A built-up roofing system is a multi-ply commercial roofing assembly designed for flat and low-slope roofs.
A typical BUR includes:
A base sheet secured to the roof deck
Several layers of bitumen (hot asphalt or cold-applied adhesive)
Multiple ply sheets of fiberglass or roofing felts
A protective cap sheet, mineral surface, or aggregate top layer
This creates a thick, redundant roof membrane that delivers exceptional waterproofing, fire resistance, and resilience against foot traffic — a major advantage on Phoenix commercial roofs where rooftop equipment is common.
Complete multi-ply built-up roofing systems designed for flat and low-slope commercial roofs, including system design, base sheet installation, ply layers, bitumen application, and final surfacing.
Full removal of aging or failing BUR membranes, substrate repairs, structural corrections, and installation of a new built-up roofing assembly built for long-term performance.
Cost-effective restoration options including additional plies, reinforcing layers, BUR overlays, new cap sheets, and protective surfacing to extend lifespan without a full replacement.
Focused commercial roof repairs for leaks, blistering, flashing failures, and membrane damage — plus elastomeric and reflective coating applications to improve UV protection and energy efficiency.
At Capstone Roofing, we install, repair, and restore built-up roofing for commercial and industrial buildings throughout Phoenix, including Tempe, Glendale, Mesa, Chandler, Scottsdale, Peoria, Avondale, and neighboring areas.
That’s why a built-up roofing system is such a strong fit. Its multiple layers of bitumen and reinforcing fabrics help it outperform thin membranes in demanding climates.
Commercial flat roofs in Phoenix take a beating. The intense desert sun can dry out and crack roofing membranes, and monsoon storms push water into any weak point they can find. Many buildings also deal with areas where water tends to sit, which slowly breaks down seams over time. Add in constant foot traffic from HVAC techs and maintenance crews, and it’s easy to see why lighter, single-layer systems struggle here.
Built-up roofing handles these conditions extremely well because it’s built in layers. Even if one layer is damaged, the layers beneath it keep the roof protected. A gravel or mineral surface helps shield the roof from harsh UV exposure and improves fire resistance. Many owners also choose to add reflective coatings, which reduce heat absorption and improve energy efficiency. And thanks to its reinforcing fabrics and multiple plies, BUR stands up to heavy rooftop traffic far better than thin membranes.
BUR pricing varies based on:
You’ll receive a clear written estimate, options, and a projected timeline. BUR is often one of the best long-term values for flat commercial roofs due to its low maintenance and extended lifespan.
We inspect the membrane, deck, insulation, drainage, and penetrations.
We specify plies, bitumen type, surfacing, and upgrades based on building needs.
If needed, we remove old materials and repair the substrate.
Applying alternating layers of bitumen and reinforcing plies, followed by protective surfacing.
You receive post-project photos, findings, and warranty details.
We work seamlessly with on-site engineers, property managers, and tenant schedules.
Capstone specializes in commercial roofing systems engineered for long-term building performance.
Get a commercial roofing inspection and detailed project estimate for your Phoenix property.
Call our phone number – (602) 486-0763 – to book a service today.
Or start by contacting us for a free estimate to get started.
Most commercial BUR roofs last 20–30 years, depending on the number of plies, surfacing type, drainage design, and level of maintenance. Adding reflective coatings can extend lifespan even further in high-UV climates like Phoenix.
Not always — it depends on the building. BUR offers thicker, redundant layers that resist punctures and heavy foot traffic. Single-ply offers higher reflectivity and lighter installation. We provide side-by-side comparisons to help determine what fits your property best.
Often yes. If the roof deck and insulation are still sound, we can restore it with:
Blistering is typically caused by trapped moisture or air between plies, excessive heat, or aging materials. Phoenix’s high heat accelerates this process. Professional repairs can stop blisters from spreading and prevent membrane failure.
Costs vary based on roof size, number of plies, surfacing type (aggregate, mineral cap, coating), tear-off requirements, and safety conditions. BUR is generally mid-range priced but offers strong long-term value due to its durability and low maintenance.
BUR is ideal for flat or low-slope commercial roofs, especially buildings with:
