Barrier Liquid EPDM at a rate of 50 square feet per gallon (note: first coat of Liquid EPDM must be solvent washed with Xylene or similar solvent to promote intercoat adhesion)
2.02 Positive Slope Roofs
2.02a Metal Corrugated
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose, flaking or powdery rust by wire brushing if it has not been removed during pressure washing. All cleaned rust areas must be treated with Weather Barrier 5003 Rust Inhibiting Primer to prevent further deterioration of the metal. All rust must be completely covered by the Weather Barrier 5003. After spot treatment of the cleaned rusted areas, a full coat of Weather Barrier 5003 Rust Inhibiting Primer should be applied to the entire surface. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02b Metal Standing Seam
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose, flaking or powdery rust by wire brushing if it has not been removed during pressure washing. All cleaned rust areas must be treated with Weather Barrier 5003 Rust Inhibiting Primer to prevent further deterioration of the metal. All rust must be completely covered by the Weather Barrier 5003. After spot treatment of the cleaned rusted areas, a full coat of Weather Barrier 5003 Rust Inhibiting Primer should be applied to the entire surface. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02c Metal Aged Copper
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose, flaking or powdery rust by wire brushing if it has not been removed during pressure washing. All cleaned rust areas must be treated with Weather Barrier 5003 Rust Inhibiting Primer to prevent further deterioration of the metal. All rust must be completely covered by the Weather Barrier 5003. After spot treatment of the cleaned rusted areas, a full coat of Weather Barrier 5003 Rust Inhibiting Primer should be applied to the entire surface. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
2.02d Built Up Roof - Asphalt
NRCA recommends coating this roof surface to prolong the life of the roof
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove loose dirt, gravel and other surface contaminants by sweeping, vacuuming or power blowing. Gravel removal is most easily done when the asphalt is cool. Scrape or scarify heavily graveled roofs. Embedded gravel reduces normal coverage rates. New asphalt surfaces must weather and become dull, usually 6 to 12 months before coating. Replace wet insulation and any loose, curled or deteriorated roofing. All blisters should be properly treated prior to application of roof coating. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02e Built Up Roof - Modified Bituminous
NRCA recommends coating this roof surface to prolong the life of the roof
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove loose dirt, gravel and other surface contaminants by sweeping, vacuuming or power blowing. Gravel removal is most easily done when the asphalt is cool. Scrape or scarify heavily graveled roofs. Embedded gravel reduces normal coverage rates. New asphalt surfaces must weather and become dull, usually 6 to 12 months before coating. Replace wet insulation and any loose, curled or deteriorated roofing. All blisters should be properly treated prior to application of roof coating. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02f EPDM Rubber Roof
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose dirt, and other surface contaminants by sweeping, vacuuming or power blowing. Good surface preparation is critical to coating system performance. New EPDM Rubber must weather 6 to 12 months before applying Weather Barrier coatings. Blisters must be properly treated and loose or curled seams must be cut or glued down. Wash roof with Xylene or MEK to remove chalk. Allow roof to dry before coating. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply Weather Barrier Liquid EPDM at a rate of 55 - 60 linear feet per gallon to seams. Embed WB403 mesh into the Liquid EPDM while wet and smooth out the Liquid EPDM
- Apply one coat of Weather Barrier Liquid EPDM at a rate of 50 square feet per gallon.
- Optionally, apply a second coat of Weather Barrier Liquid EPDM at a rate of 50 square feet per gallon (note: first coat of Liquid EPDM must be solvent washed with Xylene or similar solvent to promote intercoat adhesion).
2.02g Built Up Roof - Aluminum
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove loose dirt, gravel and other surface contaminants by sweeping, vacuuming or power blowing. Gravel removal is most easily done when the asphalt is cool. Scrape or scarify heavily graveled roofs. Embedded gravel reduces normal coverage rates. New asphalt surfaces must weather and become dull, usually 6 to 12 months before coating. Replace wet insulation and any loose, curled or deteriorated roofing. All blisters should be properly treated prior to application of roof coating. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02h Built Up Roof - Previously Painted Surfaces
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove loose dirt, gravel and other surface contaminants by sweeping, vacuuming or power blowing. Gravel removal is most easily done when the asphalt is cool. Scrape or scarify heavily graveled roofs. Embedded gravel reduces normal coverage rates. New asphalt surfaces must weather and become dull, usually 6 to 12 months before coating. Replace wet insulation and any loose, curled or deteriorated roofing. All blisters should be properly treated prior to application of roof coating. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply two coats of 1650 Seamless Elastomeric at 100 square feet per gallon per coat.
