Problem
For complete peace of mind even treated timber needs to be kept in a dry environment.
Poor detailing and bad construction may lead to water penetration of the facade, which if allowed to reach the timber frame, may result in rot and at worst, structural failure.
Interstitial condensation may form within the structure when insulation is not placed in the correct position. Timber constructions often rely on a vapour barrier on the warm internal face.
The NHBC recommend and require that a ventilated and drained cavity be installed between the cladding system and the timber frame. The ventilation helps control the moisture levels of the timber. As the cavity is ventilated, there is no benefit gained by insulating outside of the cavity.
Solution
Insulate and finish with weber.rend MT
Insulate the frame within the stud, provide a minimium 40 mm cavity (20 mm if backed by breather membrane or similar). Fix suitable sheathing board spaced off to create drained/ventilated cavity and finish with weber.rend MT.
