What modified bitumen is
Modified bitumen is asphalt reinforced with polymers and a fabric mat, made in rolls. It's applied with a torch, hot asphalt, or cold adhesive, often in two layers with a mineral-surfaced cap sheet on top. Many Albuquerque homes have it on additions, portals and garages, or as the whole roof.
Common problems
- Seams opening up at laps and end joints
- Blisters and wrinkles from trapped moisture
- Granules worn off the cap sheet, leaving the asphalt exposed
- Edges pulling back at parapets and canales
- Ponding in low areas
Repair, coat or replace
Open seams and edge failures can be repaired with compatible materials. A modified roof in fair shape can often be coated to add reflectivity and life. When it's wet underneath or failing all over, it's time for a new roof: modified again, TPO or foam. See flat roof replacement.
Call us for a free look at your roof. You get photos of what we find and written pricing before any work starts.
Common questions
Is torch-down safe on my house?
Torch application is done by trained crews with fire precautions. Near wood or in tricky spots, cold or self-adhered products are used instead.
Can modified bitumen be coated?
Often yes, if it's dry and sound. The right primer and coating matter.
Is it the same as tar and gravel?
No. Both are asphalt-based, but modified bitumen comes in factory-made rolls and doesn't use loose gravel.