Can you lay new roof felt on old?

Just depends on how new it is. Most good roofers will see and notice bad rotted spots without removing even the shingles. It won’t hurt anything to leave it on.

Can you put new roof felt over old?

It’s best to tear down to the bare roof deck so you can also check for any decking damage. But you can also add another layer of felt on top of existing. This will add additional thickness to the roof, so be sure that fasteners (nails) are long enough to penetrate both layers.

Do you need to remove old roofing felt?

The first thing you need to do is remove the old, worn felt from the roof. Generally, the felt is tacked all the way along each edge. … If any of the heads break off of the nails, hammer them below the surface of the wood so that there are no sharp points to rip the new felt.

Can you felt over old felt flat roof?

If you are repairing an existing flat roof, it is possible to torch the felt over the material already in place provided those materials are in good shape. If your current roof is not in good nick, it makes most sense to remove any old material and start over.

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Should I remove old underlayment?

Roof Decking Inspection – Your roof decking has to be inspected for any wood rot or mold during its replacement. To accomplish this, your exterior services provider will have to remove the old underlayment. That way, any potential causes for damage can be spotted and repaired as soon as possible.

Can you put plastic under roof felt?

Yes you need to add vents, you can get some plastic over flow pipe 22mm from wicks or b&q cut it up into 6″ pieces and stick them in between the overlaps in the felt pegs will hold them in place.

Does roof felt rot?

If the roof is felted, the felt will generally last as long as the roof covering, or at least 60 to 80 years. … Battens in the main body of the roof do not rot, unless there are some major long-term defects, or the tiles have become porous.

How long does shed roof felt last?

How long does the shed roof felt last? The felt we supply with all our sheds is superfelt, which is a highly durable form of felt that is likely to have a life expectancy of up to 5 years. This may differ for other types of felt, but the life expectancy is usually a minimum of up to 5 years.

How do you remove old felt?

So here’s what to do:

  1. Peel off any excess felt you can with your hands. …
  2. Use a Putty Knife and scrape your little heart out. …
  3. Use a corner cat sander with course paper (I used 60 grit) to remove the felt that’s really glued down. …
  4. Vacuum up all those yucky little green dust bunnies.
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How much does it cost to replace a flat felt roof?

The average cost of replacing a flat roof is usually in the range of £700-£1,300 depending upon what materials the roofer uses, whether or not scaffolding will be needed, and the size of the roof. There are numerous flat roof applications which have varying costs, including: Felt roof (£40 to £60 per m2)

What is the best adhesive for roof felt?

EVERBUILD BLACKJACK 904 Bitumen Roof Felt Adhesive is the ultimate cold applied, bitumen-based adhesive used to bond roofing felt to most surfaces metal, concrete, timber and more. It provides an incredible high bond strength which delivers a tough but flexible film that hardens and softens with changing temperatures.

What can I put over felt roof?

However, for surfaces such as felt, overboarding and adding an EPDM rubber roof is ideal for adding protection to it and further insulating your roof.

Asphalt flat roof construction, repair and replacement with an EPDM Rubber Roofing Membrane.

Type of Bonding Surface Flexi Proof DuoPly
Felt NO PU Adhesive

How do you remove glued underlay?

Underlay is either glued to the subfloor or stapled around the perimeter.

How to remove carpet underlay using a scraper

  1. Step 1 – Pull up underlay by hand. Take the underlay from one of the corners and pull it up from the floor. …
  2. Step 2 – Use scraper. …
  3. Step 3 – Use an adhesive remover. …
  4. Step 4 – Ensure room is well ventilated.

Do I need to replace underlayment?

Underlayment is a necessary element underneath many types of flooring. … Sometimes, this underlayment will need to be removed and replaced, such as when there has been some type of damage to the floor or when the finished flooring itself is being changed to update the material.

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Roofs and roofing