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Old 02-13-2014, 08:41 PM   #1
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100 year old house porch roof raising/shoring


Hello,
I am getting ready to lift the front porch roof (on my avatar) to replace the decking and some frame pieces. I'm not raising much, only enough to slide the new decking under and to replace some base pieces on the columns, hopefully the columns are good. I plan to raise the porch by the lentil under the eaves (I swear it is concrete but most likely it's stucco) and brace it, but I am not sure if I should secure the roof using 2x6x16's at the lentil as well or up at the facia and soffits? Any recommendations would be greatly appreciated. Thxs

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Old 02-13-2014, 11:27 PM   #2
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100 year old house porch roof raising/shoring


Let me ramble for a min.
I've redone dozens of old porches like yours before and this is a partial list of the things you may or may not be facing so you will be ready for a plan B if you run into trouble.
The bottoms of columns rot out because there in direct contact with the decking with no drain holes, most people caulk them, worst thing you can do.
Now all the moisture has no way out.
There needs to be a pier and footing under all of the columns, it not the decking is going to sag and cause a low spot for water to pool.
Want this to be mantaince free, or are you trying to preserve it back to what it was?
There's way to keep the same look but make it not rot out ever again.

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Old 02-13-2014, 11:31 PM   #3
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100 year old house porch roof raising/shoring


Quote:
Originally Posted by joecaption View Post
Let me ramble for a min.
I've redone dozens of old porches like yours before and this is a partial list of the things you may or may not be facing so you will be ready for a plan B if you run into trouble.
The bottoms of columns rot out because there in direct contact with the decking with no drain holes, most people caulk them, worst thing you can do.
Now all the moisture has no way out.
There needs to be a pier and footing under all of the columns, it not the decking is going to sag and cause a low spot for water to pool.
Want this to be mantaince free, or are you trying to preserve it back to what it was?
There's way to keep the same look but make it not rot out ever again.
I will be moving into the house with my wife a 2 girls so I want to do it right. Any advice will be greatly appreciated! Thanks
I also started loading more pictures of the house in my profile if that helps with my question on where I should secure my braces, soffits/facia vs lentil location

Last edited by thebarn61; 02-13-2014 at 11:34 PM. Reason: more info
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Old 02-13-2014, 11:31 PM   #4
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100 year old house porch roof raising/shoring


Since this might involve more than roofing/siding I moved the thread for ya
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Old 02-13-2014, 11:39 PM   #5
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100 year old house porch roof raising/shoring


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Since this might involve more than roofing/siding I moved the thread for ya
carpentry?
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Old 02-14-2014, 12:03 AM   #6
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100 year old house porch roof raising/shoring


Think your using the wrong term.
What you need to lift I would call a beam.
Only need to work on one column at a time, and only need to lift about 1/4 to do what you want to do.
I use a 10 ton bottle jack, A 4 X 4, and two 2 X 6's.
One 2 X 6 on the floor, bottle jack, 4 X 4, then another 2 X 6 under the beam to spread out the load.
They make 2-1/4" vinyl coated T & G composite flooring with a wood grain.
Using Simpson post bases with stand offs will keep the 4 X 4's inside that column off the decking.
Using 1 X 6 PVC lumber as a base with vinyl cove moulding to trim out the top will divert the water away from the base of the columns.
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Old 02-14-2014, 12:04 AM   #7
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100 year old house porch roof raising/shoring


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carpentry?
Carpenters are "jack of all trades" lets see what happens.

