Top-rated natural slate roofing installers and replacers.

Get matched with top natural slate roofing installers and replacers in Alton Bay, NH

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Natural slate roofing installers and replacers in Alton Bay - Updated Nov 2026

Roofing
New to Angi
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

Approved

Experienced Roofer, siding expert , crews on demand, capable of building decks, replacing windows and doors and doing full construction builds in any exterior remodeling. Snow, ice dam removal, leak mitigation, and repair as well as roof shoveling in the winter.\n\nAll jobs commercial/ residential/industrial\n\nFully licensed and insured

2 neighbors recently requested a quote
Avatar for Paragon Roofing, LLC
Paragon Roofing, LLC
4.4(
43
)
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

In business since 2019

Free estimates

Emergency services offered

"I needed a small repair, due to a less than stellar original install (unknown contractor) when the home was built. Paragon came out in a timely manner and repaired the roof quickly and professionally. I plan to use them this summer when I contract for the roof replacement. Very satisfied with their work."
New Construction
Above view
Copper Cricket
Copper Cricket
Standing Seam

+1

Response time3 days
Response rate89%
Recommended by97%of homeowners
Avatar for F.B.I. Contracting LLC
F.B.I. Contracting LLC
4.9(
52
)
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Frank and Nick did an excellent job replacing a window, installing snow guards, and completed roof repairs to make the house weathertight for me. They showed up when they said, worked very efficiently and got everything done quickly. Pricing is very fair and quality workmanship. I have used F.B.I. a couple times now and know I will use them for future projects."
Additional Photos
Additional Photos
Additional Photos
Recommended by100%of homeowners
New England Gutter Systems
4.8(
15
)
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"I was originally told by another company that the gutter needed to be replaced and after discussing the problem with New England Gutter Systems they were able to fix the issues and clean the gutter for hundreds less than a replacement would have cost. They were very prompt and friendly making all the needed repairs quickly after speaking with them. It would have been easy for them to just go with my initial thought of a new gutter but made sure they solved the issues without that added unnecessary expense."
Recommended by93%of homeowners
Eastern Construction Co
4.2(
85
)
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

In business since 1962

Free estimates

Credit card accepted

"I was satisfied. I thought they did a great job. They definitely cleaned up after themselves and gave us heads up when they were going through each room. The project manager was very helpful. He took care of whatever complaints or things that needed to be addressed. He made sure it was done."
Recommended by86%of homeowners
Avatar for Sentry Roofing NH
Sentry Roofing NH
4.4(
25
)
Natural Slate Roofing - Install or Replace

Serving Alton Bay, NH and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"Team arrived earlier than expected, and easily finished the whole roof in the day. One week later and still haven't found any debris larger than a quarter in the yard, and no nails. I got compliments on the new roof less than an hour after it was installed."
Recommended by90%of homeowners
...
Showing 1-10 of 57
FAQs for natural slate roofing installation and replacement projects in Alton Bay, NH

A slate roof features thin tiles of natural stone installed over a solid deck and underlayment. Formed under intense heat and pressure, slate is exceptionally durable and delivers a distinctive, high-end look. Because the material weighs far more than asphalt, most homes need added structural support before installation. 

While upfront costs are higher and routine inspections are a must, many homeowners choose slate for its unmatched longevity and curb appeal.

Slate stands out for its 50- to 200-year life span, low maintenance, and classic aesthetic. It’s fire-resistant, energy-efficient, and often boosts resale value. 

On the flip side, slate runs far more per square foot than asphalt, weighs up to four times as much, and demands a contractor who specializes in the material. Tiles can crack on impact, and repairs cost more because the work is slow and precise. If your budget and structure can handle it, slate delivers top-tier performance for generations.

Natural and synthetic slate aim for a premium, stone-like appearance, whereas asphalt focuses on affordability. Real slate runs $10 to $30 per square foot installed and lasts up to 200 years; synthetic slate costs $10 to $15 and tops out at 50 to 100 years. 

Standard asphalt averages $3 to $8 per square foot and needs replacement every 20 to 30 years. If you want the slate look without the full price tag—or extra roof weight—synthetic is a solid middle ground.

With routine inspections and prompt repairs, a natural slate roof can last well beyond 100 years; some hard-slate installations reach the 200-year mark. Soft slate falls in the 50- to 125-year range, and synthetic products last 50 to 100 years. 

Remember, flashing, fasteners, and the underlying structure may need attention sooner than the stone itself. Severe hail or fallen limbs can also shorten life span, so schedule periodic checkups with a slate-qualified roofer.

If you plan to stay in your home long term—or want a standout selling point—slate delivers strong value. Although installation costs are high, owners often recoup 60% to 70% at resale and enjoy lower replacement cycles than asphalt. The stone’s durability, energy efficiency, and timeless curb appeal also appeal to eco-conscious buyers because fewer roofs end up in landfills. Just be sure your framing can handle the weight and that you budget for occasional specialty repairs.

Skip the DIY climb if you have a slate roof. Slate may be tough against the weather, but a single misplaced step can crack a tile and create a leak path. The surface also turns slick when wet, upping the risk of injury. Professional crews use staging and hook ladders that spread weight across multiple slates, protecting both the roof and the worker. To inspect or repair slate, call a roofer who specializes in the material.

The Alton Bay, NH homeowners’ guide to natural slate roofing installations and replacements

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