Laying Roofing Felt Over Old Felt

When felting over any old felt you can use a bitten primer to get a proper fix some felts are also a 3 layer system allowing them to go over old felt however if he has quoted for old felt to be removed then that is what he should have done.

Laying roofing felt over old felt.

Answered 11th aug 2018 like 3 bournemouth flat roofing ltd. Laying the felt the roofing felt should be applied in layers that overlap. Roofing felt is comprised of a base made from natural materials such as wood cellulose or synthetic ones such as fiberglass or polyester and then coated or saturated with a protective coating such as bitumen asphalt which repels water but still allows the product to breathe. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing.

Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. Most roof rot i d say over 90 at least around this neck of the woods occurs at the eaves not in the main field area. Fit felt around vent pipes or other protrusions by cutting it with a utility knife and fastening around the bottom of the vent. Http www fixmyroof co uk how to felt a shed roof in this video how to felt a shed part 2 we will be looking at how to fit felt to a shed roof and jus.

You can go whole hog by sanding and priming the roof decking and then using a bituminous paint to stick the underlay felt down. You don t need to apply any tar before laying the felt however it depends on your needs. Also if the roof leaks it is never going to because the felt was installed incorrectly it will be because whatever ontop of the felt was installed incorrectly shingles shakes whathaveyou. Lay it over metal flashing edges around vents and pipes.

Start at the bottom of the roofline and work up so any water that gets through the roofing material will shed down the tar paper and will not go under it. Use a felt tip marker to make a short line on the drip edge to indicate proper position. But you must take care to install shingles correctly so they lie flat. As you work the paper can be tacked down in the center so it won t blow away.

Remove the drip edge and apply a thin strip of roofing cement at the top edge above the line you marked and.