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it is a professional company, they supply most of the trade.

Nope they wont give that, only external. No idea why

Yes I spoke to them, they only give external measurement, the ingress is the same on both sides. Im buying direct from manufacturer so they will make to fit.

Because the manufacturer only gives the external measurements.

Thanks can I do it with duck tape?

do I need to seal the overlap on the vapour control layer (vcl) ? Or is the overlap sufficient? Thanks

we are doing a build with a roof lantern the size we are having is 3.2x1.2m the manufacture only give the external measurements not the internal. The carpenter has constructed an upstand but the internal measurement is 96cm he said he does this so the plasterboard can be packed out and to allow...

Thanks for your help.

Thanks for the reply, would I be best half filling with rigid insulation to leave ventelation at the top like a cold roof construction? Just done a 29sqm warm roof on our extension my brains frazzled not sure why I hadn't thought of it being like a cold roof construction.

I have a draft from above a bay window, its an upper floor bay with a flat felt roof. I have striped the lath and plaster to reveal the wood. Can I just fill this with rock wool? or do I need ventilation ? I have looked on here but the posts I have found are for bays with tiles or ground...

thanks, wasn't sure if there was a calculation for what size for a given roof area.

is there a guide for what size lantern for what size roof? thanks

I think the link ,ight be wrong its a heat welded membrane, but im not sure its any better than EPDM. I think this is a better link Protan PVC Single-Ply Membranes and Roof Systems - Protan

Thanks for the reply the system I have seen is Protan Normal Roofing System - Protan But not sure if its any better then EPDM?

I have also looked at a polymer system that is fitted in Norway, seems to have very good reviews.

I paid £380 to have one done on ours. That was removing tiles, old lead, cutting in new wood and Code 5 lead valley and obviously reinstating the roof.

We have a 1930's semi that we are doing up. at the rear it has two small bays with flat roofs. they are not leaking, but look quite scruffy. I have thought about giving them a clean up and coating of Flag Roofix. Or would I just be creating issues? Thanks

We are having an extension with a roof lantern, what is recommended for the roof covering? I have had prices for GRP, Polymer and also rubber. I have fitted a rubber roof in the past on a large workshop and found it easier enough to do. The roofers concerned for obvious reasons recommend the...

We have a rather rubbish enclosed porch, can we just replace or do I need PP? Thanks

No idea I'll ask the designer