Building a deck over a flat roof is very similar to building a deck over a concrete patio.
How to build a deck above a flat roof.
A 1 5 inch thick rim joist cannot support a 3 5 inch thick post above.
To avoid any modifications to the existing deck below or to facilitate future replacement of the deck below.
Even if your roof has a slight pitch you can level it off through the construction of the deck s understructure.
Cut four 1 foot lengths of 2 by 6 lumber for your sill plates which act as bases to support each end of a.
But here it s a little bit more of a challenge.
You ll most likely be able to build the deck on that.
The thing is that the roof draining is through a hole in the center of the roof.
Either way the roofing has to be right.
Strips of 4 in wide epdm provide a layer of protection between the sleepers and the roof.
First it s designed to be waterproof and walkable whereas most other flat roof materials are not.
If you d like to build a deck over your roof make sure the roof has a covering that allows water to run off.
Obtain the requirements for a deck above a sloped roof from your jurisdiction s permits office.
Step 5 add handrails.
Step 2 order materials.
Blocking must be installed adjacent to the rim joist.
How to build a deck on a flat roof.
One of the challenges in building a deck on a roof like this that s unlevel is the deck needs to be level.
These decks are often referred to as floating as they are not secured in place as a stand alone structure.
Step 4 assemble the deck.
Step 1 simplify the project.
Now unlike your backyard that may be unlevel when you re building a deck you can set your post and adjust your framing nice and level.
To simplify a construction.
A properly constructed epdm roof should last 40 or more years.
So i will not be able to put the sleepers parallel to the slope.
Be sure that the deck floor frame is at least as thick as the entire cross section of the post above and below.
Relay to your architect any special.
That means there are 4 slopes leading the rain or melted snow water to the drain.
I am also planning to make a deck on my flat roof but i have some questions.
How to build a deck above a slope roof.
Framing the roof place the sleepers.
Still leaf debris and organic matter that gets through the slats in the decking will build up on the rubber roof and hold moisture.
That said a lot of people subcontract the roofing work and build the deck themselves.
The joists of the deck as with most flooring will be set out on 16 inch centers.
It s reliable it s fairly easy to work with and it requires no special tools.
How vinyl waterproof decking benefits roof decks.
Step 3 prepare the materials.
They are merely placed on top of another structure.
First you must make sure the roof is strong enough to support 55 lbs per square foot.
