Laying Roofing Felt Over Old Felt

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

Laying roofing felt over old felt.

Lay it over metal flashing edges around vents and pipes. Remove the drip edge and apply a thin strip of roofing cement at the top edge above the line you marked and. But you must take care to install shingles correctly so they lie flat. You don t need to apply any tar before laying the felt however it depends on your needs.

Answered 11th aug 2018 like 3 bournemouth flat roofing ltd. Kage november 19 2014 9 41pm 6. Fit felt around vent pipes or other protrusions by cutting it with a utility knife and fastening around the bottom of the vent. 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 can go whole hog by sanding and priming the roof decking and then using a bituminous paint to stick the underlay felt down. 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. 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. Laying the felt the roofing felt should be applied in layers that overlap.

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. Installation is easier than for a tear off job because you can use the existing shingles as guides for laying the new ones. 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.

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.