#1 Products. Does the company use the best products available to them, and are they authorized by the manufacturer to use there products. Here at Harley's we are Owens Corning Preferred Contractors and G.A.F. Certified Installers. Meaning we can offer you better warranties on the products we install.

#2 Installation . We are Code plus contractors meaning we go above and beyond what is required by the  Michigan State Building Codes. We have over 15 years of hands on experience.

#3 Price. We provide you with top quality material and Code plus installation for the best price on the market guaranteed. Here at Harley's we don't use any sub-contractors there for cutting out the middle man and saving you money. It also allows us to be in control of the quality and installation of your job from start to finish.