Top-rated basement waterproofing pros.

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There are 11 highly-rated local basement waterproofing pros.

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    Average homeowner rating
  • Verified reviews icon152
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Bryn Mawr

Avatar for AJ Waterproofing

AJ Waterproofing

4.85(
199
)
Approved Pro

AJ Waterproofing

4.85(
199
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
1976 years of experience

We are a family run waterproofing specialist company, owned and operated, since 1976 by A.J. DiElsi. We have one crew, one truck and start and finish one job at a time. We are completely insured with general liability and workman's compensation. There is no charge for estimates and we take no deposits on any job. You pay us upon completion of the job. We do not have salesmen. A.J. is the gentleman that comes out to deliver each estimate and he is on each job. We excel in impeccable workmanship, and the jobs are always left cleaner than when we arrived. We give a lifetime guarantee on our French Drains and it is transferable to each new homeowner. Please feel free to call with any questions 610-527-9444 or 610-409-0888, Additional phones: 610-960-1589. Or feel free to email us at : [email protected], you can also check us out on YouTube and our website, ajwaterproofing.com.

"QUICK, FRIENDLY, and CHEAP!! First, AJ called me within 30 seconds of me texting him asking for an estimate. I sent him a photo of our water leak issue and he immediately responded. He actually explained that we could probably handle the repair ourselves if we were up for it, instead of paying him or someone else. He then walked us through every step in detail and made sure we were comfortable with the directions. So in the end, it cost us $0 in labor and only a small amount for materials, and really demonstrated AJ's integrity and generosity!"

Jarcy M on September 2023

We are a family run waterproofing specialist company, owned and operated, since 1976 by A.J. DiElsi. We have one crew, one truck and start and finish one job at a time. We are completely insured with general liability and workman's compensation. There is no charge for estimates and we take no deposits on any job. You pay us upon completion of the job. We do not have salesmen. A.J. is the gentleman that comes out to deliver each estimate and he is on each job. We excel in impeccable workmanship, and the jobs are always left cleaner than when we arrived. We give a lifetime guarantee on our French Drains and it is transferable to each new homeowner. Please feel free to call with any questions 610-527-9444 or 610-409-0888, Additional phones: 610-960-1589. Or feel free to email us at : [email protected], you can also check us out on YouTube and our website, ajwaterproofing.com.

"QUICK, FRIENDLY, and CHEAP!! First, AJ called me within 30 seconds of me texting him asking for an estimate. I sent him a photo of our water leak issue and he immediately responded. He actually explained that we could probably handle the repair ourselves if we were up for it, instead of paying him or someone else. He then walked us through every step in detail and made sure we were comfortable with the directions. So in the end, it cost us $0 in labor and only a small amount for materials, and really demonstrated AJ's integrity and generosity!"

Jarcy M on September 2023


Avatar for Basement Gurus, LLC

Basement Gurus, LLC

4.84(
151
)
Approved Pro

Basement Gurus, LLC

4.84(
151
)
Approved Pro
Customers say: Quality work
2010 years of experience
Free onsite estimate

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025


Avatar for J & A Environmental Services

J & A Environmental Services

5.00(
40
)
Approved Pro

J & A Environmental Services

5.00(
40
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2019 years of experience

Our mission at J & A Environmental Services, LLC is to continue the growth of our business by doing right by all of our clients. We truly care about your health and environment, so we take our jobs very seriously. We offer Mold Remediation, Air Quality Testing, Basement Waterproofing, Odor Removal, and Water Damage Clean-up. J&A Environmental Services, LLC is a fair honest company with excellent customer service. J&A Environmental Services, LLC built the brand by helping one family at a time to eliminate the mold in their environment. Call us 24/7 for all your Environmental needs. We have 100+ five star ratings on Angi's Leads and 34 five star ratings on Angi's Ads.

"Came out for a free estimate and gave a great price to fix my damage and ensure problem areas were fixed for the future. They were able to take care of everything in one day. Set up plenty of barriers to prevent mold spread and keep the rest of the house clean."

