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Willus

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Everything posted by Willus

  1. Hi Everybody I'm wondering if anyone in the forum has already solved this problem. We have ICF walls with a wall plate that in the architect drawings will be set level with the ICF block i.e. the top of the wall plate will be at the same height as the insulated part of the blocks either side and the trusses will be in contact with both the wall plate and the insulated blocks. Above the trusses will be a warm roof with the insulation going past the position of the wall plate towards the eaves. This however leaves us with the space between the top of the wall plate/ ICF blocks and the insulation laid above the trusses that we need to insulate. We have a shallow pitch to the roof of about 15 degrees so the space is fairly tight. Our relationship with our architect went south some time ago, and based on the experience we have had he would not have created the right detail anyway, so we are working with our builder directly. We have discussed a number of options from trying to notch the ICF and only pour the concrete to lower height to enable us to then angle cut it to the angle of the trusses once they go in, retro fitting PIR into the space between the trusses with required angle cuts or using mineral wall to pack out the area. VCL layer will obviously be internal to all of the insulation. Any thoughts on the best approach - what else have people done? Thanks Will
  2. @ProDave I was thinking was that if only x% of the heat transferred into the loft space it would have a lower temperature with the warm roof then acting as the main barrier to the outside. That was just based on 'gut thinking' which I was not sure was realistic hence the question to the group on the impact. Whilst I guess that the temperatures would equalise over time between the rooms and the loft when initially heating the rooms my assumption was that it would allow the rooms to heat faster. That said given we are going for much lower flow rates and a slow heating approach so I need to stop thinking about things in the way I would in a less energy efficient / air tight house. Have you found any issues with noise transference between the rooms via the loft if you only have plasterboard, plaster & paint on the ceilings? Thanks
  3. @JohnMo - we did think about having it completely vaulted but I lost that discussion. I did not push too hard as I am scared of heights and did not fancy that much decorating at height the internal apex is about 3.8m. HeatPunk seemed to suggest that if we fully insulated above the ceilings that it would change the heating demand by about 12% although if we insulated to that level it definitely would cause issues with temperature in the loft space. I think I will probably just limit the activity in the loft to a level of sound proofing and a bit of flooring for storage but no more than that. On the external barrier - the insulation is continuous between the warm roof and the ICF, which also goes down to below ground to act as the perimeter barrier for the slab. As our roof overhangs the walls by about 1m we do have a bit of finessing to do around the point at which the trusses land on the ICF walls to make sure the detailing is correct for the air tightness and vapour layer. Thanks for the feedback
  4. @Tom yes we bought the property with Part Q permission but the limitations meant it was going to be hard to hit sensible level of insulation etc so we then went for the full planning so we could do it properly. We are also going to be using Nudura so fingers crossed for no blowouts when we get to the pour stage 🫣. The chickens are long gone so just one dog to keep in check
  5. We have a single story barn style new build which will have a warm roof across all of the property. Communal part of the building will be vaulted up to the warm roof but the more private areas such as bedrooms will be normal 2.4 height with a plasterboard ceiling and then a loft space with trusses. Can I reduce the heating requirement of the building by insulating above the ceiling to the bedrooms so that we are not heating right up to the warm roof in that area? It would make the loft space unheated / less heated but do I risk creating a moisture issue in the loft space? My thinking was that if I could get the insulation layer right the loft space would still be heated from below but just to a lower temp than if we just have plasterboard but no so cold that we risk condensation. We will be ventilating the rooms below by MVHR so hopefully will keep humidity at sensible levels so not too much moisture is moving into the loft space. I did try so see if there was already a topic / thread covering this but I could only see ones on flat warm roofs and impact of insulating under them. Any thought or resources you could point me at. Thanks
  6. Hi everyone - we are doing a self build replacing a single story 15 year old Chicken shed with a ICF new build. The end property will be of the same dimensions as the original chicken shed and maintain the look of a farm style building. We are using single contractor to do the foundations for the ICF, the ICF walls and also a warm roof. It will then be over to us to do the work ourselves / liaise with specific trades. Hoping to pick the brains of the community on some areas where we have not yet nailed down our approach. We have completed the demolition and foundations and ICF walls due to go up in August. If we are lucky we will be weather tight during Nov so that we can work through the winter
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