Roof system
Modified Bitumen Roofing explained
Modified bitumen is asphalt blended with rubber (SBS) or plastic (APP) modifiers and reinforced with polyester or fiberglass. Sheets are torched, cold-applied or self-adhered in two or more plies.
The multi-ply build gives redundancy and good puncture resistance, which suits roofs with regular foot traffic and equipment service.
Warning signs
When to Call Blackstone
- Blistering or bubbles
- Cracks and alligatoring
- Seams opening at laps
- Granule loss on the cap sheet
- Ponding water
- Flashing pulling away from walls
How we help
What Blackstone Does
New mod-bit systems
Multi-ply installation with base and cap sheets.
Repairs
Blister cuts, patches and seam repairs.
Coating restoration
Reflective coatings to extend service life.
Questions
Modified Bitumen FAQ
Is torch-down roofing safe?
Torch application requires trained crews and fire-watch procedures. Cold-applied and self-adhered options are available where open flame is not suitable.
Can modified bitumen be coated?
Yes. A reflective coating can extend its life and lower roof temperatures.
How is it different from BUR?
Both are asphalt-based. Modified bitumen uses factory-made modified sheets, while BUR is built up on site from felts and hot asphalt.
Related
Related Services
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