raising concrete floor 70mm

[robinbanks]

My experience with it is that although it says "60 days" it is to all intents totally waterproof

I've a sheet of a competing board from egger, that's lived outside for 8 years now, and it still bears the weight of anyone who walks over it.

No idea what resin they glue the chips together with but I expect we'll see images of a sheet of it jammed in a whales mouth one day, probably 20 years hence