Basic felt solutions cost around 50 per square metre for the material itself and more high end materials such as modern grp a form of fibreglass going up to 90 per square metre.
Roof felt broken.
However there are problems with asphalt saturated felt underlayment that can cause it to fail.
Force the mold away from the roofing a few inches at a time then lift off the entire piece in one section.
Where wind driven rain is working under the roof and causing leaks then the felt will need to be replaced.
Four reasons asphalt saturated felt roof underlayment fails.
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Phil demonstrates what can happen when roofing felt has gone rotten and what needs to be done to fix it.
Hold onto the old shingle mold if it looks to be in good shape.
A poor quality asphalt saturated felt roof underlayment is at high risk of failure.
Starting at one corner of the roof wedge a pry bar into the narrow space at the top of the shingle mold the thin wooden strip that sits just below the shingles.
Holes in roofing felt are quite common here we repair a hole in some roofing felt that is underneath the tiled roof.
Asphalt saturated felt roof underlayments will fail if torn or damaged during installation.