Installing a porch roof over an existing deck is usually not recommended unless the deck was originally designed to support a future porch.
How to build a deck roof nz.
Brace the pile in the correct position and leave to set for at least 24 hours.
Build the frame of the roof on the ground.
Pour a further 100mm minimum of concrete and position the pile.
Use the stringlines on the profile to ensure the area is square with a 3 4 5 triangle.
This is a crucial step to building a good deck.
Install your first batten so that it lines up with the edge of your pergola.
Frame up a box the size of the outer dimensions of your deck using 2 by 4 inch lumber.
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Lay stringlines where the bearers are situated on your plan.
Then run joists connecting the front of your roof with the rear every two feet along the length of your roof.
Tie strings to them marking the outer edges of your deck.
Align the edge of the first length of decking boards with the outside edge of the beam.
Prior to laying the decking it s important to air season the timber.
Next to the house drive stakes as close to the house as possible and tie strings to them.
Place the pile back in the hole with the cut end up.
Use a spacer to show you where your next batten should go before you screw it down.
Cover the bottom of the hole with 100mm of concrete.
Simply put a couple of posts in the corners of the deck farthest from the building with a header between them and add rafters up to the roof of the building or attached to a ledger fastened to the wall of the building.
Typical decks are designed to support 55 psf lbs per square foot.
It normally comes from a treatment facility and is stored outside at timber yards.
As you install the decking boards perpendicular to the joists drive two fasteners through each board into the center of.
Alternatively you can measure the diagonals and make sure they are the same length.
Place the batter boards beyond the corners of your planned area.
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Pre drill the batten with your driver and then screw the batten to every rafter of the pergola.
Porch decks require 25 additional psf for roof loads for a total of 80 psf.