"I want to take a minute to write and let you know how pleased we are with the new insulated rubber roof as well as the repairs to our copper gutter and window flashing on the lateral bay windows. With all of the rain that we have been having since the roof was installed, we are pleased to say that we have not had a single drop of water inside. Please use this letter as a positive reference for your work product and have potential clients contact me if they would prefer to discuss this project in person."