Laying Roofing Felt Over Old Felt

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.

Laying roofing felt over old felt. Then use a second layer of top felt again with bituminous paint without having to use any clout nails. You can tell the decking is bad when you walk on the roof deck during tear off if the felt is laying flat leave it on i would have him use 15 lb ul felt. Lay it over metal flashing edges around vents and pipes. 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.

But you must take care to install shingles correctly so they lie flat. Fit felt around vent pipes or other protrusions by cutting it with a utility knife and fastening around the bottom of the vent. 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. Remove the drip edge and apply a thin strip of roofing cement at the top edge above the line you marked and.

Answered 11th aug 2018 like 3 bournemouth flat roofing ltd. If conditions are right new shingles laid over old shingles can be just as attractive and durable as shingles laid on bare sheathing. Kage november 19 2014 9 41pm 6. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones.

You can go whole hog by sanding and priming the roof decking and then using a bituminous paint to stick the underlay felt down. Laying the felt the roofing felt should be applied in layers that overlap. 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. You don t need to apply any tar before laying the felt however it depends on your needs.

As you work the paper can be tacked down in the center so it won t blow away.