A-Value representing water repellent treatment of the facade.

[l.clapham]

Hello,

I've been modelling the application of brick cream using the guidance in "https://wufi.de/download/guideline/Guid ... 260701.pdf". This proposes using an A-value of 0.1 kg/m²√h for the outer construction layer.

However, I have recently noticed that in "https://wufi.de/download/guideline/WUFI ... 251202.pdf" it is recommended to use an A-value of 0.5 kg/m²√h.

Which is the most appropriate value to use? Thanks in advance.