Roofliner© is a roof underlayment manufactured and by DuPont. It is different than other roof underlayment in that it is:
Has not been used for decades, like asphalt impregnated roof felts
It’s bright blue!
It is typically installed under roof tile or asphalt roof shingles. If water gets below roof tile or asphalt roof shingles, whether in the field of a roof, at its ridge, hips or penetrations, the underlayment is supposed to hold the water on its surface and shed it at the eave or bottom of the roof – NOT allow it below the Roofliner, which means it will be in your house.
Roof underlayment must resist tearing when roofers handle it, cut it, nail it in place or walk on it while installing a roof. It must not rip or tear when cuts are made in it for or around penetrations. (e.g. dryer or waste vents). If it tears it will allow water under it and into your home.
Roofliner is made by DuPont and sold as superior to traditional asphalt impregnated roof felt/underlayment. However, homeowners have reported leaks from Roofliner related to tears in it, and burned-out locations from UV exposure.
Strangely DuPont only express warrants this product to builders and contractors, but not to homeowners.
If you are a new homeowner who has experienced roof leaks from a tiled or shingled roof that has Roofliner underlayment, you have legal rights to obtain redress. This could include re-roofing with non-Roofliner underlayment and or other remedies. If you have Roofliner as part of your roof system, you should contact Eppsteiner Law and speak with an attorney about your experience, your rights and how to protect the investment in your home.