Keller Construction has done four repairs on four different roof and siding jobs of mine. He had to repair a leaking slate roof and a leaking flat roof and replace an old flat roof and leaking siding on dormers in three different properties. He did an excellent job on all four roofs in a highly competent, efficient and professional manner. In addition to providing a top notch professional job, he charged a more than fair and reasonable price. Sherman Keller is a nice, honest, personable man that genuinely cares about his customers, their homes and providing high quality work. You just can't say that anymore, about the majority of contractors. If you want someone you can trust, who will give you a very reasonable price and deliver the quality job promised, Keller Construction is who you want to hire. I have rental properties in Montgomery County, Delaware County and New Jersey and he is now my "Go To Man" for all my roofing and siding jobs!