Using 8 x 8 x 8 half cinder blocks i build a column to support the jack i would use to raise the porch.
How to jack up a porch roof.
Check to make sure the porch beam is level by raising or lowering the jack.
In this video i jack up the corner of porch roof so that i can successfully install a section of half round gutter.
Put your level on the porch roof beam parallel to the front of the porch and that is probably what you ll find happened.
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.
Using a scrap piece of durock cement board i cranked the jack up to give it pressure enough to hold it in place.
Position a mounting bracket at one of the marks on the bottom of the porch.
Raise the sagging side back up where it belongs and you ll be able to install equal length posts.
Stakes go down about 18 to 24 could also use a permanent steel or wood posts in place then just build around it if your not changing out the footing.
Position a jack directly under the porch beam next to the column.
Position the post and use the jack to raise the porch beam slightly until the old column can be removed.
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The 4 ton jack that came with my ford transit van was more than sufficient to raise the porch a couple of inches.
I set it about a foot out from the house as not to interfere with where i needed to work on the column.
Measure from the porch beam to the jack and cut the 4 4 to just under this length.
The jack did all the work.
Once it is plumb mark the position on the porch roof.
I started by sitting the jack on the porch floor immediately above the porch s skirt board.
Install another bracket in this position.
1 or 3 of a porch rework more buil.
Fortunately the adjustment i needed to make was a common size.