The American National Flood Insurance Program does not cover wind-driven rain, according to FEMA. The ice and water protector membrane, fully adhered to the roof deck, greatly lessens the chance of the wind-driven rain infiltrating the roof surface and causing a leak. In strong storm situations, such as hurricanes, the wind can push rainwater beneath the shingles. In fact, contractors can use ArmourGard as an exterior vapor barrier for foundations or basements. Canada’s National Roofing Contractors Association classifies any material with 0.5 perms or less as a vapor retarder. This measurement describes the material’s permeability, or how many grains of water can pass through the material in an hour at a certain level of water pressure. Two of IKO’s ice and water protector products, GoldShield and ArmourGard act as water retardants and achieve a superior moisture transmission rate of fewer than 0.5 perms. Should a homeowner decide to cover the entire roof with ice and water protector, it is even more important to consider proper attic ventilation carefully. ![]() However, because the modified bitumen back surface is continuous, these membranes can result in a vapor barrier. ![]() Potentially, covering an entire roof with ice and water protector can prevent leaks even after high wind conditions blow shingles off the roof-preventing further damage and making repair easier. The membranes are designed to form a watertight seal around the nail penetrations when shingles are applied. The film is removed during application so that the membrane will adhere to the roof deck and also form watertight end laps and side laps when properly applied. Ice and water protector products have a modified bitumen adhesive back surface that is covered by a release film.
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