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Old 11-24-2013, 05:38 PM   #1
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Re-roofing a barn

I have a 36 x 48 timber framed barn that needs a new roof. Almost all of the rafters are still sound, but a few need to be replaced. When I was younger, I would have pulled all the old tin, replaced the rotted rafters and put down new tin. Now that I am older I don't want to pull the old roof down, I would like to roof over top of the old tin.
My plan is to lay purlins across the old roof and screw/nail these into the purlins and rafters below the original roof, then screw the new roof into the new purlins. In an effort to save time, can I use a nail gun to shoot through the purlins and through the old tin roof, or, will I spend more time in the E.R. having nails pulled out of my lower legs?



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Old 11-24-2013, 05:44 PM   #2
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Huge mistake with that whole idea.
To old to do it right (like I am) then hire it out.


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Old 04-10-2014, 10:03 AM   #3
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Just a follow up - did you end up replacing the entire roof?
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Old 04-11-2014, 05:01 PM   #4
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No I haven't. I am still not exactly sure what I am going to do. I don't have the money to have somebody else do it. I am going to talk with a friend that does construction and see what his take on this is. I will let you know what I figure out.

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Old 04-11-2014, 09:52 PM   #5
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Best to remove the existing.

Any chance you have neighbors that have younger backs that could help you with it in exchange for something you could do for them?

The only other thing I can think of is going right over the metal with metal of the same profile. No issue with stripping it which makes the installation of the new much easier and safer. Just sister new rafters on to solve the bad rafter issue.

Ideally it is stripped, bad rafters replaced and re-skinned with new metal.
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