Hansons stands behind the work we do; that is why we spare no expense in guaranteeing quality installation. The best product in the world will not do its job, unless it is installed properly. Cheap, shoddy work is common in the siding industry, but at Hansons, you will get top quality products installed as they are meant to be, all at a low price. We guarantee our work in writing! http://www.hansons.com/Vinyl_Siding.htm#back