Roof Leaking On Underside Plywood Articles

Step 2 shine a flashlight along the underside of the roof and look for a hole in the roof as well as areas that are wet or have been darkened by moisture.

Roof leaking on underside plywood articles.

The next morning i went into the attic which resulted in finding that frost had formed on the underside of the roof sheathing and on the roofing nails. Trowel the roofing tar into the leak on the underside of the roof deck using a putty knife. Push the shingle or plywood into the tar and trowel more roofing tar around the edges of the patch. Roofing felt is a layer of tar paper installed beneath the shingles to provide a backup waterproof membrane in case of leakage.

Unless the roof is leaking the line you see on the roof is an aesthetic problem but the cupped plywood is putting an added strain on the shingles either side of the visible line. In our roof interior attic photo at left you can see antique roof framing along with black stains and probably some mold growth from a long history of roof leaks. The longer your roof leaks the higher the cost will be when you repair it. In fact it is estimated that mold can start to grow on damp surfaces within 24 to 48 hours.

If you have a leaky roof you d better fix it immediately even if it doesn t bother you much or you re getting a new roof next year. Check out this article for more on preventing ice dams. Even over a short time small leaks can lead to big problems such as mold rotted framing and sheathing destroyed insulation and damaged ceilings. Even in this case in our opinion the reasons to remove and replace roof sheathing and framing would normally be based on the condition of the roof framing and sheathing not on the.

There was mold on pretty much all the rafters rot at the sheathing by the eaves as a result of the gutters overflowing and wicking up. On structural concrete and possibly wood planks or plywood moisture drips may not be observed. Locate the source of the leak by examining the underside of the roof from within your attic or crawl space. Felt otherwise known as underpayment is required when.