NickK Posted November 14, 2020 Share Posted November 14, 2020 (edited) Hi, I’m curious if anyone here used thermohouse roof system and what’s their experience. https://thermohouse.co.uk/thermoroof/ What was your deciding factor over SIP’s or traditional cut roof? I know every project would be different but how does cost compare to other systems? Is it easy enough to build dormers with it? Thanks Edited November 14, 2020 by NickK Link to comment Share on other sites More sharing options...
PeterW Posted November 14, 2020 Share Posted November 14, 2020 Think @Conor is using it. Link to comment Share on other sites More sharing options...
Conor Posted November 15, 2020 Share Posted November 15, 2020 Unfortunately not! Contractor won't do it and we're getting a cut roof I stead. Actually makes things easier for the PV installation. Link to comment Share on other sites More sharing options...
Nick Laslett Posted November 15, 2020 Share Posted November 15, 2020 (edited) It was used on one of the Grand Design house’s on the Graven Hill development. https://thermohouse.co.uk/blog/thermoroof-grand-designs/ https://thermohouse.co.uk/project/graven-hill/ The short YouTube clip is blocked in UK. You can use a VPN get round this. The whole episode is on Catch-up We will be using the complete Thermohouse system for our build next year. We have 6 dorma windows, two on the house, three on the cartlodge. Here is one of their build’s with good pictures of the dorma. https://thermohouse.co.uk/project/raleigh-close-hendon/ The Technical Manual is available to download on the website and covers the roof system in a lot of detail. https://thermohouse.co.uk/download/thr-018-dormer-window/# Edited November 15, 2020 by Nick Laslett Link to comment Share on other sites More sharing options...
Bitpipe Posted November 15, 2020 Share Posted November 15, 2020 I visited one of their sites and considered the whole system for our build but then went TF instead (cast concrete for basement). Was quite impressed with it though. I remember SIPs roofs being very expensive when looking at other ICF systems. Link to comment Share on other sites More sharing options...
NickK Posted November 15, 2020 Author Share Posted November 15, 2020 Thanks @Nick Laslett for these. Really handy. I am still a long way from having to worry about this but have to start research early. I really like the fact it seems very DIY friendly (not too sure about dormers, though). @Conor Is that because they are not familiar with the system? Link to comment Share on other sites More sharing options...
Vijay Posted November 15, 2020 Share Posted November 15, 2020 I sadly found them absolutely useless at getting back to me. After about 4 attempts I just gave up Link to comment Share on other sites More sharing options...
Nick Laslett Posted November 15, 2020 Share Posted November 15, 2020 1 hour ago, Vijay said: I sadly found them absolutely useless at getting back to me. After about 4 attempts I just gave up That is a shame. I sent them 1 email asking them to recommend an architect familiar with their system and went from there. Link to comment Share on other sites More sharing options...
Conor Posted November 16, 2020 Share Posted November 16, 2020 11 hours ago, NickK said: Thanks @Nick Laslett for these. Really handy. I am still a long way from having to worry about this but have to start research early. I really like the fact it seems very DIY friendly (not too sure about dormers, though). @Conor Is that because they are not familiar with the system? Builder we went for not familiar with it and would rather do a cut roof. Roof span from ridge to plate is just over 4m so doable with 215x50 joists. Link to comment Share on other sites More sharing options...
Oli Posted October 27, 2021 Share Posted October 27, 2021 On 15/11/2020 at 21:36, Nick Laslett said: That is a shame. I sent them 1 email asking them to recommend an architect familiar with their system and went from there. Thanks - Which architects did you find familiar with Thermohouse and which did you go with in the end? Link to comment Share on other sites More sharing options...
Nick Laslett Posted October 28, 2021 Share Posted October 28, 2021 (edited) 15 hours ago, Oli said: Thanks - Which architects did you find familiar with Thermohouse and which did you go with in the end? We are just having the roof panels installed right now. We used Thermohouse’s crew for the build as well. The architect we went with was Richard Hall at Arc8 Projects Ltd. Thermohouse has an in-house Structural Engineer, I feel this role is more critical, as ICF houses can be heavy. You can see the names of some of the architects from the case studies on the Thermohouse website. https://thermohouse.co.uk/projects/ I don’t feel that the architect needs to be familiar with the system, but the builders definitely need ICF experience. A lot depends on the level of handholding you are looking for; to obtain planning permission, appoint contractors, select suppliers etc. I choose the ICF build method and Thermohouse independently, so I needed people onboard who were going to support these decisions. Using the Thermohouse walls, floors and roof products can simplify things like air tightness, insulation requirements and services ducting because so much of this is delivered in their method. We wanted a poured concrete first floor with UFH and poured concrete stairs, this is fairly typical in a Thermohouse build. There are plenty of downsides to using ICF. One aspect of the Thermohouse approach is that all the wall length measurements need to be divisible by 150mm. Edited October 28, 2021 by Nick Laslett Link to comment Share on other sites More sharing options...
freshy Posted December 9, 2021 Share Posted December 9, 2021 On 28/10/2021 at 09:19, Nick Laslett said: We are just having the roof panels installed right now. We used Thermohouse’s crew for the build as well. How is your Thermohouse build coming along? Link to comment Share on other sites More sharing options...
Nick Laslett Posted December 12, 2021 Share Posted December 12, 2021 On 09/12/2021 at 20:58, freshy said: How is your Thermohouse build coming along? The panels are now installed. Some thoughts: This is my first build, so I have no experience of other methods. The roof boards went up very quick. They come pre-cut for length and pitch angle from the factory. Only the valley junctions need to be cut on site. They have a special circular saw with 30cm cut depth. Surprisingly on the flat sections the boards do not stop the water coming through. You need Wing Tek self drilling screws for attaching the battens, this is straight forward. Attaching the barge board to the gable ends is more tricky, screw depth is >170mm, the C section is 100mm high and you need to affix the board with 2 screws. With my tests I found that it is harder than you think to keep a drill perpendicular for that kind of depth of hole, easy to have 5mm of travel in your hole at that depth. I have a free AutoCAD DWG viewer on my iPad, DWG FastView. This has been an invaluable tool. Thermohouse have PDF and DWG files for most construction details: https://thermohouse.ie/download/thermoroof-details-cad-file-dwg/ When you look at the soffit detail, this is sort of backward to a normal roof, because there is no joist to affix too. The wall batten is the main fixing point. We have not done this yet. I will upload some pictures when I get the chance. 1 Link to comment Share on other sites More sharing options...
freshy Posted December 13, 2021 Share Posted December 13, 2021 On 12/12/2021 at 08:55, Nick Laslett said: I will upload some pictures when I get the chance. @Nick Laslett Thank you, this is useful information. Please do upload pictures ? Link to comment Share on other sites More sharing options...
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