Always check the local codes.
How posts to support a roof.
Your porch roof will need to have a lot of support in order for it to stay up through the seasons.
Cut beams to fit.
For a house attached overhead measure cut and erect the posts that are farthest from the house first.
For a freestanding roof begin with the corners and then erect all of the intermediate posts.
Porch decks also require larger footings than deck footings.
Continuous posts from the roof to the footing transfers the roof load to the ground rather than the deck this only makes sense and then the deck itself should be supported on a beam by separate posts.
The beams support the roof rafters or joists which in turn hold the roofing material.
Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons.
After the temporary roof support is in place use the chalk to mark the footing of the column as well as where it attaches to the roof.
Continue installing porch.
For deck roof posts dig holes for the roof posts and pour cement to keep them secure.
Leave extra length to be sure you have enough.
They should be at least 101 inches long.
This post and beam design is secured with a post cap.
These will be reference points for the installation of the new column.
Determine how much support is needed.
The main structural members of patio and deck overheads are posts or columns and beams which run from post to post or from post to ledger.
Stand the nailed 2 by 4s on end on top of the jack with an assistant s help.
This will support this.
How to support a porch roof.
Removing the old porch column if your column is attached to a railing system you will need to detach the rail from the column to proceed.
For a roof six foot five inches your posts should be six feet five inches plus the 24 inches of the post that will be planted.