[ben2000]

Hello all,

Some background: I have an old home built in the 60's, with solid brick walls, recently acquired on a trade (it was a trade up). The sheathing is 1x6 or 1x8 TnG. However, the roof has major water leaks but only where there was an oak tree (middle part of roof on back side). This damaged area covers a section about 12 by 20 feet. The damage is extensive. Water coming in on heavy rains and dry wall buckling. I have crawled around the attic and will have to sister some rafters and replace some 1x's with plywood. Although, the ends and entire front side have little to no damage. Though I haven't walked on top they appear very try and insulation fluffy from years ago.

I was going to tarp it and wait until I have the money but my wife just became pregnant and I am concerned about the mold and holes in the damaged area.

I would like to start placing metal over the shingles(maybe 2 sections at a time?) each weekend until I get to the back middle. Then, tear that part off, replacing it with metal and #30 paper (possibly double) to make up for the shingle thickness on the rest of the roof. Does this sound feasible? I'm a mathematician not a contractor, :wink2:.

 

[Windows on Wash]

Not in your climate.

Pull the old roof and reroof in metal.

You don't need the additional thermal mass in that assembly.

 

[ben2000]

Understood, but I don't have the money to do it all at once and tearing it all off will take even more money. Is it possible to do the tear downs in sections? Probably 8 or 4 foot for the plywood. It seems simple to piece the ridge cap but what about alongside the metal coming down?

Furthermore, if I do a tear down to the sheathing (TnG), should I put a gap and reflective material or does this depend on the metal?

Lastly, is it okay to leave the TnG boards if the wood is good?

 

[Windows on Wash]

Radiant barriers require an air gap to work.

You could tear it down in sections but the propensity to leak in those cases goes up quite a bit.

It can be done, but its tougher.

 

[PatChap]

How long do you think before you can afford to do the bad side?
I would go with your original plan and tarp it for now,fastened with 1x2 furring strips to keep it down.
Yes if the boards are in good shape its fine to use them again, you may want to renail them.