Modified Bitumen Roof Blisters

A pocket of air trapped between the layers of a roof membrane between the components of a roof assembly or within a layered roofing product such as an asphalt shingle. All conventional low slope roof systems can experience blisters in some form. Modified bitumen roofs are a cross between built up and single ply systems.

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The big issue with repairing a modified bitumen roof surface is the question of whether moisture has made its way into the asphalt layer and if so how much.

Modified bitumen roof blisters.

Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. Using hot asphalt fused by torching the sheets together or cold applied using adhesives or peel stick. All blisters originate with the formation of a void or unadhered area in the mopping bitumen either between the felt plies or between the substrate and the membrane. They typically are installed as a one two or three ply roof system.

Roofing membranes for low slope application are generally asphalt or polymer based 1 bitumen has been used as a roof water proofing agent for many years. Bitumen roof if the membrane is in good condition your contractor can simply cut an x shape into the blister to access the layer underneath. Determine the extent of the damage. It contains a base sheet with no granule and a cap sheet with granule protection.

If the membrane is damaged your contractor will need to replace the entire damaged area. Blisters in a modified bitumen roof. Liquid applied coatings should be installed per the manufacturer s instructions which may include a waiting period. The membrane consists of a multi layer sheet of asphalt with polyester or fiberglass reinforcements and plastic or rubber modifiers.

The resulting mixture is called modified bitumen. The most common problems include. Blisters typically develop from lamination voids within the system or product. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube.

Modified bitumen roof system is a two ply application waterproofing system. Repairing a rooftop with modified bitumen coating. Construction definition roof blister. It s necessary to inspect the modified bitumen roof.

Repair of blisters on modified systems in general blisters that are keeping air in will keep water out. To make bitumen tougher and more elastic a synthetic polymer is usually added. Modified bituminous sheets are made by combining. These reinforced rolled sheets can be adhered by.