Testimonials Articles

Air Conditioning Repair in Wilmington, DE 19805

February 21, 2024

“I have been a customer for 5 years now. This company is excellent. They make sure the job is done right. Their workmen are competent, knowledgeable, and courteous. When I have an issue with plumbing, the air conditioning equipment they installed, or anything else in my home, it is Joseph Frederick and Sons that I…

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Gas Stove Installation in Newark, DE 19711

February 15, 2024

“He did an amazing job, installing a new gas line and my new gas stove”

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Oil Furnace Repair in Brandywine, DE 19803

February 14, 2024

“I was impressed with John Ratcliffe. He listened attentively to me explaining our situation and offered various possible causes and fixes. All things considered, he assured me that our heater would be repaired that very evening. That was what I, as the customer, wanted to hear. Kudos to John! Olaf arrived and introduced himself. We…

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Sump Pump Installation in Wilmington, DE 19806

February 3, 2024

“Dennis was great!! Surely one of the best servicemen I have ever had. He replaced my 40 year old sump pump…was so efficient and knowledgeable. Because of him, I will use this company for other issues in the future.”

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Plumbing Repair in Other, 19808

February 2, 2024

“Excellent customer service. Professional and courteous. Dennis came up with a great solution for the bathroom shower issue until we are ready to do a full remodel.”

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Gas Furnace Maintenance in Bear, DE 19701

February 1, 2024

“Thank you, Donovan, for the excellent service. I appreciate your professionalism.”

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Gas Furnace Maintenance in Wilmington, DE 19802

January 30, 2024

“Want to compliment Lucas Kemp. He’s your first service tech to ever ask me if my radiators were all heating properly. Have owned my home since 1992 & have had furnaces serviced annually. Please pass this on to his supervisor. He was both courteous & pleasant. Hoping he does my maintenance next year.”

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Plumbing Repair in Newport, DE 19804

January 23, 2024

“Just wanted to write about the great service I received today. Dennis and Gabe were right on time, knowledgeable, did very clean work, and explained everything very thoroughly. In this day and age of poor service these guys are top notch. I have found my new plumbers!!”

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Whole-House Generator Maintenance in Greenville, DE 19807

January 23, 2024

“Andrew and Cameron, were punctual, arriving in A.M. Very polite, explained how generator would be serviced. Obviously had material/supplies on their truck to complete the jobl.. Andrew explained what they did today, and it was time for the annual maintenence service. I appreciate their courtesy, professionalism, efficient service. Thanks to Jos. Frederick & Sons for…

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Electrical Wiring Installation in Newark, DE 19711

September 26, 2023

“Clearly an experienced professional and expert in his field, very helpful in providing information that made our decision to proceed easier.”

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HVAC System Maintenance in Hockessin, DE 19707

July 15, 2023

“Donovan came on time and with the repair part. He diagnosed the problem over the phone. He finished the work in about 30 minutes. Excellent job!”

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AC System Repair in Greenville, DE 19807

July 13, 2023

“I had an AC issue and Donovan H from Jos Frederick and Sons did a great job at diagnosing the problem and fixing it on the spot. Very impressed by his knowledge and professionalism.”

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