Fully-covering wall insulation on top of the studs significantly reduces cold bridges and the amount of moisture on the wooden studs. We call this construction a Nordic Wall - our number one recommendation for a wooden structure. In a Nordic Wall the desired U-value can be achieved with a thinner structure compared to other wooden structures.

A wooden panel allows high air movements in the ventilation gap. Therefore we recommend the use of low air permeability products, such as PAROC WAS 25t or PAROC WAS 35t on top of the studs.

The role of the internal air and vapor barrier is essential in this structure: together with the wind barrier it is the only air tight structural layer.

> Design and installation guideline

internal facing air and vapour barrier wooden stud 50 mm x thickness, c 600 + PAROC UNS 37 PAROC WAS 25t ≥ 30 mm or PAROC WAS 35t  ≥ 30 mm  or PAROC WPS 3n nail batten + ventilated gap ≥ 20 mm  wooden panel