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I think you might have misunderstood what I meant by insulated render. I think you are talking about EWI that is rendered over. This thread was about render with a low thermal conductivity so that the render itself does the insulating. Diathonite evolution, Bauwer lite etc. EPS and Rockwool...

I took a look at the website yesterday and couldn't see any, either under insulation, or render. What brands to they have?

Yes, plan to do that at some point. But internal insulation is tricky, especially on an old house. Can risk interstitial condensation so I need to think it through, and there are difficulties with old features such as cornices etc, that would restrict the thickness etc. There is a product...

Thanks vfr12 - Bauwer was the first product I looked at, but the diathonite had a better thermal conductivity which is why I was focussing on that. I'm not a plasterer, and its not something I would be any good at even if I took my time, so I would need to get someone to do it. The Mason I have...

Thanks GrantyBoy. I'll admit I am a bit nervous about this product. On paper it looks great, but if it isn't applied right, or looks crap in the finish, then it could be a lot of money spent for...

Thanks JV, I did a search for lime hemp plaster but the makers were not publishing the thermal conductivity or resistance, only saying that it had "some thermal properties". I found one supplier stating that hemp lime plaster had a thermal conductivity of 0.07-0.09 W/mK. The Diathonite...

I was told that a bag of Diathonite was around £35. I worked out the price compared to Bauwer and a few others per square meter based on an equivalent thermal resistance and its was slightly more expensive. The advantage it has is I can get a higher thermal resistance, and thus better U value...

Hi all, First post, not a plasterer (couldn't plaster a flat surface of more than an inch to save my life) but hopeful that this is the place to get some info and maybe even some local contacts! I have recently bought an old Sandstone house, that has had cement based render/harling applied to...