Alternate System:
- Apply one coat of Weather Barrier 1850 Primer/Sealer at 400 square feet per gallon.
- Apply 2 coats of 1655 Elastomeric Roof Coating at 100 square feet per gallon per coat.
2.02i Sprayed in Place Polyurethane Foam (SPF)
Surface Preparation: SPF has very poor exterior weathering properties and must be coated with Weather Barrier Roof Systems within 24 hours of new foam application. The foam must be dry before applying Weather Barrier Roof Systems.
Contact Weather Barrier Technical Department for recommendations on coating pre-existing uncoated SPF roofs.
SYSTEM (33.2 mils DFT):
- Apply two coats of Weather Barrier 2000 Rain Coat at 50 square feet per gallon per coat.
Alternate System: (31.2 mils dft):
- Apply one coat of 1530 Roof/Deck Membrane at 100 square feet per gallon.
- Apply two coats of Weather Barrier 2000 Rain Coat at 75 square feet per gallon per coat.
2.02j Wood Roofing (Also Siding Shingles & Shakes)
Surface Preparation: All surfaces to be coated with the Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose dirt, dust, oil, grease, and other surface contaminants that could effect adhesion, by sweeping, sanding, power blowing. If mildew is present, remove completely by sterilizing the surface with mildew remover and detergent. Rinse well and allow to dry before painting.
System:
- Apply 2 coats, wet on wet, of Weather Barrier CWF-UV at 150-350 square feet per gallon (depending on wood porosity & method of application, see technical data sheet).
2.02k Fiberglass
Consult Weather Barrier Technical Service Department
2.03 Roof Gutters
2.03a Metal
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose, flaking or powdery rust by wire brushing if it has not been removed during pressure washing. All cleaned rust areas must be treated with Weather Barrier 5003 Rust Inhibiting Primer to prevent further deterioration of the metal. All rust must be completely covered by the Weather Barrier 5003. After spot treatment of the cleaned rusted areas, a full coat of Weather Barrier 5003 Rust Inhibiting Primer should be applied to the entire surface. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of Liquid EPDM at 50 square feet per gallon / per coat.
- Optionally, apply a second coat of Weather Barrier Liquid EPDM at a rate of 50 square feet per gallon (note: first coat of Liquid EPDM must be solvent washed with Xylene or similar solvent to promote intercoat adhesion).
2.03b Concrete
Surface Preparation: All surfaces to be coated with Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose dirt, gravel and other surface contaminants. Concrete surfaces must be fully cured.
System:
- Apply one coat of 1850 Primer Sealer at 400 square feet per gallon.
- Apply one coat of Liquid EPDM at 50 square feet per gallon.
- Optionally, apply a second coat of Weather Barrier Liquid EPDM at a rate of 50 square feet per gallon (note: first coat of Liquid EPDM must be solvent washed with Xylene or similar solvent to promote intercoat adhesion).
2.04 Roof / Deck Systems
2.04a Wood
Surface Preparation: All surfaces to be coated with the Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose dirt, dust, oil, grease, and other surface contaminants that could effect adhesion, by sweeping, sanding, power blowing. If mildew is present, remove completely by sterilizing the surface with mildew remover and detergent. Rinse well and allow to dry before painting. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1850 Primer Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity). Embed polyester mesh into this coat.
- Apply a second coat of 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity).
2.04b Concrete
Surface Preparation: All surfaces to be coated with the Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose dirt, dust, oil, grease, and other surface contaminants that could effect adhesion, by sweeping, sanding, power blowing. If mildew is present, remove completely by sterilizing the surface with mildew remover and detergent. Rinse well and allow to dry before painting. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1850 Primer Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity). Embed polyester mesh into this coat.
- Apply a second coat of 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity).
2.04c Previously Coated
Surface Preparation: All surfaces to be coated with the Weather Barrier Roofing Systems must be pressure washed clean, dry and sound. Remove all loose and peeling coatings, dirt, dust, oil, grease, and other surface contaminants that could effect adhesion, by sweeping, sanding, power blowing. If mildew is present, remove completely by sterilizing the surface with mildew remover and detergent. Rinse well and allow to dry before painting. Refer to section 1.09 for treatment of Seams, Fasteners and Flashing repair.
System:
- Apply one coat of 1850 Primer Sealer at 400 square feet per gallon.
- Apply one coat of 1530 Roof/Deck Membrane at 75 square feet per gallon.
- Apply 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity). Embed polyester mesh into this coat.
- Apply a second coat of 5001 Elastomeric Deck finish at 150 or 250 square feet per gallon (depending on porosity).
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