Passive House Floor Insulation

3 200mm kingspan insulated.

Passive house floor insulation.

Typical conventional insulation materials mineral wool polystyrene cellulose require layers of about 30 cm. Even a straw bale wall of 50 cm or more would be suitable for the passive house. Whilst this can be prohibitive on small plots it s worth noting that only outer walls need to be insulated to this level so an open plan design can combat the loss of space from thicker walls. The thickness can even be reduced to 20 cm with common polyurethane foam insulation materials.

Insulation and ventilation are both important components in the design and build of a passive house but there s still much more to it. The heat loss is indeed that very low it has been calculated and the buildings can be kept comfortable using the calculated low heat production capacity. 1 foundation detail at denby dale the uk s first certified cavity wall passive house with a lightweight insulating concrete block at the wall to floor junction. To hit passive house insulation standard in sweden for example walls must be at least 335mm thick with insulation to get the desired effect.

A passive house is a building for which thermal comfort iso 7730 can be achieved solely by post heating or post cooling of the fresh air mass which is required to achieve sufficient indoor air quality conditions without the need for additional recirculation of air. The monitoring of built passive house has shown that the insulation effect of the thick insulation layers meets exactly the expectation.