Modified Bitumen Roof Blisters

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

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Usual Issues Attached To Modified Bitumen Roofs

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.

Modified bitumen roof blisters.

Using hot asphalt fused by torching the sheets together or cold applied using adhesives or peel stick. Repairing a rooftop with modified bitumen coating. The most common problems include. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube.

All conventional low slope roof systems can experience blisters in some form. Liquid applied coatings should be installed per the manufacturer s instructions which may include a waiting period. It s necessary to inspect the modified bitumen roof. The resulting mixture is called modified bitumen.

Determine the extent of the damage. Modified bituminous sheets are made by combining. It contains a base sheet with no granule and a cap sheet with granule protection. Blisters typically develop from lamination voids within the system or product.

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 system is a two ply application waterproofing system. Either embed aggregate in hot bitumen or roof cement or apply a surface coating compatible with the existing surfacing. To make bitumen tougher and more elastic a synthetic polymer is usually added.

Repair of blisters on modified systems in general blisters that are keeping air in will keep water out. 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. Construction definition roof blister. They typically are installed as a one two or three ply roof system.

These reinforced rolled sheets can be adhered by. If the membrane is damaged your contractor will need to replace the entire damaged area. The membrane consists of a multi layer sheet of asphalt with polyester or fiberglass reinforcements and plastic or rubber modifiers. 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.