Step 2 cover the deck.
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.
Use the liquid rubber deck coating under the textile to stick it to all seams.
Once the primer dries apply the geo textile on all edges and seams on the plywood deck roof or balcony.
Materials required fiberglass panels gutter and downspout pressure treated 2x4s roofing screws.
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.
Cover furniture or items on your flat roof deck that are not meant to be waterproofed with the drop cloth.
Step 1 clean the 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.
Any dirt and debris will keep your waterproofing sealer from sticking to the lumber.
Clean off the dust then apply the primer to the entire surface with a large paint brush.
The costs can be astronomical.
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.
The roof deck should be properly flashed with a.
Epdm is available in widths up to about 50 so you can generally lay down a continuous sheet without any seams.