Hey guys and gals, I looked at a job the other day and it has me concerned.
Roof is very wavy and owner wants it fixed.
Log cabin was hand built in 87, roof rafters are flat one side logs, I believe they were put up green with no rime or reason as to placement.
Another "issue" is that the "builder" used 1x6 t&g over the rafters instead of 2x6 t&g then 2" of high R sheathing, then 5/8" wafer board (pretty sure it wasn't OSB, too long ago). Well here's the kicker, sheathing was put on with no regard to where it landed, just used 8' sheets and went with it, only nailing on rafters, ends float.
It has 3 tab shingles on it now.
Here is my plan of attack if I take it on:
remove shingles,
strap every 16" horizontally with 2x4's nailed and or screwed to rafters and shimmed to a string. Put 1 1/2" high R in between strapping/purlins, sheath vertically with 5/8" cdx, run new trim board to cover strapping and shingle with arcs.
This would all be over top of the existing wafer board sheathing and insulation.
Is the extra weight going to be an issue? The rafters are logs about 8" diameter, roof pitch is about an 8/12.
A) Should I call in an engineer?
B) Rip it all off to the rafters and use 2x6 t&g then 3" high R and sheath?
C) Run Forrest run!
Don't really want to run as I see it as a money maker but I don't need the headache.
Here's another option for the fix given that the rafters will support it all.
Put 2" high R over existing sheathing then strap horizontally over the rafters to level it all then strap vertically every 16" and sheath then shingle.
The owner would like the extra insulation, I think solid insulation as compared to in between the strapping would be better.
thanks,
dave
Roof is very wavy and owner wants it fixed.
Log cabin was hand built in 87, roof rafters are flat one side logs, I believe they were put up green with no rime or reason as to placement.
Another "issue" is that the "builder" used 1x6 t&g over the rafters instead of 2x6 t&g then 2" of high R sheathing, then 5/8" wafer board (pretty sure it wasn't OSB, too long ago). Well here's the kicker, sheathing was put on with no regard to where it landed, just used 8' sheets and went with it, only nailing on rafters, ends float.
It has 3 tab shingles on it now.
Here is my plan of attack if I take it on:
remove shingles,
strap every 16" horizontally with 2x4's nailed and or screwed to rafters and shimmed to a string. Put 1 1/2" high R in between strapping/purlins, sheath vertically with 5/8" cdx, run new trim board to cover strapping and shingle with arcs.
This would all be over top of the existing wafer board sheathing and insulation.
Is the extra weight going to be an issue? The rafters are logs about 8" diameter, roof pitch is about an 8/12.
A) Should I call in an engineer?
B) Rip it all off to the rafters and use 2x6 t&g then 3" high R and sheath?
C) Run Forrest run!
Don't really want to run as I see it as a money maker but I don't need the headache.
Here's another option for the fix given that the rafters will support it all.
Put 2" high R over existing sheathing then strap horizontally over the rafters to level it all then strap vertically every 16" and sheath then shingle.
The owner would like the extra insulation, I think solid insulation as compared to in between the strapping would be better.
thanks,
dave