Modified Bitumen Roof Repair

What This Service Involves

Modified bitumen roofs layer asphalt-based membrane in rolls, and over time our freeze-thaw and UV cycles cause blistering, alligatoring, and seam separation. Water that gets under a lifted seam or into a blister spreads between plies and rots the deck long before it drips indoors. We cut out and rebuild failed areas with compatible mod-bit, either torch-applied or cold-adhered depending on the setting and safety of the structure. Restoring solid ply adhesion and seam laps returns the roof to a durable, monolithic barrier.

Benefits

Rebuilds failed plies for restored waterproofing; Repairs blisters and splits before they spread; Matches SBS or APP modified bitumen to the existing roof; Offers torch or cold-applied methods per site needs; Protects the deck from moisture trapped between layers

Our Process

1) Inspect for blisters, splits, alligatoring, and open seams; 2) Cut out failed membrane down to a sound, dry base; 3) Rebuild plies with matched mod-bit and reseal all laps; 4) Surface, inspect, and confirm the repair sheds water

What Affects the Cost

Whether the system is torch-applied or cold-adhered; Extent of blistering and ply separation found; Fire-safety limits on torch work near the structure; Square footage of membrane to be rebuilt; Condition of the base sheet and deck underneath

Best Time of Year

Dry summer weather supports both torch and cold applications, though we address active mod-bit leaks whenever they occur.