How To Build A Waterproof Deck Roof

Step 1 clean the deck.
How to build a waterproof deck roof. The footings for porch decks must be larger than deck footings. Epdm is available in widths up to about 50 so you can generally lay down a continuous sheet without any seams. Any dirt and debris will keep your waterproofing sealer from sticking to the lumber. First you need to purchase a continuous sheet of epdm which will cover the entire deck area.
Then run joists connecting the front of your roof with the rear every two feet along the length of your roof. Currently about 10 of our projects include a dry space under the decking either in part or under the entire decking surface. There are a few things that make pvc decking different in regards to roof decks. Build the frame of the roof on the ground.
Many porches use 22 diameter corner and intermediate. First it s designed to be waterproof and walkable whereas most other flat roof materials are not. Cover furniture or items on your flat roof deck that are not meant to be waterproofed with the drop cloth. Raintight panels made of aluminum lock together to create waterproof joints.
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. Deck framing needs to be sloped with at least a 1 8 inch per foot pitch for drainage a consideration when you re retrofitting an existing deck with a waterproof decking product.
The most common approach is to use a heavy gauge epdm membrane typically 60 mil as the roofing membrane usually placed over rigid insulation. As a result most decks have inadequate footings to support a new porch roof. Porch decks require 25 additional psf for roof loads for a total of 80 psf. How vinyl waterproof decking benefits roof decks.
It also incorporates coolstep technology so you don t burn your feet and can also potentially lower your. Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber. Typical decks are designed to support 55 psf lbs per square foot. Make sure it s free of all dirt and debris.
There are a number of icc es listed manufacturers of class a walking deck systems see class a fire resistant walking and roof deck systems sidebar.