I recently gave an estimate for an addition to a customer who said it was between me and another contractor. The other contractor was offering a lifetime warranty on all parts and labor. I was floored that someone would offer this. They wanted to know if I would offer the same and of course I said no. I was not going to offer a warranty for material that the manufacture would only warranty for 1 yr. But it did get me thinking about offering more then a 1 yr. warranty. When you buy tools, appliances, auto's they offer extended warranties for a fee. So I was thinking about offering extended warranties for a % of the final cost. Anyone fool with this idea?