Kerabit Dual is a membrane which is overlapped halfway across the width, the result being a secure dual-layer roofing conveniently with one product, involving no hot work. Kerabit Dual is grey in colour. One roll will provide 4m2 of finished roofing.
Kerabit Dual, which has been designed for a do-it-yourself builder for waterproofing of balconies, has been developed further to suit roofs with an inclination of 1:2 – 1:20. Dual is particularly well suited for low-inclination roofs.
In order for the roofing to be secure and remain waterproof for years, the adhesive surfaces must effectively adhere to one another. Take the high adhesiveness into account when installing Dual. Once the adhesive surfaces have been laid against one another and have adhered to one another, the installation can no longer be amended without new lengths.
The outside temperature should be at least +10oC when Kerabit Dual is installed.
BROOF(t2)
A balcony is similar to a low-slope roof in structure. The inclination must be at least 1:80 so that water can be led off. Kerabit Dual may be applied onto a wood or concrete understructure. A concrete surface is treated with an adhesive solution Kerabit BIL 20/85 prior to laying the membrane.
Balcony structure 1. Decking or Kerabit OSB Roof Board 2. Eave flashing 3. Kerabit Dual Bitumen Membrane, coating with a wooden rack or slab
A drip edge flashing is installed to the edge of the balcony. A triangular batten is fixed next to the wall and Kerabit Dual is turned up onto the wall for at least 300 mm.
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