If you are going to use shingles to cover the patio roof do not forget to install black roofing felt along with a single layer of oriented strand board.
Roof ledger board attachment.
Attach the rafters to the ledger boards and settle joists.
Make sure to check the vertical beam to ensure that the end rafters are placed securely.
For instance if your roof has a steep pitch you may be able to use 2 inch by 4 inch rafters but if your roof has a low pitch building code may require that you used 2 inch by 6 inch or 2 inch by 8.
Not designed for snow regions the ledger board can create a snow dam that puts undue stress on the ledger board.
Properly installing a ledger board for your deck is one of the most important structural components of building a safe and strong deck.
When all the rafters are installed correctly form your patio roof by attaching the planks horizontally across the rafters.
Place the rafters on 24 centers attach them to the settle joists and beams toward the center.
The opposite side of the porch roof will be supported by a header beam that is installed parallel to the house on top of 6x6 support posts.
This is a time consuming process and should be done while the house is being constructed to simplify the process and reduce costs.
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.
For low pitch roofs building codes may require larger dimension rafters.
If you are tying the roof directly to a house wall you can install a ledger board with flashing and install rafter ties to attach the rafters at the appropriate angles or use engineered trusses.
When they are installed you can begin attaching roofing shingles.
Attach the rafters to the house with joist hangers which supported by ledger boards.
Attaching to roof top ledger board.
Five ledger board techniques explained and illustrated.
As roof pitch is lowered the weight burden on the rafters increases.
These 18 articles will teach you how to install flashing and bolt the ledger connection to the house rim.
Any one of these five ledger connection methods properly installed will give you a reliable long lasting deck that is secure.
A common element in adding porch roofs is fastening one end to the house either to a wall or to a roof.
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.