Roof Coating To Go Over Asphalt Shingles

Designed for exterior use only.

Roof coating to go over asphalt shingles.

Leave the old valley flashing in place and install new over it. Ideal for use on flat and low sloped roofs. The highly reflective glossy finish of gacoflex s20 and s21 silicone roof coatings can help reduce energy costs. In fact most shingles are not designed to handle any type of protective coating.

When their asphalt shingle roof has reached the end of its life most people assume their only option is to strip the roof to bare sheathing before a new roof can be applied. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Apply over pre existing elastomeric roof coatings metal roofs built up roofing mineral cap sheet and weathered single ply membranes epdm hypalon and tpo cpa. Rolled roofing consists of asphalt bound sheets coated with sand like granules.

But unless the sheathing is extensively damaged or the structure can t support the weight of another layer of roofing a better solution is to apply a new layer of shingles right over the old one. Let the first coat dry for 3 4 hours and then apply the second coat. Simply clean all dirt mold and mildew off stir contents in can then roller on with 1 2 nap roller or use a hand pumped sprayer to apply our roof coating for asphalt shingles. Unlike built up or hot mop roofs mineral paper roofs do not require a coating of waterproof membrane.

The term rolled roofing generally refers to a product called mineral paper which builders use as a primary roof covering on sloped residential roofs. This provides added protection against ice dams. Its unique formulation provides excellent durability superior fade resistance and a smooth low sheen that resists cracking peeling and chipping while binding the shingles together to resist wind lift up. A specially formulated 100 acrylic roof coating specifically designed for use on asphalt shingles.

Tear it down to the wood inspect for damage check the structure and bring it up to code. Do not shingle over. There are many types and formulations of roof coatings so it is important to always consult the shingle manufacturer before proceeding with any type of coating. The white colored reflective elastomeric coating used was obviously not suitable for asphalt shingle roofs.

Two coats are recommended since most asphalt shingled roofs that need to be coated are porous and worn out and will tend to absorb the first coat while the second coat leaves a protective surface film that stops shingle granule loss cracking. Not surprisingly the national roofing contractors association nrca does not recommend any type of protective coating be applied to shingle roofs. Arma strongly advises against the application of any type of field applied coating over installed asphalt shingles. It helps seal the hardware.

Put ice shield down where the panels are going to go too.