Always use professionally engineered roof trusses designed for the dimensions of your roof.
Build gable roof over deck.
Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs.
Step 1 build the frame of the roof on the ground.
Gable roof the most common type of deck roof the gable roof forms a triangular shape projects along a ridge down the center of the deck and overhangs the enclosed space.
Nail 2 boards onto your walls as top plates.
Then run joists connecting the front of your roof with the rear every two feet along the length of your roof.
Typical decks are designed to support 55 psf lbs per square foot.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
Be sure to overlap the roofing felt 4 inches at all edges.
Paint your gable roof as required.
Attach roofing felt to the plywood with roofing tacks.
Nail the first boards on top of your wall where you plan to build your roof.
How to build a roof over your deck.
This significantly sloped deck roof allows for proper drainage of rain and snow as opposed to a flat roof.
To provide for roof decking nail the sheeting pieces of inch plywood to the trusses.
When you nail in the second boards offset the seams of the upper and lower layers by at least 24 in 61 cm.
How to build gable roof over deck porch.
Building a gable roof over your existing deck will make it more comfortable providing shade and shelter from the rain.
Next install the roofing drip edge and finish with roofing shingles.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.