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About

John Allgyer, Owner/Estimator of JMA Exteriors, LLC was born and raised in the Amish community in the heart of beautiful Lancaster County. With 6 years of experience, JMA Exteriors grew from a gutter service business to providing quality roofing solutions to all our residential customers in Lancaster, Chester, and surrounding areas. Whether it’s installing gutter guards, replacing gutters, roofing repairs, or a new roof installation, we offer a 10-year workmanship warranty on all our work. We want you to know that your home is in good hands. No matter size of the job, our services do not end with the installation or repair. Contact us today for a free estimate or quote.

Our Promise

JMA Exteriors is dedicated to leaving no mess behind. Our Equipter RB4000 roofing trailer can navigate your property without damaging anything and help us ensure a proper clean up. At JMA Exteriors, our mission is simple: to provide high-quality services for our valued clients. Our team goes above and beyond to cater to the specific needs of each project. Through open communication and exceptional service, you’ll find what you’re looking for with our exterior services.

JMA Exterior'S HomeAdvisor profile

HomeAdvisor Screened & Approved Member

With more than two million verified pro reviews and one of the industry's most comprehensive screening processes, HomeAdvisor gives you the peace of mind that comes from knowing you hired a pro you can trust. JMA Exterior is proud to be a screened and approved member of HomeAdvisor.


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GAF Certified

The leading roofing manufacturer in North America, GAF has manufactured and sold a wide variety of high-performing residential and commercial roofing products that exceed customer expectations for over a century. KCSI Construction is proud to be certified by GAF, demonstrating advanced knowledge and experience with their products.


Fully Insured & Licensed Contractor

PA Contractor Number PA15513

GAF Certified Installer

Quality Workmanship & Results
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As a GAF Certified Company and with our 10-year workmanship warranty on all our work, you can count on JMA Exteriors for your next project. We take pride in protecting your property while offering efficient debris removal with our advanced Equipter roofing trailer.
Proudly Serving The Main Line, Including Lancaster, Chester & Surrounding Counties