Matthew G on September 2025

Our mission at J & A Environmental Services, LLC is to continue the growth of our business by doing right by all of our clients. We truly care about your health and environment, so we take our jobs very seriously. We offer Mold Remediation, Air Quality Testing, Basement Waterproofing, Odor Removal, and Water Damage Clean-up. J&A Environmental Services, LLC is a fair honest company with excellent customer service. J&A Environmental Services, LLC built the brand by helping one family at a time to eliminate the mold in their environment. Call us 24/7 for all your Environmental needs. We have 100+ five star ratings on Angi's Leads and 34 five star ratings on Angi's Ads.

"Came out for a free estimate and gave a great price to fix my damage and ensure problem areas were fixed for the future. They were able to take care of everything in one day. Set up plenty of barriers to prevent mold spread and keep the rest of the house clean."

Matthew G on September 2025


Avatar for Aqua Dry

Aqua Dry

4.88(
58
)
Approved Pro

Aqua Dry

4.88(
58
)
Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
1995 years of experience

Aqua Dry specializes in Basement and Crawlspace Waterproofing Science and are Foundation Repair Experts: We realize damp, wet, smelly basements can be very frustrating. That's why we offer a 21-point inspection to determine the cause of the water intrusion and mold growth. Aqua-Dry has achieved the highest accolades for its proactive technology, hands-on craftsmanship, and superior mold solution practices. Go from Wet to dry in 2 days or less. Our motto is to affordably solve your water intrusion concerns, in addition to, designing the best defense to combat against all Microbial growth and Mycotoxins. Finally, there is "One Local Waterproofing Expert" who cares about your home and your family's health. As we continue to provide the most effective methods for achieving a healthy proactive Basement environment - we invite you to take advantage of our one time free estimate / inspection offer and the most competitive financing options.

"Aqua-Dry is best for basement waterproofing and sump installations."

Mayur D on June 2024

Aqua Dry specializes in Basement and Crawlspace Waterproofing Science and are Foundation Repair Experts: We realize damp, wet, smelly basements can be very frustrating. That's why we offer a 21-point inspection to determine the cause of the water intrusion and mold growth. Aqua-Dry has achieved the highest accolades for its proactive technology, hands-on craftsmanship, and superior mold solution practices. Go from Wet to dry in 2 days or less. Our motto is to affordably solve your water intrusion concerns, in addition to, designing the best defense to combat against all Microbial growth and Mycotoxins. Finally, there is "One Local Waterproofing Expert" who cares about your home and your family's health. As we continue to provide the most effective methods for achieving a healthy proactive Basement environment - we invite you to take advantage of our one time free estimate / inspection offer and the most competitive financing options.

"Aqua-Dry is best for basement waterproofing and sump installations."

Mayur D on June 2024


Avatar for Waterproofing One

Waterproofing One

4.82(
132
)
Approved Pro

Waterproofing One

4.82(
132
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
1999 years of experience

Family owned. Over thirty years in business. Free estimates, all work guaranteed. Waterproofing One, now proudly serving central and south New Jersey, provides basement waterproofing, foundation repair, and mold remediation to the Greater Philadelphia, PA, area, including Montgomery, Chester and Delaware counties. If you are concerned about maintaining the value of your property, then saving your foundation from the results of water damage is a must. Basement leaks can lead to a cracked foundation and the growth of unhealthy mold. Not only do we guarantee to have low prices, but all of our work is warranted. We are licensed, insured and certified for your protection, and accredited by the BBB. Call Waterproofing One today to schedule your free estimate! We are currently licensed for the Delaware and New Jersey area, please see below licensing information. Delaware Licensing Number- 17-92051-13-000 New Jersey Licensing Number-13vh09291700

"From the first contact they were very responsive, friendly, and professional. They came right in on the estimate price and got the job done quickly with top quality work. I will definitely hire them again in the future."

Michael M on March 2021

Family owned. Over thirty years in business. Free estimates, all work guaranteed. Waterproofing One, now proudly serving central and south New Jersey, provides basement waterproofing, foundation repair, and mold remediation to the Greater Philadelphia, PA, area, including Montgomery, Chester and Delaware counties. If you are concerned about maintaining the value of your property, then saving your foundation from the results of water damage is a must. Basement leaks can lead to a cracked foundation and the growth of unhealthy mold. Not only do we guarantee to have low prices, but all of our work is warranted. We are licensed, insured and certified for your protection, and accredited by the BBB. Call Waterproofing One today to schedule your free estimate! We are currently licensed for the Delaware and New Jersey area, please see below licensing information. Delaware Licensing Number- 17-92051-13-000 New Jersey Licensing Number-13vh09291700

"From the first contact they were very responsive, friendly, and professional. They came right in on the estimate price and got the job done quickly with top quality work. I will definitely hire them again in the future."

