Mod Bit Installation
We install one- and two-ply modified bitumen systems with overlapped, fully sealed seams and granulated cap sheets for UV and weather protection.
Mod Bit Roofing Specialists
Modified Bitumen Roofing in Gresham
Modified bitumen roofing offers a flexible, durable solution for flat and low-slope roofs, combining asphalt with rubber or plastic polymers for improved weather resistance. Our modified bitumen roofing services in Gresham cover installation using torch-applied, self-adhered or hot-mopped methods, selected based on your building's specific requirements. This material's flexibility allows it to better withstand temperature fluctuations without cracking, providing excellent waterproofing performance suited to the region's frequent rainfall. Our experienced team also handles repairs for common issues like seam separation, punctures and blistering, restoring the membrane's protective performance quickly and effectively.
With a typical lifespan of 20 to 30 years, modified bitumen offers a reliable middle-ground option between traditional built-up roofing and modern single-ply membranes. Whether for new installation or ongoing maintenance, we deliver dependable modified bitumen roofing solutions built for lasting performance.
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The Basics
What is Modified Bitumen Roofing?
Modified bitumen roofing is a flat or low-slope roofing system made from asphalt reinforced with rubber or plastic polymers, creating a flexible, durable membrane suited to commercial and some residential applications. This modification improves the material's flexibility and weather resistance compared to traditional asphalt roofing, allowing it to better withstand temperature fluctuations without cracking. Installation typically involves torch-applied, self-adhered or hot-mopped methods, offering options depending on budget and building requirements. Modified bitumen roofing provides excellent waterproofing performance, making it well-suited to wetter climates like Gresham where consistent rain protection is essential. With a typical lifespan of 20 to 30 years, it offers a reliable middle-ground option between traditional built-up roofing and modern single-ply membranes. Its flexibility also makes it more resistant to punctures and impact damage. For property owners seeking a durable, weather-resistant flat roofing solution with proven performance, modified bitumen remains a practical and widely used choice.
What We Do
Modified Bitumen Roofing Services in Gresham
Mod Bit Repair
We repair open seams, blisters, punctures, and worn areas, and replace flashing around vents, skylights, and walls where leaks commonly start.
Mod Bit Replacement
For roofs at the end of their life, we remove the old system, repair the deck, and install new insulation and membrane built to drain properly.
Installation
Modified Bitumen Roof Installation in Gresham
Our team installs modified bitumen roofing for Gresham properties seeking a durable, flexible flat roofing solution. Using asphalt reinforced with rubber or plastic polymers, we apply the membrane through torch-applied, self-adhered or hot-mopped methods depending on your building's requirements. This flexible material resists cracking from temperature fluctuations while providing excellent waterproofing performance, important given Gresham's consistent rainfall. Our installation process includes proper insulation, seam sealing and flashing to ensure long-term reliability. Modified bitumen offers a practical middle-ground option between traditional built-up roofing and modern single-ply membranes, and our experienced crews ensure precise application for lasting weather protection.
Repairs
Modified Bitumen Roof Repair in Gresham
Modified bitumen roofing can develop issues like seam separation, punctures or blistering over time, particularly after severe weather exposure. Our repair services address these problems by resealing seams, patching punctures and reinforcing weak areas to restore the membrane's waterproofing performance. We also inspect flashing and drainage systems, as these are common sources of leaks in flat roofing systems. Given Gresham's frequent rainfall, prompt repairs are essential to prevent minor damage from escalating into significant leaks. Our experienced team ensures repairs are completed efficiently, protecting your property while extending the overall lifespan of your modified bitumen roofing system.
Know When to Call
Signs Your Mod Bit Roof Needs Repair
Catching mod bit problems early keeps repairs small. Look for these common signs of wear on your low-slope roof.
- Seams lifting or separating
- Blisters or bubbles in the membrane
- Cracks or splits in the surface
- Granules wearing off the cap sheet
- Water pooling in low spots
- Flashing pulling away from walls
- Leaks or ceiling stains inside
- Punctures near rooftop equipment
Seams lifting or leaks starting? We can help.
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Strong Seams, Fewer Leaks
Why Modified Bitumen Works in Gresham
On a low-slope roof, seams are where water gets in. Modified bitumen seams are heat-welded or adhered into a continuous waterproof layer, which holds up well against the steady rain Gresham sees from fall through spring.
Mod bit is also tough underfoot and resists punctures, making it a good choice for roofs with HVAC units or regular maintenance traffic. The granulated surface protects against UV, and reflective cap sheets are available to help keep buildings cooler.
Why Homeowners Choose It
Benefits of Modified Bitumen Roofing
Flexible Membrane
Rubber and plastic modifiers let the roof expand and contract without cracking.
Tear & Puncture Resistant
Reinforced sheets stand up to foot traffic and falling debris.
Watertight Seams
Heat-welded or adhered seams form a continuous waterproof layer.
Easy to Repair
Damaged areas can be patched cleanly with matching membrane.
Energy Options
Reflective cap sheets reduce heat gain and cooling costs.
15 to 25 Year Lifespan
A properly installed mod bit roof delivers long, reliable service.
Common Questions
Modified Bitumen Roofing FAQs
Modified bitumen is an asphalt-based roofing membrane that has been modified with rubber (SBS) or plastic (APP) polymers and reinforced with fiberglass or polyester. It is used on flat and low-slope roofs.
Most modified bitumen roofs last 15 to 25 years depending on the number of plies, the quality of installation, and how well the roof drains and is maintained.
Torch-down membranes are heated with a torch to bond them to the roof. Self-adhered and cold-applied systems use adhesive instead, avoiding open flame, which is often preferred on homes and occupied buildings.
Yes. It is durable, handles foot traffic, and is easy to repair, which makes it a common choice for flat sections on homes, garages, and porches in Gresham.
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