Pramote polyamate getty images.
Substitute for roofing felt.
In my expert opinion the three layer felt roofing system is the better option.
Roofing felt is highly flammable and can exacerbate the danger in case of a fire.
A variety of different types of manufacturers have developed proprietary polymer blends that make up synthetic underlayment.
The felt will help protect the plywood from moisture and rot.
The first glass fibre layer fitted loose this for the purpose of any building movement ensuring the felt does not split.
An alternative to cheap felt roofing.
It is waterproof and durable as well as cheap but there are a number of downsides to its use.
After stripping the original siding from a 30 year old house i m being asked to re side with 4x8 and 4x9 fiber cement panels designed to look like stucco.
One of the fastest growing trends in the roofing industry is the use of a synthetic roof underlayment under a number of different roofing systems.
Roofing felt has been a popular material for flat roofing systems for over a hundred years.
The second glass fibre layer fully bonded with hot bitumen and the third layer also fully bonded being a high performance non rip material.
You could just put shingles over plywood but you run the risk of replacing your roof and any damage to the structure that may accur.