Building a deck over a flat roof is very similar to building a deck over a concrete patio.
How to build a flat roof deck.
Hi thanks for the interesting blog.
May 7 2014 before we look at how to build a deck on a flat roof here s an example of what not to do as debris settled into the cracks of the gravel roof it became a muddy sponge and the sleepers became dams with big rains.
How to build a roof over a deck step 1.
I am working on a roof deck.
Step 4 assemble the deck.
I am also planning to make a deck on my flat roof but i have some questions.
The thing is that the roof draining is through a hole in the center of the roof.
Lift the box.
The standing water eventually seeped through and rotted the frame.
Step 5 add handrails.
Tie your existing deck posts into the roof by extending your corner posts with the 4 by 4 lumber.
First you must make sure the roof is strong enough to support 55 lbs per square foot.
The joists of the deck as with most flooring will be set out on 16 inch centers.
They are merely placed on top of another structure.
So i will not be able to put the sleepers parallel to the slope.
I repair replace and build decks i do not notch my 4x post but when it is there already i like to use metal bracket on the two sides and if possible go underneath the deck and beef up the framework and add more support were i can the main idea in my opinion on rail system and support depends on how high the deck is.
Step 2 order materials.
To simplify a construction.
These decks are often referred to as floating as they are not secured in place as a stand alone structure.
How to build a deck on a flat roof.
Frame up a box the size of the outer dimensions of your deck using 2.
Step 3 prepare the materials.
Build the frame of the roof on the ground.
Then you will install sleepers or flat 2x6s laid flat every 16 on top of the roof surface.
This will provide the surface for you to attach the decking.