Rain On Tar Paper Roof

It sounds like the tarpaper covering this is the old tar paper correct.

Rain on tar paper roof.

Bitumen or asphalt is distilled from petroleum and is what makes roofing felt waterproof. By carlye jones roofing felt also known as tar paper serves as both an extra layer of protection between the shingles and the plywood and as a temporary moisture barrier until all the shingles. Any repairs would be his problem. Our osb is rated exposure 1 and that means that it will withstand normal delays in construction.

When shingles are placed on top of rippled tar paper voids are created which act as little greenhouses that collect heat and break down the shingle from the underside. Over a long and i mean long period of time the sun heat will dry out the. When tar paper gets wet it buckles and ripples. It s your roofer s responsibility to try to make it water tight.

Osb like all other wood will expand. The top is protected from the sun by stone granules but there is no such protection on the underside. It is typical for the roof to be in this condition for 30 60 days while other phases of the construction are completed. Felt is compressed fibers of wool.

Traditional roofing felt also called tar paper or underlayment is felt saturated with bitumen also called asphalt. I wouldn t trust it in the rain but it s not my job.