Surface Preparation
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Begin by scraping off loose previous coating.
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Next, clean the roof surface THOROUGHLY by scrubbing with a mixture
of water and commercial TSP (Trisodium Phosphate) solution to remove dirt, oils
and grease. You can purchase TSP at most retailers with a paint department. This
will ensure proper bonding of the coating to the surface.
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Before coating begins, roof surface should be checked with tape to see if it is
really clean. If the tape pulls off tight and evenly, the surface is clean. If
the tape pulls off easily, with loose material filling the area, it needs more
cleaning.
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Check for mildewed areas and remove mildew by treating the
area with chlorine bleach. Rinse thoroughly and let dry.
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Where ponded water exists beyond 3 days, roof drains or
other corrective measures must be taken to eliminate water build-up.
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Inspect flashing around vents, stacks, chimneys, and air
conditioners for splitting and damage to roof surfaces. It is important to
repair these areas and seal seams to prevent leaks and create a watertight
repair. (See the easy 3-step application process for either
Elastomeric or Aluminum Coating Systems. If you
are uncertain which system to use, check our Roof Type guide.)
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