Step 1 measure the height from the ground to the eaves under your porch.
Support a porch roof temporary.
Create a temporary beam.
Temporarily supporting porch roof i ve seen idiots try to jack things up with a bottle jack and 2 2x6s nailed together like a double and that post will bend i ve shown them a 2x4 t post and it lifted the load no problem.
From typical porch layouts the columns at the corners and depending on.
I need some ideas for supporing the roof during demo.
Bird mouth the top cut and dig a small kicker in at the bottom of course i ll usually have post jacks in place somewhere so i can slightly jack up the roof to release the column.
If you are thinking about replacing old rotted porch posts the first thing you ll need to know is how to jack up and support the roof structure properly and.
The supports need to have some sort or jacking ability to raise and lower the roof down once the new structure is in place.
Your porch roof will need to have a lot of support in order for it to stay up through the seasons.
For a 20 foot porch roof you will then need to have five different temporary supports.
The larger the roof is the more support that you are going to need.
Screw a scrap 2x4 beneath each one to act as a foot.
Temporarily supporting porch roof i usually slam two 2x6 s together in a sandwich and pepper them with nails.
By properly supporting the porch roof with temporary but reliable bracing you can go about your project without worry.
For larger porches such as wrap around porches you will want to make sure that the support is more than you need.
For larger applications like supporting floor joists in the basement 4 x 4 posts should be set at 6 foot intervals.
For a lightweight awning simple 2x6s will suffice as supports.
Determine how much support is needed.
The bracing will take an afternoon and give you as many stress free working days as you need.
Start by fastening temporary wood blocks to the rafter tails image 1.
Stakes go down about 18 to 24.
This will protect the original porch wood and support the temporary beam.
Problem we have to support the 10 x 28 gable roof demo the 1st and 2nd floor porch columns and 2nd floor porch.
Set firm footing the temporary support that you use will need to have a firm footing in order to hold up the weight.
To replace the decking you would not be replacing any columns or framing joists that would be supporting the load of the roof.