Sagging garage roof.


Old 04-11-08, 01:53 AM
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Sagging garage roof.

We just bought a house which has a few issuses that need to be fixed. We bought it knowing that. I am not in the construction field at all but am handy and can do most repairs. The garage is is 14 by 20 with a 8 by 8 addition off to the side near the back of the garage. The roof is sagging and the right wall is bowed in the middle and the left is leaning toward the right. The lean is about 6 to 8 inches from top to bottom. The rafters are 2 by 4's on 2 foot centers there is a ridge board and it is cracked slightly in the middle at the skaff joint. There are perhaps three collar ties. There is a sill placed on concrete blocks one block high. I really don't want to tear the garage down but would like to save it if at all possible. What are my options the sag is about 6-9 inched in the middle. Any suggestions would be greatly appreciated.
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Old 04-11-08, 01:14 PM
Join Date: May 2007
Posts: 115
The roof is probably sagging because the wall has bowed out and let the base of the roof spread apart. Usually the ceiling joists run parallel to the rafters and hold the base of the roof triangle together. Sounds like you need some judicious use of come-alongs to pull the top of the walls back together and then renail or add framing to hold things in place.

The leaning wall can also be pulled with come-alongs from the the top of the wall to the base of the other wall (assuming the lean is outward). Then add plywood to the corners of the intersecting walls, nailing the perimeter and all studding within the PW, to hold things plumb. Can do this front-back and left-right to get all the walls plumb.
Old 04-12-08, 05:26 AM
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If you could, post a couple of pictures on a site such as and either give us the urls or copy/paste the HTML code in your reply post. We could, then, see what you see and offer more advice.

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