Douglas Alpenstock wrote:Does your old concrete floor really need to be taken out? Everyone I know who has in-floor radiant heating would never go back. Could this be added on top, with a subfloor over it?
John C Daley wrote:Are you using hydronic heating?
water pumped though pipes to wall radiators.
Thanks for your replies, really helpful. About the walls. It's a system built bungalow meaning they made concrete panels and craned them onto foundation on site...I know that airtightness and vapour control layers are essential and can go really good or can turn out disastrous... you have to know what to use how where...I have lived in many buildings with mould here in Ireland(rented)...I am also aware of bigger overhang if we make the walls thicker...that's a bottleneck for us since the overhang is not too big on the house and for financial reasons we can not alter change the roof for now....I'll take a look into insulating the perimeter of the house. Thanks for the tip.
Eliot Mason wrote:Even if the slab/cement floor isn't insulated, you can greatly decrease the thermal loss by insulating the perimeter of the building. I recall seeing how many of the super-engineered PassivHaus designs have a 3' (or so) wide trench around the foundation. Some form of styrofoam insulation is added vertically, and then horizontally at the bottom of the trench. Appropriate system are added to move water out of there, and then its filled. This is effectively turning all of the dirt under the cement into a thermal battery.
something to consider.
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2021 RMH Jamboree planning thread!https://permies.com/wiki/148835/permaculture-projects/RMH-Jamboree-planning-thread