How To Build A Rooftop Deck On A Sloped Roof

By john fenton n b canada i want to build a deck on a sloped roof.

How to build a rooftop deck on a sloped roof.

Careful detailing of membrane roofs at corners doorways and penetrations is critical for long term performance. Before installing a roof deck you must be certain the roof is stable and weatherproofed. Building a deck above a porch roof allows for sheltered space below and views from above. Since most roof decks are floating structures that sit on top of flat roofs it s crucial to weatherproof the roof below the deck to prevent water from seeping into the home.

Building a deck over a flat roof is very similar to building a deck over a concrete patio. On average 300 sq ft. Plan to space the 2x4 purlins parallel to the house and 3 ft. First you must make sure the roof is strong enough to support 55 lbs per square foot.

Building a deck on a sloped roof. They are merely placed on top of another structure. My plan is to open up the roof and sit a couple of 4x4 posts on top of the outside wall. But the rooftop location does offer some unique challenges particularly in regard to the deck s foundation.

This is usually because low quality leak prone decking materials such as epdm rubber are used often in an effort to save money. Hardwood decking is then fastened to tapered pressure treated sleepers that rest on additional strips. Photo by dave holbrook. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will.

The roof must be able to support 55 pounds per square foot at a minimum. Unfortunately many homeowners who have a flat deck roof have to deal with frequent leaks. How do i flash between post and roof. Tie your existing deck posts into the roof by extending your corner posts with the 4 by 4 lumber.

To provide drainage the panels should slope toward the outside edge of the deck about 1 4 in. In this article builder emanuel silva shares his method for building such a deck which begins with a leak proof low slope roof of epdm rubber. Of roof decking costs 800 2 800 to install depending on the material you choose. Epdm is the best choice for most rooftop decks.

If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3. A deck on a sloped roof requires a different approach to the framing underneath the joists. These decks are often referred to as floating as they are not secured in place as a stand alone structure. Much of the work that s being done here is identical to what you would see on any deck built in a suburban backyard.

How to build a deck roof. Some key details for a leakproof rooftop deck are. One of the challenges in building a deck on a roof like this that s unlevel is the deck needs to be level.