Summer calls for sultry nights under the stars and sun drenched cocktail gatherings making the backyard deck the ultimate destination this season.
Pitched roof under deck.
Once you have your beams in place everything above them joists deck boards balusters and handrails is the same as for any other deck.
Whenever i install decking over a roof i make sure the framing is structurally sound and properly pitched to drain water.
Instead a pair of beams rest on supports called sill plates to create a frame for the deck.
The minimum pitch for shingles is 1 6 which is equivalent to 4 inches rise to 24 inches run.
The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run.
A deck on a sloped roof requires a different approach to the framing underneath the joists.
First mark all the purlin locations on the deck joists.
The project illustrated here was a complete teardown and rebuild so i framed the roof with 2x8s spaced on 16 in.
Typical decks are designed to support 55 psf lbs per square foot.
For those who desire a bit more shade and privacy while soaking up the rays however a deck roof may be in order.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.
Then stretch a string between them.
If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.
Install the purlin along the house and the outer purlin.
Centers supported by a beam and a ledger as on most decks.