If you have a building of any size it would be worth obtaining a manufacturer’s warranty for many reasons (previously specified). In the previous section we listed a number of manufacturers that have all been around for a few decades. There are other manufacturers. Check them out carefully as you would any other company you expect to do long term business with. Do their products have a track record? What is the size of the company? Does it have reserves specifically set aside for warranty payments – if so how much? Confirm they will send an inspector out to look at the finished roof. The web sites of manufacturers have a wealth of information as to what their products are and what the different warranties are. Watch out for new products without a proper track record. Lab testing does not equate to what a product experiences in the field – there are just too many variables to account for.