Small but mighty | Passiframe
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Small but mighty


Small but mighty

Compacfoam – you may have heard of it but for those of you that haven’t, don’t let the word foam throw you off……

On our latest project the timber frame structure will be sitting on a concrete raft slab. The build will feature large patio doors weighing almost half a tonne (450kg) so the door threshold here is important. We cannot simply sit them onto concrete as is standard for many new builds, the heat loss, condensation risk and poor comfort from a cold floor are all designed out in a Passivhaus. These small details matter.

The solution is to sit the doors on a polystyrene (named Compacfoam) that has been heated to a temperature at which it becomes dense enough to display compressive strength so we can in effect sit the door on an insulation material.