WUFI

Hi there,

I have a historic brick cavity wall constructed in the 1950's. The two leaves of brick are separated by a 10-15mm unventilated air cavity. The outer face of the inner brick layer (facing the cavity) was originally painted with a a bitumen paint layer. It is assumed that this is a water ...

To add to this question, removing the unvented cavity between the insulation and the glazing unit delivers much more stable results. Ie equilibrium is acheived within two years and the annual cycle of total water is regularly repeated.

Therefore, this raises the question of whether the unvented ...

Hi,

I'm looking at moisture accumulation in a wall constructed behind a curtain wall glazed panel. The wall assembly built in WUFI (from inside to out) is:

26mm plasteboard and plaster skim
0.5mm foil faced vapour control layer
150mm mineral wool in metal stud layer.
120mm unventilated cavity ...

Hi Christian,

This is fantasitically useful. I will implement the measures you suggest and see what happens. I was placing the air leakage into the cavity on the warm side of the sealed unitised facade panel rather than into the panel itself.

Regards

Nick

Hi,

I'm modelling a unitised facade. I'm aware that with non porous materials this doesn't fit what WUFI was originally designed for. The external wall assembly (from inside to out) is:

Plasterboard
vapour control layer
Air cavity (with SFS / metsec stud) (no additional moisture storage ...