if you're going to advertise your services here, at least give the owners of the forum a few bucks
What is this ?
what exactly is a 4001 certificate, a local gc asked me to fax him my wsib and 4001 certificate, is it an ISO rating? i cannot find any information online about this and asked a few of my other contractor friends and everyone is clueless. 
He is a large builder with a hundred contract houses lined up.
He is a large builder with a hundred contract houses lined up.
