With the roof supported you can do the repair work.
How do you temporarily support a porch roof.
Determine how much support is needed.
For a 20 foot porch roof you will then need to have five different temporary supports.
How to support a porch roof.
Tri square pencil circular saw 2 inch wood screws 3 inch wood screws drill gun an assistant.
Without a picture i m guessing but it would be best to put a temporary beam under the roof side to side and adequate temporary support columns under the ends of the beam with some diagonal bracing.
Things you ll need tape measure spade large wooden stakes mallet 2x6 boards about 30 percent longer than the height of your porch eaves enough of them to put two every five feet around.
Stakes go down about 18 to 24.
Your porch roof will need to have a lot of support in order for it to stay up through the seasons.
Temporarily supporting porch roof i usually slam two 2x6 s together in a sandwich and pepper them with nails.
Temporarily support the porch roof on either side of the rotted post with a hydraulic jack and a long 2x4 post.
Bring in the temporary beams and install them in place.
Use a reciprocating saw to cut the top of the post free from the overhead beam.
Generally the roofers have their own methods to determine the approximate number of beams or temporary wooden supports that would hold the available area of porch roof.
Make sure that the beams support the roof well and are not left loose or wobbling.
Cut beams to fit.
From typical porch layouts the columns at the corners and depending on the length you may have additional columns coming down along the length of the porch that provide the load support for the.
You should have a spacing between each support of 4 feet plus two in each corner.
For larger applications like supporting floor joists in the basement 4 x 4 posts should be set at 6 foot intervals.