I know you've had some issues loading images but it might help if you could give us a couple pics of your lift points and areas to repair.
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Old 02-14-2014, 12:39 AM   #8
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100 year old house porch roof raising/shoring


Nail 2 2X6s to look like a T shape, you want to jack up on the same beam the columns are on.
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Old 02-14-2014, 09:25 AM   #9
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100 year old house porch roof raising/shoring


Quote:
Originally Posted by joecaption View Post
Think your using the wrong term.
What you need to lift I would call a beam.
Only need to work on one column at a time, and only need to lift about 1/4 to do what you want to do.
I use a 10 ton bottle jack, A 4 X 4, and two 2 X 6's.
One 2 X 6 on the floor, bottle jack, 4 X 4, then another 2 X 6 under the beam to spread out the load.
They make 2-1/4" vinyl coated T & G composite flooring with a wood grain.
Using Simpson post bases with stand offs will keep the 4 X 4's inside that column off the decking.
Using 1 X 6 PVC lumber as a base with vinyl cove moulding to trim out the top will divert the water away from the base of the columns.
My terms need tweaking for sure. I am planning on using a pole shore to lift the roof a 1/4 at the corner columns inside the porch frame then brace with 4X6 on the outside, beefed up bases (24x24 3/4 plywood and 2x's) with 4X6 top plate as you described. I do need to replace some of the framing due to rot as well.
My question pertains to additional braces (might be overkill) that would prevent the roof from shifting) at a 20 degree +/- angle from the ground (staked) to the soffit/facia or to the lentil? 4 in the front and 2 on the sides.

I tried to include more pictures but after the 1st one loaded I get "missing token" and can not upload more?
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100 year old house porch roof raising/shoring-001.jpg  
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Old 02-14-2014, 09:44 AM   #10
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100 year old house porch roof raising/shoring


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My terms need tweaking for sure. I am planning on using a pole shore to lift the roof a 1/4 at the corner columns inside the porch frame then brace with 4X6 on the outside, beefed up bases (24x24 3/4 plywood and 2x's) with 4X6 top plate as you described. I do need to replace some of the framing due to rot as well.
My question pertains to additional braces (might be overkill) that would prevent the roof from shifting) at a 20 degree +/- angle from the ground (staked) to the soffit/facia or to the lentil? 4 in the front and 2 on the sides.

I tried to include more pictures but after the 1st one loaded I get "missing token" and can not upload more?
Here's a better picture regarding brace location
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100 year old house porch roof raising/shoring-2x6x16-brace-location.jpg  
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Old 02-14-2014, 09:58 AM   #11
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100 year old house porch roof raising/shoring


If you did it that way your jack would not be sitting under a rim joist to keep it from going down as your jacking.
And would be right where you need to be replacing the deck boards.
The only columns that are holding up the roof are the ones along the front edge, the side ones are just for looks.
And I would not feel good about now having to have 3 people to do a two man job plus having that much weight over my head while working.
I had some simple caps made up for my bottle jacks, nothing more then a piece of steel pipe about 1" long welded to a 6 X 6 1/2 thick steel plate.
When you set them on top of the piston the pipe keeps it in place and the plate keeps the top of the piston from compressing into the wood.
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Old 02-14-2014, 10:05 AM   #12
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100 year old house porch roof raising/shoring


In that picture you just posted the longest one would be doing nothing, if god forbid it came down it would just rip off the fascia and roof sheathing.
Here's a picture that sort of shows how that roof is likely framed.
http://www.bing.com/images/search?q=...electedIndex=1

You need to be supporting just the rim joist.
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Old 02-14-2014, 10:09 AM   #13
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100 year old house porch roof raising/shoring


I would remove the pole shore jack inside the deck frame after bracing the lentil above the columns outside of the deck frame with the 4x6 's between the 4x6 plate on the lentil and beefed up base plates
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Old 02-14-2014, 10:13 AM   #14
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100 year old house porch roof raising/shoring


The large picture was for additional bracing not the support bracing just to keep it from possibly shifting.
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Old 02-14-2014, 10:16 AM   #15
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100 year old house porch roof raising/shoring


Okay you answered my question on the extra supports I should definitely use the lentil not the facia/soffits I see. Like I said I probably don't need these it was just an extra precaution for any possibility of the roof shifting when I raise it


Last edited by thebarn61; 02-14-2014 at 10:23 AM.
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