G.B.R. is one of , if not the best co. I have used in many different construction jobs i have had. Always answer never really delayed , unless weather has an effect on timings. Professionals on a different level, as if no roof or existing roof they show up do the best work at a speed and as if naturally paced to finish the job leaving no trace of them behind. Not a referral but the only referral to give for top notch affordable construction. A++