Flat Roofing Solutions in Oklahoma City, OK

Flat roofing is a category, not a product. Most OKC commercial buildings — and a growing share of modern OKC residential builds — have low-slope roofs that need a flat-roof membrane system rather than the steep-slope shingles a typical residential roof uses. Choosing the right system is a decision that should consider drainage, building use, climate exposure, and ownership horizon together.

• TPO — see TPO Roofing service. Best balance of cost, lifespan, and energy performance.
• EPDM — see EPDM Roofing service. Long-life, hail-tolerant, UV-stable.
• PVC — see PVC Roofing service. Premium, chemical-resistant, longest-life single-ply.
• Modified bitumen — multi-ply built-up system, the legacy commercial choice. Still right for some applications, especially where membrane redundancy is required.
• Liquid-applied systems — for restorations on existing built-up roofs and unusual geometries (curved, multi-penetration) where membrane work is impractical.
• Built-up tar-and-gravel — increasingly rare on new installs but still maintained on legacy buildings.

The single most-failed component on OKC commercial flat roofs isn't the membrane — it's the drainage system. A flat roof actually has 1/4" per foot slope to drains; "flat" is a misnomer. When the drains clog, the slope is wrong, or the building has settled and now ponds water in the wrong areas, no membrane in the world will give you the rated lifespan. Every assessment we do includes a drainage analysis with a hose test to verify drains are flowing, slopes are correct, and ponding areas are identified.

Where existing slope is inadequate, tapered polyiso insulation creates the slope needed for proper drainage during a re-roof. Crickets behind HVAC curbs and other roof obstructions divert water around them rather than letting it pond. These are not optional details — getting them wrong means the new roof fails 5–10 years early.