But if the felt roof is done with good thickness high performance felt it should last a long time depending on when it was done.
Leaving old felt on roof.
Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches.
He took the shingles off and the felt paper is still intact.
It would be crazy to try to save that old felt paper.
Just like they said if its a re roof you do not need felt paper if you are not tearing the roof off you need drip edge and shingles and depending on how good of a roofer you are and what kind of job you do all the other little stuff like flashing new pipe flanges caulk etc but if you are tearing the old roof off than you must have felt and yes we take all the old tar paper off till you see nothing but plywood how else can you see if the wood is all ok.
Find a pre screened local roofing contractor.
Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left.
The old felt should be stripped off and the boarding aswell so you have a clean service for rubber or you can primer for a fibreglass roof.
Plus water has to ruin the felt before it ruins the wood and is easy to see.
Oh you should put new felt paper on.
On roofs with a slope of 4 12 or greater use a single layer of 15 lb.
He s wondering can you just go ahead and shingle over that or should you replace the underlayment.
If you charge the homeowner to lay the felt then lay it.
Before oct2007 we never tore off the exisiting felt unless it was crumbling apart or there was rotten wood to be replaced.
When you use certain types of wood to construct your deck there is sometimes a risk the wood will leach small amounts of resin over time as it ages.
When building felt s primary role is to keep water off the plywood to limit warping.
Old felt roof on a garage extension is knackered the roofer that came to examine the felt roof didnt do epdm but measured job up for me and states he knows someone that does this work anyway been offered to have epdm replacement when asked about job involved he states.
It prevents wood resin stains.
Thanks for the business i m the one they call to come fix there leaky roof.
If the felt several weeks old and blowing off the felt itself is non issue because it s so cheap to replace.
If you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles.
So in closing it s probably not that big of a deal to leave the felt on.
As previously mentioned roofers know where the rotten wood is even before the shingles are touched.
He says he s re roofing an old house.
Hope all goes well.
If they agree its not neccessary than f it.
