Show up prepared.
Inspect carefully, communicate clearly, and respect the homeowner’s time.
Local roots. Serious workmanship.
Built on the idea that the owner should still answer the phone.
JMA Exteriors grew from a local gutter service into a trusted residential roofing company serving homeowners across Chester and Lancaster counties.
Talk with John
Since 2018Owner-led local service
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John’s story
Lancaster County work ethic, carried into every project.
John Allgyer, JMA’s owner and estimator, was born and raised in the Amish community in Lancaster County. That background shaped a practical approach: be direct, do careful work, and leave the property better than you found it.
Today, JMA provides roofing, storm restoration, gutters, and gutter guards. The company remains intentionally local, with John close to the estimate, communication, and final result.
What JMA promises
The standard is simple.
Protect the property.
Use the right equipment, control the debris, and take cleanup seriously.
Stand behind the work.
Use proven products and support the installation with meaningful warranties.
Credentials that matter
Training, protection, and accountability.
Certification and warranty language shown here reflects JMA’s current public materials and should be confirmed before the production launch.
Owner / estimator: John Allgyer
PA contractor: PA15513
Service footprint: Chester & Lancaster Counties
GAF Certified
System Plus10year workmanship warranty
★★★★★
“John was excellent to work with. The roof was completed in the time frame promised. All of the work was done with extreme care and craftsmanship.”
★★★★★
“John responded and scheduled promptly. He is polite, professional, and accomplishes the job quickly yet efficiently.”
★★★★★
“A top notch company. Very polite and reasonably priced. High quality work and I would recommend John to others.”
Ready when you are
Work directly with a local roofing company.
Request a free inspection or call John directly. No pressure—just a practical next step.