4.3 
244 *The Angi rating for Roofing companies in Alton, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.
*The HomeAdvisor rating for Roofing companies in Alton, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Roofing needs.
Last update on November 30, 2025
Serving Alton, NH and surrounding areas
Approved
In business since 1945
Free estimates
Warranties offered
"Excellent work and lifetime warranty . Highly recommend Long Roofing."
Serving Alton, NH and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Brian and his crew worked really hard and finished my roof in one day despite a rain delay. They did an excellent job and when they were done everything was back in place and cleaned up. My roof looks fantastic and I know it is one less thing I need to worry about."
Serving Alton, NH and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"Quality firm that does great work. They put a new roof on 12+ years ago and recently came out to give us a "tune-up". Cement roof tiles. Looks like new. No issues and very responsive. Good folks."
+40
Serving Alton, NH and surrounding areas
Approved
Super Service Award Winner
In business since 1988
Free estimates
Warranties offered
"Kevin and his crew showed up early and got right to work. Finish product is looking great. There was a small issue with a few of the baffles in the attic not being secured correctly and Kevin took care of it quickly. Would definitely recommend JP Carroll."
+14
Serving Alton, NH and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"They do not install standing seam metal roofing."
+4
Serving Alton, NH and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"Really needed a new roof after this winter. These guys were knowledgeable and got me on their schedule relatively fast. Workmanship was high quality and the crew was extremely professional. Absolutely will call again when it is time to replace my siding."
+21
Serving Alton, NH and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"Paragon Exteriors was prompt on giving me a quote. They arrived next day and completed job in timely fashion. Could not be happier! Thank you Anji!"
Serving Alton, NH and surrounding areas
Approved
In business since 1994
Free estimates
Offers commercial services
"Excellent team and communication for our roof project. We needed someone to repair our roof that has shingles thats been needing repair and they were able to deliver and spring into action within a day ! It was perfect as the rains were coming and the damage to our roof would have gotten worse. From the time I first communicated they were able to arrive and give us an estimate and work with our insurance company (which was not easy) in the same day. Highly recommend this company ! Thank you"
Serving Alton, NH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2004
Free estimates
Small jobs welcome
"Called Adam Vaillancourt Roofing to fix a leak in our roof based on their consistently high customer satisfaction ratings. We met with sales rep Jose Luna, who conducted a thorough inspection and found the leak easily. His presentation about the company and how they do their work was impressive and Jose was very professional and included a video that Jose shot while on our roof in which he explained not just the issues that were found but WHY the work was needed. He never pressured us into agreeing to anything. We signed a contract immediately. Fast forward a few weeks later and Paul Camarro and his crew showed up at the house on time and ready to work. When they were done, Paul showed us photos of the completed repair work, so I knew they delivered as promised. We will absolutely be calling Vaillancourt in a few years when our roof needs to be replaced. Highly recommend!"
+7
Serving Alton, NH and surrounding areas
Approved
In business since 2011
Free estimates
Credit card accepted
"Madeline and Freddy came to my house to take a look at the siding and were professional and gave me lots of good info."
From average costs to expert advice, get all the answers you need to get your job done.
A new roof improves curb appeal, increases home value and keeps your living space protected from the elements. Learn about average roof replacement costs to set your budget.
The average cost of roof repair for U.S. homeowners averages between $386 and $1,875. Learn what factors can affect roof repair costs.
Wondering about the cost to tarp a roof after a large storm or before a major roof renovation? We'll break it down by size, style, and scenario.
All of the parts of your roof work together to protect your home. Learn the anatomy of a roof and how each part functions.
Building a roof is a serious but rewarding project. If you're up to the task, use this step-by-step guide to learn how to build a roof without the help of a contractor.
Roof leaks are an emergency, so knowing who can tarp your roof quickly and correctly can save you from major water damage if you ever experience a leak.
