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 did a fantastic job on my roof and also did an awesome job cleaning up after themselves. I Haven t found a nail or old shingle anywhere. If it wasn t for the new roof I wouldn t have known they where there. They also do other projects and I will contact them for any other work I need. I highly recommend Brian and his crew."
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
"Would I recommend JP Carroll roofing absolutely. They all were very hard workers. From start to finish. Bent over backwards to help on any thing you ask them to do."
+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
"Kevin and his team were professional, friendly and did a great job cleaning the moss and pine needles off the roof and gutter guards."
Serving Alton, NH and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2004
Free estimates
Small jobs welcome
"This team took the time to really understand leaky roof problem before considering the repairs."
+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.
