Can I reuse roof felt?

Yes, they are. No problems there. They’ve done work for me before, but I never noticed that they leave the old felt on. They have an 11 man crew, and they can have a couple roofs off and back on again by the end of the day.

Is it OK to put new roof felt over old?

14 Answers from MyBuilder Roofers

If re:felting over existing felt then the total area in question should be primed first to allow the new felt to adhere to the old as this is the only way to be sure the two felts bond together.

Does roofing felt need to be replaced?

However, it will generally be degraded more quickly than your tile roofing at any climatic condition and you will have to replace it. Asphalt felt, the most common type of underlayment has a lifespan of between 20 to 30 years. However, in extreme extended conditions, its lifespan can be cut by half.

What can I do with old roof felt?

As always, if you can’t use it up/reuse it in that way, try offering the pieces on your local Freecycle/Freegle group — someone nearby may make hutches or bird tables and be able to include it in their work.

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Should old underlayment be removed?

When it comes to a roof replacement, it’s important that everything should be done properly. … With that in mind, when replacing your roof, one of the things that you should make sure will be done is to completely remove and replace the old underlayment.

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?

Traditional bitumen sarking felt is the cheapest option for roofing underlay, and is readily available. It is slightly different from flat roofing felt as it includes a strong woven base, but it can become brittle over time and can rot into the guttering where it has been exposed to sunlight.

How much does it cost to replace roofing felt?

Replacing a small patch of felt can cost from as little as £200 (equivalent of 4m2). However, if you have extensive damage and need to replace the felt for the whole roof that will cost you a lot more. The average cost of refelting a whole roof under tiles is around £4,800.

Should I use 15 or 30 pound felt?

If your roof does not have a steep pitch, you can use #15. This weight of felt is a good economic choice if you have a standard roof. But if your roof has a steep pitch, #30 is a better option because it is thicker and tears less during installation. With #30 you get a thicker layer of underlayment and protection.

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How Long Does felt roofing last?

What is the lifespan of a felt roof? A felt roof will last somewhere between 10 and 20 years. The older pour and roll method of installation has now been superseded by torch-on felt which is melt welded on to a flat roof.

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.

Do I need to remove old shed felt?

Depending on whether your shed is in a sheltered position or not, you might need to replace the roofing felt as often as every 2-3 years. However, buying good quality felt and doing a good job of fitting it should mean that maintenance will be required much less often.

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.


Can I put 2 layers of felt on shed roof?

So it is possible to have 2 layers of felt in General. For instance, an alternative to 30# felt is to put two layers of 15# felt, or often 2 layers are recommended on a 2/12 pitch roof.

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Roofs and roofing