Roof Coating System (Application)

Metal Roofs
EPDM Membrane Roofs
Asphalt Roofs
Trailer Roofs

 

Metal Roof

Section I - Preparation

1.01. Substrate

A. The substrate shall be in stable, suitable condition. Loose trim, flashing , and panels shall be refastened so as to not affect the completed job. Existing asphalt repairs and exposed caulking should be removed. Any holes, cracks and weak areas should be repaired with the appropriate metal patch and fasteners.

1.02. Surface Cleaning

A. The surface shall be clean of dirt, dust, oil, grease, caulking, failed or flaking previous coating, etc.

1. Clean using high pressure water of 3000 lb psi minimum.

2. Use Sealmark C-11 cleaner, trisodium phosphate or similar, rinsing well to remove any residue.

3. Some Hi-gloss enamels may require deglossing by mechanical means. NOTE: It is important when applying over all other coatings to first determine compatibility.

4. Remove all silicone caulking to bare metal.

Section II - Surface Corrosion

2.01. Scaling rust shall first be removed by scraping and mechanical wire brushing. A two coat application of Sealmark anti-corrosive rust converter shall then be applied to the rusted surface at a minimum coverage rate of 250 square feet per gallon, per coat. All corrugated rusting panel areas, fasteners and roof penetrations will be treated.

Section III - Reinforcement

3.01. Fasteners, Seams, and Joints

A. Fasteners

1. Replace any corroded, stripped, or missing fasteners. Stripped fasteners shall be replaced with one of a larger size. Tighten remaining fasteners and install others as needed so all seams are tight. Seal with a heavy coat of Sealmark acrylic coating.

B. Seams

1. Polyester cloth option.

a. Caulk seam joint with Sealmark caulking.

b. After caulk has skimmed over, Sealmark acrylic coating shall be applied at the rate of one gallon per square to an area at least three inches on each side of the caulking bead.

c. A four inch wide strip of polyester cloth is embedded into the base coat of Sealmark centered over the joint. A brush or roller shall be used in the embedding process.

NOTE! Do not stretch or pull cloth as to create voids or wrinkles in cloth. The polyester cloth shall conform to the panel profile with no voids or gaps. Over lap cloth a minimum of three inches where required. A second coat of Sealmark will then be applied to the embedded polyester cloth extending the coating two inches on each side of the cloth. The rate of coverage will be 75 lineal feet per gallon.

2. Sealmark Self Stick Polyester Cloth

a. Center self stick cloth over center of joint. Remove backing paper and apply. NOTE! Do not stretch polyester cloth.

3. After self stick polyester cloth is properly applied then roll with three inch rubber roller using firm hand pressure.

4. Top coat polyester cloth with Sealmark coating at the rate of 75 lineal feet per gallon extending coating two inches beyond the edge of the cloth. Do not stick tape directly to polyester fabric. Coat with Sealmark allow to dry two hours then over lap tape. Over lap cloth a minimum of three inches where required.

C. Vertical Panel Laps

1. Apply Sealmark acrylic caulking to all joint areas at the rate of 400 lineal feet per gallon. Use a small brush to smooth and work coating into joint. Note! For ten year labor warranted roof systems northern areas where ice build up is prevalent it will be required to strip in eight feet from roof edge with polyester cloth.

D. Joints

1. Any joints and metal patches are to be addressed as per Section III B.

Section IV - Sealmark Ceramic Fortified Acrylic Top Coat

4.01. Method

A. The all important finial coat application shall be Sealmark Ceramic Fortified Acrylic Coating applied by brush, roller, or sprayed over the entire roof surface. A minimum coverage rate of 1.7 gallons per 100 square feet.

B. The Sealmark coating shall be applied to a clean, dry surface prepared surface in a one or two coat application. A 1.7 gallon per square foot coverage rate will yield a 20.5 mil wet film and a 15.2 mil dry thickness. Job condition will determine the appropriate application method. NOTE! It is recommended that a two coat application be used to eliminate the rib shadowing effect that is common in spray applications.

CAUTION! Do not apply Sealmark products when rain or moisture is imminent. Do not apply if air temperature is below 50 degrees and freezing is expected with in 24 hours of application. It is necessary for Sealmark to fully cure before the introduction of moisture or contact takes place. Dispose of all containers as per state, federal, or local regulations. Keep away from children. If swallowed contact a physician immediately.

