Is It Okay To Leave Old Felt On Roof

Roofing underlayment roofing felt requirements.

Is it okay to leave old felt on roof. The only thing i could think of that would potentially be a problem is this. If you do not remove the old tar paper you will not be able to see potential damage hiding under it. 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. In these instances the felt beneath the older shingles is regarded as adequate.

It will break down in sunlight and with large amounts of ongoing. This would impact the felt s ability to protect against moisture. Is it okay to leave the old felt on. Felt details for various roof slopes amp.

It would be crazy to try to save that old felt paper. Oh you should put new felt paper on. One disadvantage of traditional felt roofing underlayment is it generally can t be left exposed for more than a few hours. The material may dry out or leach oils in the heat.

Is roofing felt required. As long as the sheathing is ok and by the look of it it probably is a double layer of felt will do no harm. There are several disadvantages to using felt underlayment on a roof. Is it okay to leave the old felt on.

Sometimes theres no reason to remove the old felt. If an experienced roofer doesn t notice any bad spots just by walking on em they probably aren t there. Having a layer of roof felt will block the resin preventing it from staining or compromising your roof shingles. It prevents wood resin stains.

You can tell the decking is bad when you walk on the roof deck during tear off if the felt is laying flat leave it on i would have him use 15 lb ul felt. This article series discusses roofing felt specifically addressing the roofing code or roofing manufacturer s requirements for use of an underlayment such as roofing felt tarpaper or other underlayment products beneath asphalt shingles and other. He took the shingles off and the felt paper is still intact. 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.

He s wondering can you just go ahead and shingle over that or should you replace the underlayment.