Choose a roof pitch 3 12 and roof structure 2x6 this places the new roof on top of the existing roof.
How to add a patio roof to existing roof.
Start with ledger board a ledger header board is the first step if you are attaching the patio roof to an existing structure.
Go to the same height as the existing roof if you want to have a clean look and make the patio cover flush with the existing roof you need to strengthen the fascia and back channel by reinforcing the rafters inside the existing roof.
Attach the rafters to the ledger boards and settle.
Building on an existing deck.
If attaching a patio roof to a ledger beneath the eaves does not allow for enough headroom you can set the new patio roof s rafters on the wall s top plate.
On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below.
8 inches in this case.
Determine the beam size.
Blow out the dust fill the hole with epoxy and insert the rod to the required depth.
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This method may be one of the most ubiquitous ways of attaching a.
Work from the view back not from the house out.
Let the epoxy set leaving it overnight will assure that it is rock solid and then add the anchor bolt anchor washer and nut and tighten.
Then fix the back channel to the fascia boards underneath the gutter directly.
Place the rafters on 24 centers attach them to the settle joists and beams toward the center.
The placement of the ledger header determines the level of the roof so be sure it is positioned at the correct height and is horizontal.
Attach the metal joist hangers to the rafters.
Most common ways to attach a patio roof to an existing house.
Attach the rafters to the house with joist hangers which supported by ledger boards.
Check local building code to see if you can attach a patio roof directly to your deck.
Fix the back channel to the fascia boards underneath the gutter directly.