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  • Average homeowner rating star icon4.9
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  • Verified reviews icon14
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Alton Bay

Avatar for Northern Basement Systems

Northern Basement Systems

358 Gallison Hill RD
4.55(
20
)
Approved Pro

Northern Basement Systems

358 Gallison Hill RD
4.55(
20
)
Approved Pro
Customers say: Quality work
28 local quotes requested
15 years of experience

Matt Clark's Northern Basement Systems, locally owned and operated, is the leading basement waterproofing, crawl space moisture control, and foundation repair contractor in Vermont, New Hampshire, & Essex and Clinton County NY. We are accredited with the Better Business Bureau and maintain a consistent A+ rating. We offer quality basement & foundation work while providing outstanding service to each and every one of our customers. Basement Waterproofing Sump Pump System Crawl Space Repair Foundation Repair Concrete Leveling and Sealing Mold Problems.

"I strongly caution anyone considering doing business with this company. I gave them a deposit of $4,428.65, and when I canceled a week later they kept almost $900 of it even though my service was not for another 6 weeks. You do sign a very simple, clearly stated document that says, “Should you cancel beyond three business days, you understand your deposit is non-refundable. Northern Basements may choose to refund depending on cancellation circumstances.” I fully acknowledge that I canceled a few days outside that window, but I hoped an honest company that cares about customers and referrals would choose to provide a full refund. I am a sucker for hoping that. They chose to risk my impression, referral and review for $885.53. If nothing else comes out of this, I hope everyone reading at least goes in knowing that this statement on their contract is a real threat and your deposit is hostage. Even Airbnb’s offer full refunds on deposits within just a few days of people’s arrival date. 3 days to cancel with service not scheduled for 6 weeks out, “C’mon man.” No materials were used. No service workers’ time was taken. The manager justified the 20% withholding as credit card fees, restocking fees, time and resources for the estimate, and administrative fees. I wholly accepted responsibility for the credit card fees and time of Paul, the gentleman who performed the assessment, and I offered to settle at 10%. I still believe any reputable company would have provided a full refund at this point in a project, or at most deduct the credit card fees, because nothing more went into this beyond what would have normally been a free estimate. The further arguments the manager made for the additional fees were the scheduling of their team and allocation of materials for my project. Complete nonsense, especially when the project was not set for 6 weeks away. Because they had my deposit hostage, they had control of how much they decided they wanted to keep, it was completely arbitrary, and they kept almost $900 of my money without providing anything. If they wanted to cover their credit card transaction fees, fine, at most 6%, but the rest is absolute robbery. The only solace I can find in this loss of almost $900 now is that I didn’t spend another $13,000 with them. I tried to call Paul after speaking with the manager to ask if he could do me a favor and try to reason with the manager on my behalf because he seemed like a nice enough guy. No answer. No call back. I will never seek out this company’s services again and I will actively discourage others from doing so but, based on my experience, I expect they really don’t care."

Eddie R on January 2023

Matt Clark's Northern Basement Systems, locally owned and operated, is the leading basement waterproofing, crawl space moisture control, and foundation repair contractor in Vermont, New Hampshire, & Essex and Clinton County NY. We are accredited with the Better Business Bureau and maintain a consistent A+ rating. We offer quality basement & foundation work while providing outstanding service to each and every one of our customers. Basement Waterproofing Sump Pump System Crawl Space Repair Foundation Repair Concrete Leveling and Sealing Mold Problems.

