Modified Bitumen Roof Blisters

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. Modified bitumen roofs are a cross between built up and single ply systems. Blisters in a modified bitumen roof.

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It s necessary to inspect the modified bitumen roof.

Modified bitumen roof blisters.

Liquid applied coatings should be installed per the manufacturer s instructions which may include a waiting period. 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. 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. If the membrane is damaged your contractor will need to replace the entire damaged area.

To make bitumen tougher and more elastic a synthetic polymer is usually added. They typically are installed as a one two or three ply roof system. All conventional low slope roof systems can experience blisters in some form. Repair of blisters on modified systems in general blisters that are keeping air in will keep water out.

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. Repairing a rooftop with modified bitumen coating. Blisters typically develop from lamination voids within the system or product. The resulting mixture is called modified bitumen.

The membrane consists of a multi layer sheet of asphalt with polyester or fiberglass reinforcements and plastic or rubber modifiers. The most common problems include. These reinforced rolled sheets can be adhered by. It contains a base sheet with no granule and a cap sheet with granule protection.

Modified bitumen roof system is a two ply application waterproofing system. Determine the extent of the damage. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing.

Construction definition roof blister. 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. Modified bituminous sheets are made by combining.