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Top-Rated Roof sealant application pros in Portsmouth - Updated Nov 2026

Avatar for All Under One Roof
All Under One Roof
4.7(
131
)
Sealant for Roof - Apply

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"John came in today on a holiday day to check my roof. He is a very honest man. He told me my roof is still good for another two years, and doesn’t need any repairs at this time. I highly recommend him for any roofing projects. Thank you John!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+26

Response time6 hrs
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Revive Roofing & Siding LLC
Revive Roofing & Siding LLC
4.5(
44
)
Sealant for Roof - Apply

Serving Portsmouth, 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."
winsor NH
winsor NH
winsor NH
winsor NH
winsor NH

+40

Response time8 hrs
Response rate100%
41 neighbors recently requested a quote
Avatar for Adam Vaillancourt Roofing & Gutters - Milford
Adam Vaillancourt Roofing & Gutters - Milford
4.9(
13
)
Sealant for Roof - Apply

Serving Portsmouth, NH and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2004

Free estimates

Small jobs welcome

"Adam Vaillancourt Roofing was the 3rd roofer to inspect my very simple repair job (replacing a single edge shingle) and the estimator (Adam) was the only one of the 3 to offer a repair right away. I hired him on the spot and he completed the job in about 1/2 hour for less than what the others quoted. Very happy with the outcome. Would hire this roofer again."
During
During 2
Before
After
After

+7

Response time12 hrs
Response rate100%
84 neighbors recently requested a quote
Marquis Roofing
4.8(
30
)
Sealant for Roof - Apply

Serving Portsmouth, NH and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"First and foremost we choose Marquis Roofing for there excellent customer reviews. We were going to get 3 quotes from different companies, but after meeting Tom we knew we had the right company for the job. The roofing job was quite intricate to say the least, but Tom looked at it and figured out the best way to fix the leak. Knowing how difficult this job could be I asked Tom if he would be there to supervise, he said he would to ensure the job would be done well. That clinched the deal for my husband and I. I knew then Tom had high standards for his company and his customers. No further quotes were needed. Tom & his crew were very professional & hardworking. They finished the job in one day, wouldn't even know they were here. Everything was perfectly done from start to finish. I would highly recommend Marquis Roofing to anyone looking for an excellent company to work with. The price was very reasonable for the amount of work that was needed to complete the job. Tom has an excellent crew as well. They are very knowledgeable, with good workmanship qualities. Thanks to Tom & his crew for a job well done!!!!!!!!!!!!!!!!!!!!!!!!!!!"
beautiful but tricky
beautiful but tricky
beautiful but tricky
Additional Photos
Additional Photos

+104

Recommended by100%of homeowners
Avatar for Tar Star Roofing
Tar Star Roofing
4.9(
77
)
Sealant for Roof - Apply

Serving Portsmouth, 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%
8 neighbors recently requested a quote
Avatar for Cornerstone Roofing
Cornerstone Roofing
4.7(
82
)
Sealant for Roof - Apply

Serving Portsmouth, NH and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Returned initial inquiry call immediately. Asked very good questions to determine our needs. Estimate was well presented and all licensures and references readily offered. Extremely professional. Hiring for another roofing project"
Removal utilizing some of our innovative equipment
Getting started with kevlar reinforced tarps
Replacement of large damaged section
Setting stock in a hard to reach spot. Crane work
Removal utilizing some of our innovative equipment

+19

Response time1 day
Recommended by98%of homeowners
Avatar for Power Home Remodeling
Power Home Remodeling
4.6(
888
)
Sealant for Roof - Apply

Serving Portsmouth, 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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Showing 1-10 of 103

The Portsmouth, NH homeowners’ guide to roof sealant applications

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