"I strongly caution anyone considering doing business with this company. I gave them a deposit of $4,428.65, and when I canceled a week later they kept almost $900 of it even though my service was not for another 6 weeks. You do sign a very simple, clearly stated document that says, “Should you cancel beyond three business days, you understand your deposit is non-refundable. Northern Basements may choose to refund depending on cancellation circumstances.” I fully acknowledge that I canceled a few days outside that window, but I hoped an honest company that cares about customers and referrals would choose to provide a full refund. I am a sucker for hoping that. They chose to risk my impression, referral and review for $885.53. If nothing else comes out of this, I hope everyone reading at least goes in knowing that this statement on their contract is a real threat and your deposit is hostage. Even Airbnb’s offer full refunds on deposits within just a few days of people’s arrival date. 3 days to cancel with service not scheduled for 6 weeks out, “C’mon man.” No materials were used. No service workers’ time was taken. The manager justified the 20% withholding as credit card fees, restocking fees, time and resources for the estimate, and administrative fees. I wholly accepted responsibility for the credit card fees and time of Paul, the gentleman who performed the assessment, and I offered to settle at 10%. I still believe any reputable company would have provided a full refund at this point in a project, or at most deduct the credit card fees, because nothing more went into this beyond what would have normally been a free estimate. The further arguments the manager made for the additional fees were the scheduling of their team and allocation of materials for my project. Complete nonsense, especially when the project was not set for 6 weeks away. Because they had my deposit hostage, they had control of how much they decided they wanted to keep, it was completely arbitrary, and they kept almost $900 of my money without providing anything. If they wanted to cover their credit card transaction fees, fine, at most 6%, but the rest is absolute robbery. The only solace I can find in this loss of almost $900 now is that I didn’t spend another $13,000 with them. I tried to call Paul after speaking with the manager to ask if he could do me a favor and try to reason with the manager on my behalf because he seemed like a nice enough guy. No answer. No call back. I will never seek out this company’s services again and I will actively discourage others from doing so but, based on my experience, I expect they really don’t care."

Eddie R on January 2023


Avatar for Erickson Foundation Solutions

Erickson Foundation Solutions

14 Clement Road
4.56(
9
)
Approved Pro

Erickson Foundation Solutions

14 Clement Road
4.56(
9
)
Approved Pro
Customers say: True professional
49 local quotes requested
46 years of experience

Erickson Foundation Solutions is your local expert for ALL THINGS BASEMENTY! We specialize in basement waterproofing, foundation and crawl space repair, sump pump installation and maintenance, concrete lifting & leveling, as well as radon mitigation. When it comes to problems or ongoing issues in your basement, we offer permanent solutions! We are a family owned business that began in 1979, proudly serving New Hampshire, Massachusetts, and Rhode Island.

"They did a fantastic job! We have had driving rain since the installation and our basement is bone dry. They came on time, were very polite and I'm very happy with the fast train system they installed."

Chris T on November 2021

Erickson Foundation Solutions is your local expert for ALL THINGS BASEMENTY! We specialize in basement waterproofing, foundation and crawl space repair, sump pump installation and maintenance, concrete lifting & leveling, as well as radon mitigation. When it comes to problems or ongoing issues in your basement, we offer permanent solutions! We are a family owned business that began in 1979, proudly serving New Hampshire, Massachusetts, and Rhode Island.

"They did a fantastic job! We have had driving rain since the installation and our basement is bone dry. They came on time, were very polite and I'm very happy with the fast train system they installed."

Chris T on November 2021


Avatar for Groundworks

Groundworks

3 Eastpoint Dr Hookset
4.74(
93
)
Approved Pro

Groundworks

3 Eastpoint Dr Hookset
4.74(
93
)
Approved Pro
Customers say: Quick response
28 local quotes requested
29 years of experience

Groundworks, previously Rescon Basement Solutions, specializes in helping homeowners with their foundation repair, basement waterproofing, and crawl space encapsulation needs. Our top priority is providing high-quality home repair solutions and personalized service across New Hampshire and Massachusetts. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.

"Everything went very well. Josh, Dave and Tommy were very professional, efficient, and always willing to answer any questions I had. I can't recommend them highly enough."

Ken C on August 2025

Groundworks, previously Rescon Basement Solutions, specializes in helping homeowners with their foundation repair, basement waterproofing, and crawl space encapsulation needs. Our top priority is providing high-quality home repair solutions and personalized service across New Hampshire and Massachusetts. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation or basement.

"Everything went very well. Josh, Dave and Tommy were very professional, efficient, and always willing to answer any questions I had. I can't recommend them highly enough."

