Roof coating is the process of cleaning and priming a sound roof substrate, then rolling or spraying a reflective membrane across the field, seams, and flashing beads so small failures stop spreading.
Coating suits flat and low-slope assemblies — modified bitumen, built-up roof, TPO, EPDM, and older tar and gravel. A silicone coating handles ponding water. An acrylic coating or acrylic elastomerics need a pitch that drains. A polyurethane coating builds tensile strength over a rough surface.
For a Concord building owner, a recoat costs a fraction of a tear-off and adds years before the rooftop hits end-of-life wear. Most systems go on at a 1.5 to 2 gallon coverage rate per square, with a cure time of 24 to 48 hours in dry weather.
- Primer systems go down first on a chalky or oxidized substrate, because coating will not bond to a surface that is still flaking.
- UV degradation shows as chalking and alligatoring, and it is the main reason a rooftop goes gray within five summers of Concord heat.
- Blistering and seam separation get cut open, packed with mastic or roof cement, then reinforced before the finish coat.
- A parapet, scupper, or roof drain gets its own detail work so water leaves the roof instead of sitting at the roofline.
- Gutter and downspout connections are checked in the same visit — a clogged gutter backs water under the eave and rots the fascia.
- We inspect the roof deck, sheathing, and underlayment from the rooftop, and we tell you when a coating will not hold and a recover or tear-off is the honest answer.
