Fitting bitumen shingles

Discussion in 'Builders' Talk' started by Pete.W, May 22, 2020 at 10:07 PM.

  1. Pete.W

    Pete.W Member

    I was planning on doing my shed roof with these bitumen shingles:
    https://www.aboutroofing.com/ars-he...gles-3-square-metre-pack-black-green-red.html

    Have watched a few installation videos, but there's a couple things I'm not sure about…

    1 - Should I use a breathable membrane between the shingles and OSB? I should have enough left over from the walls to do the roof, but not sure if it helps - the videos I saw don't seem to use them

    2 - Do you need adhesive to stick them on? Some of the shingles I've seen have a self-adhesive backing but the one my supplier sells don't. I've seen in some videos, even without the self-adhesive, they seem to just nail them on, but I'd imagine the wind could lift them. Also wondering if having the breathable membrane would make this worse as the shingles wouldn't be stuck directly to the OSB.

    Cheers

    Pete
     
  2. Jord86

    Jord86 Screwfix Select

    No membrane, bitumen isn't breathable so don't mix the two. Nail them on, all the information you need is on the product details of the link you posted :rolleyes:
     
    rogerk101, Abrickie and Pete.W like this.
  3. Pete.W

    Pete.W Member

    Should I use an underlay, or just nail them straight on? The product info seems to imply you can, but don't have to…

    The other thing I'm not sure about is what to do at the edges - with a felt roof you'd normally bend them over the edge and nail a strip of wood over it, but in most of the videos I've seen they use an aluminium drip edge - though this seems to be an American thing. Any suggestions?
     
  4. Pete.W

    Pete.W Member

    Any thoughts on the above? :)
     
  5. Abrickie

    Abrickie Well-Known Member

    As the product used in the installation instructions doesn’t appear to be available, why not a UPVC ‘L’ shaped capping ?
     
    Pete.W likes this.
  6. Pete.W

    Pete.W Member

    If I use an underlay, which seems sensible, I guess I could fold and nail that at the edges as per a standard felt roof and then just have the shingles flush to the edge.
    Any reason not to do this?
     
  7. Abrickie

    Abrickie Well-Known Member

    Wind blowing in at the edge and ripping half the shingles off :rolleyes:
     
  8. Pete.W

    Pete.W Member

    Even if using felt adhesive at the edges?
     
  9. Abrickie

    Abrickie Well-Known Member

    Why take the risk ?
     

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