Modified Bitumen Roof Elastomeric Coating in Dallas, TX

Overview

Modified bitumen roofing uses asphalt that has been reinforced with either APP (atactic polypropylene) or SBS (styrene-butadiene-styrene) polymers, applied in cap sheets that are either torch-welded, self-adhered, or hot-mopped into place. These cap sheets come in granulated or smooth-surface finishes, and each requires a slightly different coating approach to achieve proper adhesion of an elastomeric topcoat.

For granulated cap sheets, we embed loose granules and apply an asphalt-compatible primer before coating, since the mineral surface and underlying asphalt both affect bonding. For smooth-surface modified bitumen, the coating must be paired with a primer engineered to prevent asphalt bleed-through, the same staining and adhesion risk found on BUR roofs, since modified bitumen is fundamentally an asphalt-based product regardless of cap sheet style.

Dallas property owners with modified bitumen roofs choose elastomeric coating restoration to stop UV-driven granule loss, reseal seams at cap sheet laps, and extend the roof's service life well past its original expected lifespan, all while avoiding the cost of re-torching or re-adhering an entirely new cap sheet system across the building.

Modified bitumen cap sheets are common on Oak Cliff's mid-century commercial buildings along Jefferson Boulevard and on the Bishop Arts District's boutique retail storefronts, many of which were re-roofed with torch-applied or self-adhered APP or SBS systems in past decades. Deep Ellum's converted warehouse restaurants and creative offices along Elm Street and Main Street show similar cap sheet installations at rooftop additions and mechanical enclosures. Pleasant Grove's small commercial buildings near Buckner Boulevard also frequently carry granulated modified bitumen roofs showing the granule loss and lap seam separation typical of aging asphalt systems. Coating restoration lets these property owners stop UV degradation and reseal seams without the fire risk and cost of re-torching a new cap sheet.