You put the building cladding, whatever it is, outside the foam. So usually from inside out: a wall, foam on wall, drainage screen, cladding. Can be brick, wood

You put the building cladding, whatever it is, outside the foam. So usually from inside out: a wall, foam on wall, drainage screen, cladding. Can be brick, wood, whatever. There’s also exterior foam cladding that’s made to be open to the elements but it doesn’t look great or last a long time either.