Ken C on August 2025


Avatar for Northern Basement Systems

Northern Basement Systems

358 Gallison Hill Road
4.33(
7
)
Approved Pro

Northern Basement Systems

358 Gallison Hill Road
4.33(
7
)
Approved Pro
Customers say: Quick response
28 local quotes requested
15 years of experience

Northern Basement Systems, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade, combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"I strongly caution anyone considering doing business with this company. I gave them a deposit of $4,428.65, and when I canceled a week later they kept almost $900 of it even though my service was not for another 6 weeks. You do sign a very simple, clearly stated document that says: should you cancel beyond three business days, you understand your deposit is non-refundable. Northern Basements may choose to refund depending on cancellation circumstances I fully acknowledge that I canceled a few days outside that window, but I hoped an honest company that cares about customers and referrals would choose to provide a full refund. I am a sucker for hoping that. They chose to risk my impression, referral, and review for $885.53. If nothing else comes out of this, I hope everyone reading at least goes in knowing that this statement on their contract is a real threat and your deposit is a hostage. Even Air b and bs offer full refunds on deposits within just a few days of their arrival date. 3 days to cancel with service not scheduled for 6 weeks out, Come on man. No materials were used. No service workers time was taken. The manager justified the 20% withholding as credit card fees, restocking fees, time and resources for the estimate, and administrative fees. I wholly accepted responsibility for the credit card fees and time of Paul, the gentleman who performed the assessment, and I offered to settle at 10%. I still believe any reputable company would have provided a full refund at this point in a project, or at most deduct the credit card fees because nothing more went into this beyond what would have normally been a free estimate. The further arguments the manager made for the additional fees were the scheduling of their team and the allocation of materials for my project. Complete nonsense, especially when the project was not set for 6 weeks away. Because they had my deposit hostage, they had control over how much they decided they wanted to keep, it was completely arbitrary, and they kept almost $900 of my money without providing anything. If they wanted to cover their credit card transaction fees, fine, at most 6%, but the rest is absolute robbery. The only solace I can find in this loss of almost $900 now is that I did not spend another $13,000 with them. I tried to call Paul after speaking with the manager to ask if he could do me a favor and try to reason with the manager on my behalf because he seemed nice enough. No answer. No callback. I will never seek out their services again and I will actively discourage others from doing so but, based on my experience, I expect they do not care."

Eddie R on January 2023

Northern Basement Systems, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade, combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"I strongly caution anyone considering doing business with this company. I gave them a deposit of $4,428.65, and when I canceled a week later they kept almost $900 of it even though my service was not for another 6 weeks. You do sign a very simple, clearly stated document that says: should you cancel beyond three business days, you understand your deposit is non-refundable. Northern Basements may choose to refund depending on cancellation circumstances I fully acknowledge that I canceled a few days outside that window, but I hoped an honest company that cares about customers and referrals would choose to provide a full refund. I am a sucker for hoping that. They chose to risk my impression, referral, and review for $885.53. If nothing else comes out of this, I hope everyone reading at least goes in knowing that this statement on their contract is a real threat and your deposit is a hostage. Even Air b and bs offer full refunds on deposits within just a few days of their arrival date. 3 days to cancel with service not scheduled for 6 weeks out, Come on man. No materials were used. No service workers time was taken. The manager justified the 20% withholding as credit card fees, restocking fees, time and resources for the estimate, and administrative fees. I wholly accepted responsibility for the credit card fees and time of Paul, the gentleman who performed the assessment, and I offered to settle at 10%. I still believe any reputable company would have provided a full refund at this point in a project, or at most deduct the credit card fees because nothing more went into this beyond what would have normally been a free estimate. The further arguments the manager made for the additional fees were the scheduling of their team and the allocation of materials for my project. Complete nonsense, especially when the project was not set for 6 weeks away. Because they had my deposit hostage, they had control over how much they decided they wanted to keep, it was completely arbitrary, and they kept almost $900 of my money without providing anything. If they wanted to cover their credit card transaction fees, fine, at most 6%, but the rest is absolute robbery. The only solace I can find in this loss of almost $900 now is that I did not spend another $13,000 with them. I tried to call Paul after speaking with the manager to ask if he could do me a favor and try to reason with the manager on my behalf because he seemed nice enough. No answer. No callback. I will never seek out their services again and I will actively discourage others from doing so but, based on my experience, I expect they do not care."