NOTICE! THE GUIDELINES FOR INSTALLING SEALMARK ACRYLIC ROOF COATING ON METAL ROOFS ARE FOR GENERAL USE. SPECIFIC JOB CONDITIONS MAY NECESSITATE CHANGES FROM THE DIRECTIONS OUTLINED HEREIN. CONSULT SEALMARK REGARDING UNUSUAL JOB CONDITIONS NOT COVERED BY THESE GUIDELINES.

 

EPDM Membrane Roofs

Section I - Preparation

1.01. Substrate

A. The substrate shall be in stable, suitable condition. Loose trim, flashing, laps and holes shall be repaired as per membrane manufacturer's written instructions. All heavy dirt and debris is to be removed from roof. NOTE: DO NOT USE ANY LAP SEALANT ON REPAIRS

1.02. Roof venting

A. Install a good quality roof vent as per membrane manufacturer's instructions. Install one vent per 1200 square feet of roof surface. NOTE! Do not use any lap sealant in installation

1.03. Surface cleaning

A. The surface shall be clean of dirt, dust, oil, grease, caulking, failing or flaking previous cleaner/primer

1. Clean all surface that are to receive Sealmark Coating with Sealmark C-11 cleaner/primer

a. Starting at the high point of the roof fog surface with clean water to cool surface then apply C-11 cleaner with low pressure spray at the rate of one gallon per 250 square feet. We recommend doing an area of 50 X 50 at a time. Let C-11 dwell on surface five minutes then begin scrubbing with a power floor scrubber with a synthetic scrub pad. Clean flashing and other vertical surfaces with a hand scrub pad. After scrubbing to ten square foot area, rinse with clean water. Continue to clean roof surface as per above spec.

b. After surface has dried check for unclean areas. Spot clean if necessary.

Section II - Field Seam and Flashing Reinforcement

2.01. Field seams and existing EPDM repairs

A. A base coat of Sealmark acrylic coating shall be appliedat the rate of 75 lineal feet per gallon to an area at least three inches on each side of the seam edge.

B. A four inch wide strip of Sealmark polyester cloth is embedded in the base coat centered over the edge using a brush or roller. The polyester cloth shall lay flat with no wrinkles, voids or gaps. Overlap the cloth a minimum of three inches where required. A second coat of Sealmark will then be applied to the embedded polyester cloth extending the coating two inches on each side of the cloth. The coverage rate will be 100 lineal feet per gallon.

2.02. Flashing

A. All uncured EPDM and neoprene membrane flashing shall be reflashed with Sealmark acrylic coating and polyester cloth as per section 2.01. the use of a large sheet of polyester may be required. All polyester cloth shall extend three inches beyond the flashing edge lap.

B. All gravel stop and edge metal shall be stripped in as per 2.01. The polyester cloth shall extend three inches on to roof surface and on to the gravel stop beyond the rubber membrane. Strip in all joints with Sealmark and polyester cloth per 2.01

Section III - Sealmark Ceramic Fortified Acrylic Top Coat

3.01. Method

A. The all important final coat application shall be Sealmark Ceramic Fortified Acrylic Coating applied by brush, roller, or sprayed over the entire prepared roof surface. A minimum coverage rate of 2.5 gallons per square or 34 mil wet film

B. Aply Sealmark in a two coat application. First coat of Sealmark shall be applied at the rate of one gallon per sqaure or 14 mil wet film. Allow first coat to dry minimum of two hours then apply second coat at the rate of 1.5 gallon per square or 20 mil wet film. NOTE! Use the cross hatch method when applying first and second coats.

3.02. Special Instructions

A. Where ponded water conditions exist (standing water for more than 48 hours) an additional coat of Sealmark shall be applied at the rate of one gallon per square. Sealmark coating shall extend 16 inches beyond the ponding area. CAUTION! Do not apply Sealmark products when rain or moisture is imminent. Do not apply if air temperature is below 50 degrees and freezing is expected within 24 hours or application. It is necessary for Sealmark to fully cure before the introduction of moisture or contact takes place. Dispose of all containers as per state, federal or local regulations. Keep out of reach of children.

 

Non Aggregate Asphalt Roofs

Section I - Preparation

1.01. Substrate

A. The substrate shall be in stable, suitable condition, and aged for 5 years. Loose trim, flashing, laps, and holes shall be repaired using standard roofing methods and with Sealmark acrylic products. Do not use any petroleum base roof products on any repairs.

1.02. Roof Venting

A. Install a good quality roof vent as per manufacture's instructions. Install one vent per 1200 square feet of roof surface. NOTE! Do not use any petroleum base roof products on any repairs.