Michael M on March 2021


Avatar for A Waterproofing Solutions, Inc.

A Waterproofing Solutions, Inc.

4.79(
42
)
Approved Pro

A Waterproofing Solutions, Inc.

4.79(
42
)
Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2020 years of experience

We offer over 30 years of industry experience and will provide you with an unmatched level of experience and commitment to waterproofing and mold remediation projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building long-term relationships with our clients and guarantee your satisfaction! References are available upon request. Give us a call today, and let's get started.

"Quick response, excellent execution."

Curtis V on September 2024

We offer over 30 years of industry experience and will provide you with an unmatched level of experience and commitment to waterproofing and mold remediation projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building long-term relationships with our clients and guarantee your satisfaction! References are available upon request. Give us a call today, and let's get started.

"Quick response, excellent execution."

Curtis V on September 2024


Avatar for Groundworks

Groundworks

4.54(
328
)
Approved Pro

Groundworks

4.54(
328
)
Approved Pro
Customers say: Super punctual
1997 years of experience
Free onsite estimate

Established in 1997, Groundworks is a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across Philadelphia & New Jersey, we bring our local expertise closer to you. Groundworks proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! PA158514 (PA)

"Tyrell did an excellent job correcting the mistakeS of the people who installed my basement waterproofing equipment. There was a terrible rotten egg smell and that's gone now. Tyrell cleaned up after himself, if any water spilled he made sure to vacuum it up and to dispose of everything in the proper place."

Alexander M on September 2023

Established in 1997, Groundworks is a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across Philadelphia & New Jersey, we bring our local expertise closer to you. Groundworks proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At Groundworks, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! PA158514 (PA)

"Tyrell did an excellent job correcting the mistakeS of the people who installed my basement waterproofing equipment. There was a terrible rotten egg smell and that's gone now. Tyrell cleaned up after himself, if any water spilled he made sure to vacuum it up and to dispose of everything in the proper place."

Alexander M on September 2023


Avatar for Dry Tech Waterproofing Solutions

Dry Tech Waterproofing Solutions

4.73(
218
)
Approved Pro

Dry Tech Waterproofing Solutions

4.73(
218
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
2010 years of experience

Our company was built on the foundation of trust, friendship and years of experience. We strive to maintain those same principles in all that we do. Whether it’s a damp basement, foundation issue or an unhealthy, moldy environment; we are here to help. We promise to lessen the stress of your basement or crawlspace troubles with our comprehensive water management, mold remediation and foundation repair solutions. We take great pride in our ability to transform your needs and expectations into a customized solution. With our quality workmanship being guaranteed, you’ll have one less thing to worry about. Call today for your free estimate!

"They did it right & quickly. However, the price quoted to me was no where near the final price. They said they installed a secondary pump which added $1450 more! I don't see how a 2nd pump cost more than the primary one. Don't like getting bids over the phone without seeing what needs to be done."

Fred D on November 2025

Our company was built on the foundation of trust, friendship and years of experience. We strive to maintain those same principles in all that we do. Whether it’s a damp basement, foundation issue or an unhealthy, moldy environment; we are here to help. We promise to lessen the stress of your basement or crawlspace troubles with our comprehensive water management, mold remediation and foundation repair solutions. We take great pride in our ability to transform your needs and expectations into a customized solution. With our quality workmanship being guaranteed, you’ll have one less thing to worry about. Call today for your free estimate!

"They did it right & quickly. However, the price quoted to me was no where near the final price. They said they installed a secondary pump which added $1450 more! I don't see how a 2nd pump cost more than the primary one. Don't like getting bids over the phone without seeing what needs to be done."

