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VELUX BFX 1000 Waterproofing - waterproofing membrane and gutter. The waterproofing membrane perfectly matches the size of the roof window, ensuring easy, fast, and secure installation. Easy attachment to the window frame and roof battens. Breathable film minimizes the risk of condensation. Corner connections with self-adhesive and overlapping flaps provide water resistance and easy installation. The membrane can be used for both flat and profiled roof coverings. Adjustable drainage gutter included in the kit.
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