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Modified bitumen & BUR roof coating

Asphalt-based roofs crack, blister and dry out under Colorado sun. A modified bitumen roof coating seals the surface and protects what's left of the asphalt.

Conditions we see on mod-bit and built-up roofs

Alligatoring

A cracked, scaly surface where the asphalt has dried out from UV exposure.

Blisters

Trapped moisture or air lifts the membrane into bubbles that can split open.

Open laps and seams

Torch-down and cold-applied seams can separate as the roof ages.

Granule loss

Bare spots on cap sheets leave the asphalt exposed to sun and weather.

Failing flashings

Base flashings at walls and curbs are a common source of leaks.

Good candidates for coating

✓

Deck is structurally sound

✓

Insulation is mostly dry

✓

Blisters and cracks are localized

✓

Drainage works or can be improved

Signs replacement may be needed

✓

Widespread wet insulation

✓

Soft or deteriorated deck

✓

Multiple existing roof layers

✓

Membrane split across large areas

Flat roof with red primed field and white-coated seams around rooftop vents

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Where the work happens

Repair areas on a typical job

1

Primed field: the roof is primed so the coating bonds.

2

Seams: every lap is treated before the topcoat.

3

Penetrations: vents and curbs are detailed by hand.

Build note: upgrade to the Elementor Pro Hotspot widget if preferred.

Crew applying red primer and white seam treatment on a commercial flat roof
Featured project

Seam and primer prep on an asphalt roof

Crews primed the field and treated every seam before coating.

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Get a mod-bit or BUR roof assessment

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