AFW Waterproof Deck System Specification

Inspection

• ¨Plywood decks must be at least 3/4” ACX grade with finish side up. The deck should be tongue and groove and properly blocked and nailed (glued & screwed is best) to meet local building codes.
• Plywood shall have a maximum span of 16”.
• Slope must be a minimum of 1/4” per linear foot.

Deck Preparation

• Be sure the surface is clean, dry and free of grease, paint, oil, dust or curing agents.
• Concrete should be cured a minimum of 28 days prior to installation and should be profiled to resemble 60 grit sandpaper.

Metal Flashing

1. Flash wall-to-deck with 4” x 4”, fascia with 2” x 4” minimum 26 gauge bonderized sheet-metal overlapped at least 4” and caulked in front and back with an Americrete approved sealant.
2. If the flashing is not bonderized it must be etched or roughed up so that the coating will bond.
3. Nail all flashing every 4”. Smooth uneven surfaces with AFW Texture, A-2077 Texture, Americrete Concrete Patch, or Americrete approved Urethane Caulking.

Primer Requirements

• Clean all surfaces and roughen all glossy surfaces by sanding. Remove all peeling, loose or blistered material by scraping and wire brushing. Remove all chlorinated rubber and hydrocarbon finishes by sandblasting.
• Clean all surfaces thoroughly with a T.S.P. Solution and then rinse thoroughly with water.
• The surface must be primed using A-2075 Primer at a coverage rate of 200-300 square feet per gallon.
• Drying time is 30 minutes, re-coat 2 hours.

Plywood Joints/Concrete Seams and Cracks

1. Cracks or seams should be cleaned out, dry and free of debris. Apply Americrete approved Polyurethane Caulk in all plywood seams and Americrete seam tape, A-1620 (self-adhering).

• A-1620 Seam Tape (self-adhering) should be laid out over all cracks, seams and plywood joints.
• Apply A-2077 Texture into the tape with a trowel or putty knife to cover seam tape and all imperfections in plywood sheeting. Allow drying to tack free before laying fiberglass.
• Multiple applications may be necessary.

Crickets/Sloping

1. Sloping should always be done in the framing or in the concrete subsurface. This is the responsibility of the building owner and not the deck coating applicator. If sloping is requested, it should be noted on the work order.
2. The applicator along with the manufacturer should not be held responsible for the outcome of these remedial measures to help correct these pre-existing slope conditions.

Crickets

(reverse slope to divert water to drain) may be installed and sloping may be done using Americrete Concrete Patch. When building up over concrete it must be rough enough to bond (see deck preparation).

Application of Optional Slurry Coat/Concrete Decks

• If the surface is uneven or if there are imperfections that require additional smoothing or feathering, you may apply a slurry coat.
• The slurry coat is made of 1 bag of A-900 and 1 gallon of Water. Slowly blend the bag into the liquid using a slow RPM drill and a jiffy mixer. Using a trowel, smooth overall uneven surfaces completely.
• For best results, slurry coat the entire deck area, stopping only at seams. Using a wet paintbrush to smooth all edges. When the slurry is dry, scrape or sand to smooth any rough spots.

Application of Fiberglass/Base Coat Resin (A-2076)

1. Fray all outside edges of the fiberglass to ensure penetration of the base coat resin.
2. Position fiberglass over the entire area to be covered butting the seams together.
3. Pour the A-2076 base coat resin on top of the fiberglass, completely saturating it using pressure from a 3/4” nap roller. Coverage is at 45 square feet per gallon.
4. After saturating fiberglass, immediately roll entire area with an aluminum fiberglass roller to eliminate air bubbles and wrinkles.
5. After the surface is dry, cut out any bubbles and apply Life Deck 1577 to smooth out any imperfections. Sand or scrape patches to smooth.

Texture Coat (A-2077) Roll or Trowel

• The texture may be rolled with a carpet texture roller 80-90 sq ft per gallon.
• Texture can be troweled smooth, to achieve the desired finish.
• Make sure to “cut in” all edges with a paintbrush ahead of rolling or troweling.

Note: An excellent texture can be achieved using a loop roller by applying the texture at 60 sq ft per gallon. Roll first in one direction, then immediately roll again in the opposite direction. This technique will completely hide the fiberglass.

Caution: when applying at a rate of 80 sq ft per gallon, the temperature must be at least 70 degrees and humidity lower than 30% for 6 hours.

Application of Top Coat (A-1150 Cool Pool) or (A-1150)

1. Mix all containers of the Top Coat to ensure consistent color. Product may be thinned by adding 1 pint of water per gallon to avoid streaks, especially in hot weather.
2. Roll two thin applications of Top Coat using a 3/8”-1/2” roller at a rate of 200-300 square feet per gallon. Spread the Top Coat in two directions to achieve a uniform finish. Coverage will vary according to texture. Do not apply two coats in the same day.
3. Allow 8 to 12 hours of drying time before permitting light pedestrian traffic. For best results, allow curing 24 hours before direct traffic is permitted.
4. Allow an additional 24 hours before heavy objects are placed on the surface.