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Top-Rated Natural slate roofing repairers in New Castle - Updated Nov 2026

Avatar for All Under One Roof
All Under One Roof
4.7(
131
)
Natural Slate Roofing - Repair

Serving New Castle, NH and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"All Under One Roof recently replaced my roof on a 3-story, 200+ year old Federal in Newburyport. It was a big job that entailed removing 3 layers of rolled roofing/asphalt shingles; removing original skylight & taking down old dormant chimney to roof line and roofing over both; installing ½ “ plywood and asphalt shingles over new roof. I can’t say enough good things about All Under One Roof. They had a great crew and did a fantastic job. In fact, my neighbor across the street who had a birds eye view of work in progress, then hired them to replace his roof. John Lanzafame, the company’s owner, is a jewel. He’s very professional, responsible and communicative – a “take charge” guy in the best meaning possible. I was completely comfortable and confident that I was in good hands, and did not have to worry about micro managing the work. I should also point out that All Under One Roof began work on date scheduled (a month in advance) and completed the job (start to finish) in short order. I highly recommend All Under One Roof. Have dealt with various contractors for numerous issues over the years as I own several rental properties, and this has been my most positive experience by far. Kathy Quill"
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+26

Response time6 hrs
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for True North Contracting
True North Contracting
4.4(
96
)
Natural Slate Roofing - Repair

Serving New Castle, NH and surrounding areas

Approved

In business since 2005

Free estimates

Small jobs welcome

"Would recommend this company to do any job. They are great and prices are very reasonable. They did an outstanding job on my roof. Would hire them again anytime"
Roof
Kitchen Reno
Finish
Ready for Grout
 Finished

+66

Response time7 hrs
14 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Tar Star Roofing
Tar Star Roofing
4.9(
77
)
Natural Slate Roofing - Repair

Serving New Castle, NH and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Tar Star Roofing (Anthony) responded in one day, inspected my roof and provided a quote the next day. The crew started work a couple days later, very professional, experienced and courteous. They completed the job on time and to my complete satisfaction. Communications from Anthony were constant, including recommendations on additional repairs as damage was found, photo documentation and expert advice. I highly recommend Tar Star Roofing for any roofing needs."
Response time10 hrs
Response rate97%
16 neighbors recently requested a quote
Avatar for Power Home Remodeling
Power Home Remodeling
4.6(
888
)
Natural Slate Roofing - Repair

Serving New Castle, NH and surrounding areas

In business since 1992

Free estimates

Warranties offered

"We had fantastic experience getting our roof replaced. Dan helped us out with a great presentation, and everything that was promised was delivered. The crew represented the company well with the install. We would definitely recommend to anyone looking for a roof."
Full Home Facelift
Full Home Remodel - Siding, Windows, and a Roofing system
Full Home Facelift
Full Home Remodel - Siding, Windows, and a Roofing system
Full Home Facelift

+34

40 neighbors recently requested a quote
Recommended by93%of homeowners
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FAQs for natural slate roofing repair projects in New Castle, NH

If more than 30% of your slate roof is damaged, it's time to consider a full replacement. This will prevent further deterioration and avoid costly recurring repairs. A professional slate inspection (costing between $130 and $360) can confirm whether repairs are sufficient or if a full roof replacement is the better option.

A slate roof can last anywhere from 60 to 150 years, depending on factors like installation quality, regular maintenance and repairs, and local weather conditions. Compared to materials like clay and concrete, which often last around 50 years, a well-maintained slate roof offers superior longevity, durability, and long-lasting aesthetic appeal.

Yes, you can use temporary patch solutions, such as roofing cement or patchwork, to provide immediate relief for minor leaks or underlayment issues observed from inside your home. However, these provisional fixes do not replace the need for a permanent, professional exterior repair, which is necessary to ensure the long-term integrity and weather resistance of your slate roof.

The New Castle, NH homeowners’ guide to natural slate roofing repairs

From average costs to expert advice, get all the answers you need to get your job done.