Eddie R on January 2023


Avatar for Green Home Solutions of North Central MA

Green Home Solutions of North Central MA

15 Coughlin Street
4.89(
9
)
Approved Pro

Green Home Solutions of North Central MA

15 Coughlin Street
4.89(
9
)
Approved Pro
Customers say: Quick response
80 local quotes requested
4 years of experience

We provide comprehensive indoor air solutions that target the root cause of the problem, not just the symptoms. Our team of experts utilizes science-backed, eco-friendly treatments to eliminate mold, mildew, and other pollutants. With years of experience and a commitment to sustainability, we've successfully transformed thousands of homes, offices, and healthcare facilities across America. Our customers trust us to deliver cleaner, healthier indoor air without harming people, pets, or the planet. Our services include: Indoor Air Quality Assessments: Identifying and addressing potential health risks. Mold Remediation: Effective removal of mold and mildew. HVAC Duct Cleaning: Improving air circulation and reducing allergens. Probiotic Treatments: Enhancing indoor air quality and promoting a healthier environment. Breathe easy with Green Home Solutions.

"Kenson was very thorough and professional, and applied lots of experience to tailor their services to our exact needs."

Anthony G on February 2025

We provide comprehensive indoor air solutions that target the root cause of the problem, not just the symptoms. Our team of experts utilizes science-backed, eco-friendly treatments to eliminate mold, mildew, and other pollutants. With years of experience and a commitment to sustainability, we've successfully transformed thousands of homes, offices, and healthcare facilities across America. Our customers trust us to deliver cleaner, healthier indoor air without harming people, pets, or the planet. Our services include: Indoor Air Quality Assessments: Identifying and addressing potential health risks. Mold Remediation: Effective removal of mold and mildew. HVAC Duct Cleaning: Improving air circulation and reducing allergens. Probiotic Treatments: Enhancing indoor air quality and promoting a healthier environment. Breathe easy with Green Home Solutions.

"Kenson was very thorough and professional, and applied lots of experience to tailor their services to our exact needs."

Anthony G on February 2025


Avatar for Dirt Dynamix LLC

Dirt Dynamix LLC

No reviews yet

Dirt Dynamix LLC

No reviews yet

We are a small dirt work and welding company based out of central New Hampshire. We are a family business, co-owned by Brother-in-Laws. We have both been in the industry for 5 years. Get in contact with us if you are looking for any of these services! - Yard expansions/ Renovations - Driveway installs - Hardscaping - Retaining walls - Drainage - Light demo - Concrete slabs - Water features - Land clearing - Metal fab & Repair work ( steel, stainless, aluminum) -Shed Moving -Container Moving

We are a small dirt work and welding company based out of central New Hampshire. We are a family business, co-owned by Brother-in-Laws. We have both been in the industry for 5 years. Get in contact with us if you are looking for any of these services! - Yard expansions/ Renovations - Driveway installs - Hardscaping - Retaining walls - Drainage - Light demo - Concrete slabs - Water features - Land clearing - Metal fab & Repair work ( steel, stainless, aluminum) -Shed Moving -Container Moving


"He did a great job painting the interior of our house. He was easy to communicate with and very responsive. He worked fast even during these last snow storms."

Kathleen B on February 2025

We specialize on interior and exterior painting services, staining, cabinet painting, and more. We guarantee your satisfaction, Check out all the services offerd below and call -or- click to schedule a free estimate today. Www.NHpaintforce.com

"He did a great job painting the interior of our house. He was easy to communicate with and very responsive. He worked fast even during these last snow storms."

