Pitched Roof Under Deck

Porch decks require 25 additional psf for roof loads for a total of 80 psf.

Pitched roof under deck.

Lower than the purlin along the house 12 x 1 4 3. Install the purlin along the house and the outer purlin. For those who desire a bit more shade and privacy while soaking up the rays however a deck roof may be in order. Summer calls for sultry nights under the stars and sun drenched cocktail gatherings making the backyard deck the ultimate destination this season.

Then stretch a string between them. First mark all the purlin locations on the deck joists. Centers supported by a beam and a ledger as on most decks. Instead a pair of beams rest on supports called sill plates to create a frame for the deck.

Roof deck framing unlike for decks at ground level doesn t entail a ledger attached to the rim joist of a house. Whenever i install decking over a roof i make sure the framing is structurally sound and properly pitched to drain water. Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch. Once you have your beams in place everything above them joists deck boards balusters and handrails is the same as for any other deck.

A deck on a sloped roof requires a different approach to the framing underneath the joists. The minimum pitch for a standing seam metal roof is 1 4 or 3 inches rise to 12 inches run. The project illustrated here was a complete teardown and rebuild so i framed the roof with 2x8s spaced on 16 in.