How To Waterproof Under A Timber Deck
First you need to purchase a continuous sheet of epdm which will cover the entire deck area.
How to waterproof under a timber deck. Install the purlin along the house and the outer purlin. Lower than the purlin along the house 12 x 1 4 3. Each component is chosen because of its durability. 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.
Then stretch a string between them. How to waterproof under your deck drainage. Our system provides you with a waterproof under deck by locking into a sturdy grid of supports across the underside of your deck. Epdm is available in widths up to about 50 so you can generally lay down a continuous sheet without any seams.
The dominant solution for waterproofing areas below decks is to drape plastic membranes within joist spaces below decking to form troughs. Easily attaches to new or existing deck joists to protect your under deck outdoor space from moisture mold and mildew damage. It goes on a milky white making it easy to. If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.
Follow up by cleaning the deck thoroughly with a stiff scrub brush and water. First mark all the purlin locations on the deck joists. Currently about 10 of our projects include a dry space under the decking either in part or under the entire decking surface. Azek and dryspace inc.
Just mix the concentrate with a gallon of water pour it into your garden sprayer or deck sprayer and cover your deck with a light coat of the formula. Are not affiliated in any way. One method of waterproofing under the deck is to install a membrane. Rinse with clean water after and let the wood completely air dry.
How to dry in underneath a deck without the expensive underlayment or systems. This is used to provide a durable long lasting waterproof membrane on top of your existing deck. Remember although the top might look dry it can take up to two days for the inside of the decking to dry as well. The trex rainescape deck waterproofing system shown below is an example of a membrane and downspout system.
No matter how you decide to go about waterproofing your deck controlling the water runoff is a primary.