How To Build A Waterproof Roof Deck
Once the primer dries apply the geo textile on all edges and seams on the plywood deck roof or balcony.
How to build a waterproof roof deck. For example recently a simple 3 800 deck repair turned into a 120 000 project thanks to dry rot damage to the framing shear walls and decks. That s unfortunate because building a reliable long lasting waterproof deck over living space is relatively straightforward when the best practices and materials are used. Step 2 cover the deck. A perimeter frame and graduated spacer nailers are fastened beneath the deck joists so that the plane of the ceiling slopes slightly at least 1 4 inch per foot away from the house toward the joist header.
Raintight panels made of aluminum lock together to create waterproof joints. The costs can be astronomical. Cover furniture or items on your flat roof deck that are not meant to be waterproofed with the drop cloth. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will drain and not pond the finished walking surface of the roof deck surface should be below the level of the interior floor by at least 1 1 2.
Clean off the dust then apply the primer to the entire surface with a large paint brush. The roof deck should be properly flashed with a. Use the liquid rubber deck coating under the textile to stick it to all seams. Any dirt and debris will keep your waterproofing sealer from sticking to the lumber.
Make sure it s free of all dirt and debris. This is used to provide a durable long lasting waterproof membrane on top of your existing deck. Epdm is available in widths up to about 50 so you can generally lay down a continuous sheet without any seams.