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Shed Roof - membrane & felt...


Carrerahill

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As per the title, I built a little shed, the roof is 11mm OSB, I wrapped the rest of the structure in membrane before I clad it and decided just to throw some membrane onto the roof to dry it in, I went a little bit over the top and ended up with a fully membraned roof all tucked in and stapled down looking good - if I was putting on tile or slate I would be sorted - however after much deliberation I have just gone for bog standard roofing felt - I got some IKO stuff - question is, do I leave the membrane on?

 

A couple of things I have considered, breathable membrane under felt, I know will do nothing useful, but it may help protect the shed further in the future when the felt starts to fail. The membrane is designed to have a gap for breathability, being sandwiched in between OSB and felt might impact how it performs but I do wonder if it could rot, or somehow degrade...

 

I wonder if the membrane will allow to much slip between that and the felt and may aid in it falling off in the future, I have bought the IKO felt adhesive for the joints but had considered a bead here and there to help bond it to the OSB to reduce slip. 

 

So, answers on this would be good thanks.

 

 

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You could leave the membrane in place, secure the felt by wrapping over the edges and adhesive at the joint/lap over. A few nails wont hurt to prevent flapping and tearing in the wind (sounds like a line from a song).

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