Kathleen B on February 2025


Griffin Home & Grounds LLC

131 Cross Mill Rd
No reviews yet

Griffin Home & Grounds LLC

131 Cross Mill Rd
No reviews yet
23 years of experience

Servicing nearly all home and property needs. Offering free consultations, evaluations, recommendations, and estimates. Fully insured and licensed. Transferable 2-year work guarantee. From fertilization to full-service tree removal, landscape design and installation, out building design and construction, and whatever your property needs may be. From sealing your basement to flooring and finish work, custom design and installation, siding, roofing, chimney and nearly anyting your home may need interior or exterior. If you don't have the time, knowledge, tools, or physical capability to get the job done, please allow me to be your handyman. No job too big or too small.

Servicing nearly all home and property needs. Offering free consultations, evaluations, recommendations, and estimates. Fully insured and licensed. Transferable 2-year work guarantee. From fertilization to full-service tree removal, landscape design and installation, out building design and construction, and whatever your property needs may be. From sealing your basement to flooring and finish work, custom design and installation, siding, roofing, chimney and nearly anyting your home may need interior or exterior. If you don't have the time, knowledge, tools, or physical capability to get the job done, please allow me to be your handyman. No job too big or too small.



Avatar for Quality Insulation

Quality Insulation

110 Perimeter Rd
3.50(
16
)

Quality Insulation

110 Perimeter Rd
3.50(
16
)
50 years of experience

Serving the Nashua, New Hampshire area by providing fireplace installation, fireplace mantel installation, garage door installation, gutter installation, gutter protection services, insulation installation, shower enclosure installation, bathroom hardware installation, shelving storage systems installation and waterproofing. Local Relationships. National Resources. Call us today! Or email us at [email protected].

"This company may not be for you. After they blow in insulation the holes they made, in my case, were not adequately filled and then mudded over. Now my painting contractor wants a fortune for a drywall company to come over and re-do the job so it can be painted without the big sunken, underfilled holes showing through. Be sure you specify what you expect so that when you paint it will look as you'd want your home's ceiling to look."

Scott M on June 2024

Serving the Nashua, New Hampshire area by providing fireplace installation, fireplace mantel installation, garage door installation, gutter installation, gutter protection services, insulation installation, shower enclosure installation, bathroom hardware installation, shelving storage systems installation and waterproofing. Local Relationships. National Resources. Call us today! Or email us at [email protected].

"This company may not be for you. After they blow in insulation the holes they made, in my case, were not adequately filled and then mudded over. Now my painting contractor wants a fortune for a drywall company to come over and re-do the job so it can be painted without the big sunken, underfilled holes showing through. Be sure you specify what you expect so that when you paint it will look as you'd want your home's ceiling to look."

Scott M on June 2024

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Basement Waterproofing questions, answered by experts

In many cases, yes, a damp basement can be bad for your health. Not only can damp air affect your lungs, but it can promote mold growth and pest infestation. Mold spores can be dangerous to breathe in, as can waste particles from insects and rodents attracted to the moisture. Damp, moldy air can also move up into your living area. As such, it’s crucial to fix any basement moisture problems as soon as they crop up.

Crawl space encapsulation can make repairs more complicated, particularly if you have plumbing or wiring surrounding your crawl space area. Additionally, some home designs benefit from the additional airflow that crawl spaces with vents provide. Vents are no longer an option after encapsulation. Always talk to your crawl space contractor to ensure the pros outweigh the cons before investing in the installation.

Most people consider a French drain to be one of the most effective solutions for foundation leaks, but it’s not always a standalone solution. French drains will help keep water away from your foundation to reduce the risk of leaking and structural damage from soil expansion, but depending on your foundation type and location, you might need other systems or techniques—like soil gradation and gutter and leader installation—to resolve the underlying problem.

The difficulty of adding a basement to an existing house can vary depending on the house’s location, the size of the basement, and the type and condition of the existing foundation. Adding a basement is a job best handled by the pros, so you’ll need to enlist professional help for this project.

The first step to preventing foundation cracks is to repair any current ones. When one crack forms, it becomes more likely that a second crack will follow. A few other tips include performing regular foundation checks, cleaning spouts and gutters, and installing exterior drains if needed. For those living in a hot and arid area, you should water your foundation every other day.

The Alton Bay, NH homeowners’ guide to basement waterproofing services

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