So, my 44mm interlocking summer house was a bit of a disaster. Guys who did concrete made it wrong size, also not level at all. Builders of summer house completely ignored that and built it anyway, badly. I took whole thing down rebuilt it on subrame on concrete blocks. Constant airflow now underneath. But.. it leaks though corners still in rain, tried sealant which cracks and pulls out of place when wood moves. So thinking of cladding it, good idea? Just want to damn thing rainproof.