It is currently 28 Mar 2024, 11:28
MY63 wrote:Thanks guys.
I am going for the ideal world, As I currently have a 50mm gap I propose to fill that with insulation then vapour barrier and batten it. Then proceed with the OSB3 and EDPM.
tabs wrote:MY63 wrote:Thanks guys.
I am going for the ideal world, As I currently have a 50mm gap I propose to fill that with insulation then vapour barrier and batten it. Then proceed with the OSB3 and EDPM.
Sorry if I'm wrong but it seems the layers you have working from the underside of the roof are:
osb,
rigid foam insulation
and are then intending to put
50mm more rigid insulation
vapour barrier
osb and then epdm?
This is very similar to my roof construction but more of a hybrid?. I wanted a "warm roof" so I could have the rafters exposed inside. To my knowledge you shouldn't be putting a vapour barrier on top of the layers of insulation, it should have gone on top of the bottom layer of osb. On my roof I couldn't justify the expense of the top layer of osb so I just layed the epdm directly (glued) onto the insulation board. I did have a 50mm high batten all around the roof perimeter that I could glue the epdm to.
Sorry if I've got the wrong end of the stick or are confusing matters!
The epdm is breathable I think
MY63 wrote:Hi all
Nothing to update over the last few days I stood in front of my workshop on Sunday evening and thought this is too big. I wanted a small workshop as per the title and feel as though I have gotten carried away.
My neighbors are too polite to say anything but I don't think I would be too happy if one of them had built it.
Time for a rethink.
Rod wrote:I don’t think EPDM is breathable, it’s a rubber compound very similar to pond liners.
Rod
tabs wrote:Rod wrote:I don’t think EPDM is breathable, it’s a rubber compound very similar to pond liners.
Rod
Yes, its a rubber like compund but its advertised as breathable.
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