Rain On Tar Paper Roof

It s your roofer s responsibility to try to make it water tight.

Rain on tar paper roof.

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. It sounds like the tarpaper covering this is the old tar paper correct. Certainly it would have been better to have covered the roof with a tarp or roofing felt before it rained. Normal delays and the rain you indicated will not affect the structural properties of the panels.

The top is protected from the sun by stone granules but there is no such protection on the underside. Over a long and i mean long period of time the sun heat will dry out the. It is typical for the roof to be in this condition for 30 60 days while other phases of the construction are completed. Our osb is rated exposure 1 and that means that it will withstand normal delays in construction.

Osb like all other wood will expand. I wouldn t trust it in the rain but it s not my job. 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.

Traditional roofing felt also called tar paper or underlayment is felt saturated with bitumen also called asphalt. Felt is compressed fibers of wool.