Choosing the wrong type of facade paint can end up trapping moisture inside the wall instead of protecting it, so it's worth being clear on the differences before quoting.
Breathable paint: lets the wall breathe
Breathable paint (silicate or siloxane) lets water vapour leave the wall to the outside while repelling rain, which makes it very suitable for traditional masonry facades or old buildings where there is interior moisture that needs to escape.
Waterproofing paint: seals the surface
Waterproofing paint forms a more closed layer that blocks water ingress, suitable for walls without an interior damp problem or for specific, highly exposed areas (parapets, finishing details). Using it on a wall with damp of interior origin can worsen the problem by not letting the vapour out.
Elastomeric: for facades with hairline cracks
Elastomeric paint adds elasticity to the film, able to cover hairline cracks of up to 1-2 mm without them reopening, widely used on facades with slight surface cracking where a larger repair isn't worthwhile.
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