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Parapet walls are unique in that they are exposed to the elements on three sides giving them a much higher degree of failure when compared to side walls or roof decks. Proper flashing techniques can definitely extend the life of the parapet wall and limit the chance of water leaks into the building structure. Epdm Geomembrane

Waterproofing parapet walls

There are a number of self-adhering membranes on the market designed for specific applications based on the final construction of the parapet wall. Will it be capped and with what – concrete, stone, metal or no cap? What is the final finish – brick, stucco, metal panels or portions left exposed? These will determine which type of waterproofing membrane is needed.

Typically, we recommend that parapet walls be covered with a membrane that possesses these traits:

Parapet wall and membrane consideration:

General installation tips and areas of concern when flashing a parapet wall:

The greatest potential for leaks is where the parapet wall meets the roof deck – eliminate this by using a 12” piece of membrane then covering with a full sheet. This is a key point for a success waterproofing application for years of worry-free performance.

Waterproofing parapet walls

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