1.03. Surface Cleaning

A. The surface shall be clean of dirt, dust, oil, grease, caulking, failed or flaking previous coating, etc.

1. Clean all surfaces that are to receive Sealmark Coating with a stiff bristle brush and Sealmark C-11 cleaner/primer or with a 2000 psi pressure washer.

2. After surface has dried check for unclean areas. Spot clean if necessary. All oil, grease and fresh roof cement must be removed.

Section II - Roof Penetrations & Reinforcement

2.01. Roof Penetrations

A. A base cost of Sealmark acrylic roof coating is to be applied around the penetration. Then embed Sealmark polyester fabric in wet coating, free of wrinkles and dry spots. Fabric to extend 6" above and 6" from the base of the penetrations. Top coat the embedded fabric with Sealmark acrylic roof coating.

2.02. Wall Flashing

A. All wall flashing will be reflashed with Sealmark acrylic coating and polyester fabric as per section 2.01. The use of a large sheet of polyester cloth may be required. Then coat the entire parapet wall and wall cap with Sealmark acrylic roof coating at the rate of 100 square feet per gallon.

NOTE! Strip in all joints in metal or stone cap with reinforcing fabric and Sealmark coating.

B. All gravel stop and edge metal shall be stripped in as per 2.01. The polyester cloth shall extend three inches on to roof surface and on to the gravel stop. Strip in all joints with Sealmark and polyester cloth as per 2.01.

Section III - Sealmark Ceramic Fortified Acrylic Top Coat.

3.01. Method

A. Starting at the low point of the roof, apply Sealmark roof coating at the rate of 2.5 gallons per 100 square feet.

B. Immediately embed Sealmark reinforcing fabric and roll into wet coating brooming out all air pockets and wrinkles. Overlap all fabric 4" onto next roll and previously installed flashing fabric.

C. Top coat embedded fabric with Sealmark acrylic coating at the rate of 1.5 gallons per 100 square feet.

NOTE! Use the cross hatch method when applying first and second coats.

3.02. Special Instructions!

A. Where ponding water conditions exists (standing water for more than 48 hours) and additional coat of Sealmark shall be applied at the rate of one gallon per square. Sealmark Coating shall extend 16 inches beyond the ponding area.

CAUTION! Do not apply Sealmark products when rain or moisture is imminent. Do not apply if air temperature is below 40 degrees and freezing is expected with 24 hours of application. It is necessary for Sealmark to fully cure before the introduction of moisture or contact takes place. Dispose of all containers as per state, federal, or local regulations. Keep out of the reach of children

B. Allow 14 days of curing before covering the surface with earth.

NOTICE! THE GUIDELINES FOR INSTALLING SEALMARK ON NON AGGREGATE ASPHALT ROOFS ARE FOR GENERAL USE. SPECIFIC JOB CONDITIONS MAY NECESSITATE CHANGES FROM THE DIRECTIONS OUTLINED HEREIN. CONSULT SEALMARK REGARDING UNUSUAL JOB CONDITIONS NOT COVERED BY THESE GUIDELINES.

 

Trailer Roof

1. Power wash surface with 2000 PSI pressure or scrub with a stiff brush and Sealmark cleaner to remove all contaminates, loose caulking, and roof cement.

2. If rust is present apply Sealmark rust inhibitinh primer.NOTE: Heavy pitted rust will require two coats of Sealmark rust primer.

3. Apply Sealmark brush grade caulk over seam area and the base of all roof penetrations. Sealmark caulk shouldbe applied at 3/16 minium thickness.

4. After Sealmark caulk has dried brush a coat of Sealmark roof coating over caulked area.

5. Any holes or cracks are to be repaired by embedding Sealmark polyester cloth into Sealmark brush grade caulk then top coat with Sealmark roof coating.

6. Spray or roll a top coat of Sealmark coating over trailer roof at the rate of 75 square feet per gallon.

NOTE: Brush or roller application will require two coats to attain the proper mil thickness.

NOTICE! THE GUIDELINES FOR INSTALLING SEALMARK ON A TRAILER ROOF ARE FOR GENERAL USE. SPECIFIC JOB CONDITIONS MAY NECESSITATE CHANGES FROM THE DIRECTIONS OUTLINED HEREIN. CONSULT SEALMARK REGARDING UNUSUAL JOB CONDITIONS NOT COVERED BY THESE GUIDELINES.