Here's a customer review and testimonial for roof repair work in Wellesley Ma. Bob Scribner with GF Sprague recently sat down with the homeowner to see how we did on our roofing project we recently completed. How did everything go? "Fantastic" For all residents of Winchester Ma., G.F. Sprague provides an industry leading 40 year handiwork warranty for all its work. This 40-yr. guarantee is more than two times other roofing companies supply in Winchester Ma. G.F. Sprague is able to provide a 40-yr service warranty due to our comprehensive training, accreditations, and experience. We are among a couple of contractors who carries a DCAM License (# 08-0165).