Roof Felt Problems

Flat roof defect 2 blistering.

Roof felt problems.

Even small amounts of trapped moisture can result in your flat roof membrane detaching from the layer below and cause roof blisters. To counteract the forces that are exerted on the roof the roofing and insulation must be fastened and secured to the perimeter and the main roof structure. Wind driven water that would normally flow down the felt and into the gutter instead drips onto the soffit and then back onto the ceiling of the room below through gaps in the felt. The vacuum and the uplifting pressure created by wind blowing over the edge of the roof can partially rip the roofing membrane or system that has been applied.

Often water runs to openings in the vapor barrier such as at ceiling light fixtures. The best way is to install the roof drip edge only along the eaves first then place ice and water barrier in the snowbelt or felt paper underlayment over the drip edge. Buildings magazine examined which problems are most common and the conditions that can either cause or be the result of premature failure and reduced service life of low slope roof systems. If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic.

Find and fix a leaking roof step 2. A common problem is when roofing felt on a roof with an enclosed soffit disintegrates around the eaves of a roof. This is the most common roofing problem and it tends to get worse during the day when the heat of the sun causes the trapped moisture to expand. Obvious or unforeseen roof problems are always a pain and undoubtedly a significant expense.

Most damage shows up either in flashing that s deteriorating due to weathering and oxidizing or in flashing that has come loose. Four reasons asphalt saturated felt roof underlayment fails asphalt saturated felt roof underlayments will fail if torn or damaged during installation. This lets any water that gets on the roof run down the underlayment and over the drip edge. Specifically if the underlayment.

Sometimes the water shows up at a ceiling spot distant from the leak. Depending on the style of your house s roof you probably have it in the valleys around the chimney and pipes and around any dormer windows or skylights.