Felt for shed - talk to me

Author
Discussion

SVS

Original Poster:

3,824 posts

272 months

Tuesday 26th August 2014
quotequote all
Hi, are there different qualities of felt to consider for a shed? confused Different types, grades or thickness? Any recommendations?

Pheo

3,341 posts

203 months

Tuesday 26th August 2014
quotequote all
Yes there are,normally rated by years of life.

Cheap shed roof felt is generally carp and won't last long. I just used two layers of Wickes Traditional Underlay and 1 layer of traditional roofing felt. The cheap stuff didn't look like it would last ten minutes.

This is onto a sloping roof of a brick built shed, with a 5-10 degree incline. Deck consisted of (Replaced) joists of 2x4 with 11mm OSB3 ontop (I should have gone for 18mm, 11mm flexes a LOT when you walk on it, which you have to do with a flat roof!)

Nail the first layer of underlay to the deck, then tar ontop the next layer, and then tar on the top layer. I used cold set bitumen paint type adhesive. Don't have joints which overlap directly (I laid the intermediate underlay layer at right angles to the first and top layers, and offset the top layer from the bottom layer). Use Felt Capping role for the edges / awkward bits.

I used this guide: http://www.diydata.com/projects/flatroof/flatroof....

Still not worked out how to get my drips to stay folded under yet!

Renovation

1,763 posts

122 months

Tuesday 26th August 2014
quotequote all
I've only come across shed felt - thin and easy to use - lasts around 5 years

Flat roofing felt - approx twice as thick - unsurprisingly lasts approx 10 yrs

Spare tyre

9,592 posts

131 months

Wednesday 27th August 2014
quotequote all
It's really expensive stuff

I replaced my shed roof with see through plastic sheeting which makes the shed a lot friendlier for working in

My shed is out of site so I don't care what it looks like


If you do go down the felt route I'd consider doing several layers at the same time so you can just peel one off when it fails


Local gumtree and eBay always seem to have it if you are not in a desperate rush

elanfan

5,520 posts

228 months

Wednesday 27th August 2014
quotequote all
Get yourself an offcut of single membrane - it will outlast you!

Rosscow

8,774 posts

164 months

Wednesday 27th August 2014
quotequote all
Yep - I'm currently building a decent new garden shed and I'll be going with the membrane stuff over lead.

roofer

5,136 posts

212 months

Wednesday 27th August 2014
quotequote all
Cheap felt is made from rags. The best felts are too dear for a shed, I have a project at the moment where we're paying £81 for a 7m roll of mineral . Look for an IKO felt in a roofing stockist, should be about £30 a roll for 8m and will outlast the shed.

andy43

9,730 posts

255 months

Wednesday 27th August 2014
quotequote all
As above - an offcut of EPDM, a tin of solvent based adhesive and if you want to be really flash get the correct drip edge trims instead of using nails.

Foppo

2,344 posts

125 months

Thursday 28th August 2014
quotequote all
I've got two small sheds.Standard felt I have coated the sheds roofs with bitumen first.

If it last five years ok by me.

C0ffin D0dger

3,440 posts

146 months

Monday 1st September 2014
quotequote all
Just done my shed after moving it with the Wickes extra durable shed felt. Comparing the standard and extra durable in the shop they're miles apart, the standard stuff is very thin and tears easily whereas the extra durable was thicker and wouldn't tear. Used a brush on felt adhesive on the overlaps as well.

Can only see if it stands the test of time. The stuff I took off tore very easily and was pretty knackered, only had the shed ~5 years but was in the sunniest bit of the garden so may not have helped, it's now in the shadiest bit!

I'll report back in a few years laugh

steveo3002

10,534 posts

175 months

Monday 1st September 2014
quotequote all
i went with a epdm kit off ebay ..bit dearer than nice felt and the bits n bobs but seems a much better idea , hasnt go nails bashed through it for a start