OSB has become more common in southern places where snow loads are light.
I will never use it for roofing though. It will telegraph through the shingles and develope sags between rafters or trusses. The main reason it gets used is because it is cheaper by nearly half. But what I will do or what half the country is doing has no bearing on this case. The contract specifically called for plywood and a cheaper product was used. That makes for a very strong case in court. The very least you should get from him is a knee bending, begging apology and the cost difference between the two materials which would be anywhere from twelve to forty cents per sq ft of roof area. But I would be demanding more than that, because you will be looking at those sags for many years, if he leaves it there. There is a newer type of OSB Called Advantech that is stronger and has more moisture resistant glues that might be acceptable for roofing but that is still ourside the contract. I would measure carefully in my mind to decide whether he is merely careless and slovenly in his trade practices or whether he is a shyster who intentionally defrauded you to decide how to proceed. |
Moderated by Handyman 
