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When I renovated my house (temperate EU climate), this was actually mandatory: active ventilation and breathing vapor shield in front of the insulation layer.
by yvdriess 4y ago
When I renovated my house (temperate EU climate), this was actually mandatory: active ventilation and breathing vapor shield in front of the insulation layer.
Indeed, older houses rely on "gravity ventilation", as my architect described it: high-temp heating is used to move stale air around by induction, plenty of nooks and crannies together with the density gradient would suck in fresh air.
When you renovate partially, adding insulation layers and plugging holes, you need to open up the windows for about 5-10 minutes once or twice a day. Paradoxically, the heat loss is mitigated because the fresh air is typically drier, which heats up easier.
- teekert 4y agoI'm doing it all myself so there is no real "mandatory", contractors will do it properly of course and by the rules (at least they should, but I sometimes wonder how careful they are taping all small holes on the inside of the insulating layer with aluminum tape, etc). People doing it themselves, I feel, just put mineral wool everywhere. Quite unwise, I hear some alarming stories. But I really spend a lot of time reading and thinking. I am insulating my roof, insulated the ceiling. But CO2 buildup is very rapid in the living room now, even though there are 2 large ducts in the wall leading directly outside (easily >1500 PPM while cooking and the 4 of us in the room). So I'm looking at installing stuff like this now: [0]. Imo such things are very necessary and I feel that many people "modernizing", insulation their own house are inviting a lot of issues. [0]: https://blaubergventilatoren.de/en/series/vento-expert-a50-1-w https://blaubergventilatoren.de/en/series/vento-expert-a50-1...