Fred D on November 2025


Avatar for Quality 1st Basement Systems

Quality 1st Basement Systems

4.58(
253
)
Approved Pro

Quality 1st Basement Systems

4.58(
253
)
Approved Pro
Customers say: Super punctual
1986 years of experience
Free onsite estimate

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023

Quality 1st Basement Systems has been helping homeowners improve their homes for over 20 years. We have currently helped over 6,000 homeowners with All Things Basementy by designing effective solutions for their home’s needs. Whether our homeowners are interested in waterproofing a wet basement, fixing cracked foundation walls, insulating their crawl spaces, finishing their basements with mold-resistant materials, and raising concrete slabs, we can help! We’re currently the largest waterproofing company serving both residential and commercial clients in the tri-state area and are continuing to grow. As a member of the internationally renowned Basement Systems, Inc. network and Foundation Supportworks, Inc. network, we have global resources, but provide local service! The Basement Systems network thoroughly trains our employees at the Basement Systems, Inc. corporate headquarters in CT. Our hard work and dedication to our customers have earned us an A+ rating with the Better Business Bureau and several Super Service Awards from Angie’s List. We service most of New Jersey, all 5 boroughs of New York City and certain parts of Pennsylvania. Thousands of homeowners have experienced the Quality 1st Basement Systems difference. We invite you to do your homework and check out our credentials and compare. Put our experience and integrity to work protecting your investment. Our reputation exceeds all others because of our culture of WOW customer service.

"Everything went smoothly"

Hector R on December 2023


Avatar for Dry Tech Waterproofing Solutions

Dry Tech Waterproofing Solutions

4.79(
28
)
Approved Pro

Dry Tech Waterproofing Solutions

4.79(
28
)
Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
2007 years of experience

Our company was built on the foundation of trust, friendship and years of experience. We strive to maintain those same principles in all that we do. Whether it’s a damp basement, foundation issue or an unhealthy, moldy environment; we are here to help. We promise to lessen the stress of your basement or crawlspace troubles with our comprehensive water management, mold remediation and foundation repair solutions. We take great pride in our ability to transform your needs and expectations into a customized solution. With our quality workmanship being guaranteed, you’ll have one less thing to worry about. Call today for your free estimate!

"Great! Not going to lie, they are expensive. But they were quick, professional, and efficient. Completed the repairs and clean-up immaculately. Great job!"

Edward B on May 2023

Our company was built on the foundation of trust, friendship and years of experience. We strive to maintain those same principles in all that we do. Whether it’s a damp basement, foundation issue or an unhealthy, moldy environment; we are here to help. We promise to lessen the stress of your basement or crawlspace troubles with our comprehensive water management, mold remediation and foundation repair solutions. We take great pride in our ability to transform your needs and expectations into a customized solution. With our quality workmanship being guaranteed, you’ll have one less thing to worry about. Call today for your free estimate!

"Great! Not going to lie, they are expensive. But they were quick, professional, and efficient. Completed the repairs and clean-up immaculately. Great job!"

Edward B on May 2023

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Showing 1-10 of 498
Basement Waterproofing questions, answered by experts

You’ll need to reseal the foundation every five to 10 years, depending on the sealant you’ve used, the moisture conditions present in and around your home, and the condition of your foundation. Having a foundation inspection conducted before reapplication can help you catch any problems before you begin resealing. Of course, if you notice any new leaks or other moisture problems at any time, it may be necessary to reseal the foundation sooner.

Waterproofing or encapsulating protects against moisture, preventing mold growth and structural damage. These services also enhance energy efficiency and improve air quality by keeping humidity levels in check.

Physically, the most challenging part of finishing a basement is installing egress windows or doors when the space is below ground level. Mentally, the hardest part may be envisioning the project and planning around load-bearing and mechanical obstacles.

Ideal humidity conditions generally range from 30% to 50%, with 45% considered optimal humidity for most homes. If your humidity levels drop below that range, you can turn your dehumidifier off. Additionally, suppose the temperature where the dehumidifier is installed falls below 60 degrees Fahrenheit. In that case, it's best to turn it off and unplug it since cooler temperatures can cause the unit's coils to freeze.

Mold can grow anywhere in your home where there’s moisture that doesn’t dry out, usually in areas that are either not ventilated properly or where moisture gathers continuously. Insulation, drywall, and foundations typically provide mold with areas to grow if moisture is present and does not have a chance to dry out. Some of the most common areas in a home for mold growth include:

  • Attic

  • Walls

  • Bathroom

  • Crawlspace

  • Basement

The Bryn Mawr, PA homeowners’ guide to basement waterproofing services

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

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