How To Build A Waterproof Roof Deck
The roof deck should be properly flashed with a.
How to build a waterproof roof deck. First you need to purchase a continuous sheet of epdm which will cover the entire deck area. This is used to provide a durable long lasting waterproof membrane on top of your existing deck. Step 2 cover the deck. Step 1 clean the deck.
Use the liquid rubber deck coating under the textile to stick it to all seams. Cover furniture or items on your flat roof deck that are not meant to be waterproofed with the drop cloth. Epdm is available in widths up to about 50 so you can generally lay down a continuous sheet without any seams. 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.
Make sure it s free of all dirt and debris. 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. Any dirt and debris will keep your waterproofing sealer from sticking to the lumber. 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.
The costs can be astronomical. Raintight panels made of aluminum lock together to create waterproof joints. Clean off the dust then apply the primer to the entire surface with a large paint brush.