Breathable Paint For Brick. Woodwool boards - great for infill panels. Limewash Clay Paint and Silicate Mineral Paint.
In practise these Sd values in the lower range are NOT very breathable at allWater Absorption Co-efficient W Kgm2h05. Its not suitable for exteriors though - for that you need to stick with limewash. I mean that bricks breathe naturally expelling moisture from the wall.
The diffusion equivalent air layer thickness specifies how thick a layer of air with the same diffusion resistance would have to be.
This is because of the risk of water entry which can cause severe damage. Like us bricks need to breath to remain healthy. BEECK mineral silicate paints chemically bond to the bricks becoming an integral part of the masonry and. We have removed lots of Masonry paint see Removing Paint from Brick Walls.