Best basement waterproofing pros near Longboat Key, FL

Q: Are there downsides to waterproofing the basement?

• <div><p>Some basement waterproofing methods can actually cause your water or moisture problems to get worse, which is why it&rsquo;s so important to call in a professional who knows how to solve your underlying issue and use the appropriate waterproofing methods. An example of this would be applying latex waterproofing paint to the insides of your basement walls without fixing the water issue outside. Doing so can trap moisture in the basement walls, which can promote mold growth, peeling paint, and even damaged concrete. However, when done by a professional, the only downside to basement waterproofing is the up-front cost. </p></div>

Q: Is it better to waterproof a basement from the inside or outside?

• <div><p>Whether to waterproof your basement from the interior or exterior depends on several factors, including your budget.</p><p>Exterior waterproofing is generally considered the superior method because it stops water at the source, preventing it from seeping into and damaging your basement walls. This approach offers the most protection, making it ideal if you use your basement for storage.</p><p>By contrast, interior waterproofing is often less expensive and requires less labor because the area is more accessible.</p><p>For maximum protection against water leakage and moisture, applying waterproofing measures to both the inside and outside is the best solution. However, if you must choose only one, stopping water from the outside is the most effective approach to preserve your foundation and prevent damage.</p></div>

Q: Can underfloor insulation cause moisture and mold?

• <div><p>Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and&mdash;if your floors are wood&mdash;rotting.</p></div>

Q: How long does it take for water to cause structural damage?

• <div><p>Water can seep into porous materials like wood beams, floor joists, and roof rafters within minutes, but they&rsquo;ll need to see prolonged exposure before you have structural damage. Mold can start growing within 24 hours, and mold can eat away at the structural components over time. Wood rot is more of a concern, though. Wet and dry rot are fungal infections that set in in moist conditions and rapidly deteriorate wood, causing major structural damage within just a few months in some cases.</p></div>

Q: Should I close my crawl space vents in winter?

• <div><p>In most climates, contractors recommend closing your crawl space vents in winter. Keeping them shut protects your crawl space from freezing temperatures, pests, and cool breezes that can lead to chilly floors in your home. However, it's often best to speak with a local crawl space team about your specific design and its relationship to the winter season.</p></div>

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Verified Reviews for Basement Waterproofing pros in Longboat Key, FL

*The Angi rating for Basement Waterproofing companies in Longboat Key, FL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Longboat Key, FL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on July 15, 2024

Reviewed in July 2024
Dave Brown and his son came out and gave us a fair estimate for waterproofing part of our basement for water in the pump and watersoftener area. Upon further investigation while having the water tank and softner system moved, realized we had a leak coming in from behind the tank due to a...
Stay Dry Basement Waterproofing, Inc.
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Reviewed in May 2024
Manasota Builders Juan Guzman I give Manasota Builders and the owner Mr. Guzman a top score of excellent. Read further if interested in the magnitude of the rated project and the variety of skills it required. The project required the correction of severe rainwater intrusion through a 2nd...
Manasota Builders Inc.
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Reviewed in October 2023
Northern Epoxy was a very good choice for putting in beautiful and colorful floors in our garage and basement. People in our condo community have admired the job and no one said a negative comment. The benefit of this upgrade is well worth the cost. The employees were always on time, and...
Northern Epoxy Pros LLC
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Reviewed in February 2022
Excellent work, very professional and timely. We hired them to replace a subfloor and waterproof vinyl flooring in a mobile home. The results were even better than expected. In addition, they were able to do the job in a very timely manner. Their response time was better than many contractors I...
MFI Flooring Installation
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Reviewed in September 2021
The men working on basement did so in record time. They arrived when they said they would and kept us informed of progress. We would like to thank foremen Darren Sharp, Robet Robley, and Dylan Asbury for there expert help.
Foundation Recovery Systems
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Reviewed in January 2021
I had them do some work on my basement project. Their sub-contractors were excellent and that work is great. The plumbing, electrical, and tiling have been excellent. However, the coordination and communication were poor and they had an attitude. The drywall work is not well done. Their...
SKLS Group L.L.C.
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Reviewed in September 2020
We purchased this house in 2015 and had our basement waterproofed in 2016. We have since refinished our basement with peace of mind we will have no water damage in our basement. It was money well spent. We would recommend Ohio State Waterproofing to anyone wanting worry free and dry basements.
Ohio State Home Services, Inc.
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Reviewed in January 2016
Despite restrictions by our property mgr., Perfection submitted all required documentation and showed up on time on the date specified. They removed the polypebble surface from our small deck, and, weather permitting, will return to apply waterproofing stain. They cleaned up my downstairs...
Perfection Pressure Washing
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Reviewed in February 2014
We have had water issues in our basement for over 12 years. We have had cracks filled, drain tile, back-up sump pumps etc. Fernando was the first contractor who actually figured out our water problem and could explain it to us. We felt so lucky to find him. He is punctual, reliable,...
A-Proseal Water Proofing
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Reviewed in August 2010
Working with Charlie was a great experience. He provided an alternative to one of the other floor dealers and saved me a lot of money. His workers were pleasant and helpful. They moved my washing machine and dryer and reattached it. The flooring is beautiful and made a big difference in the the...
Bella Casa Floor & Home Fashions, LLC
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Top-Rated Basement waterproofing pros in Longboat Key - Updated Nov 2026

Advanced Environmental Services- Florida

4.6(

245

)

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Our experience with this company has been great! We have used their services in the past and was very, very pleased with the work they did for us. Because we were so satisfied with their services, we reached out to them once again to take care of our exterior waterproofing and termite problem. As always, their professionalism is above par. They solved our issues in a timely, thorough and affordable manner. I highly recommend their services to others."

Response time7 hrs

Response rate100%

17 neighbors recently requested a quote

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quick response

"Dedicated Professionals and made sure our leak was taken care of."

Response time1 day

2 neighbors recently requested a quote

Recommended by93%of homeowners

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2002

Free estimates

Warranties offered

"I had multiple tunnels made by an armadillo under my house concrete slab that went as far as 22 feet. I needed these to be pressure filled before having a new concrete patio poured. They were able to get the job scheduled quickly and completed on time. Blake and Coop (may be spelled wrong) did a professional job. I would highly recommend this company to anyone in need of foundation repair work."

+10

Response time1 day

108 neighbors recently requested a quote

Recommended by81%of homeowners

Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Longboat Key, FL and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Highly recommend the company and Freddie the plumber. I had a big problem and he did a very good job."

3 neighbors recently requested a quote

Recommended by90%of homeowners

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JW Solutions LLC

New to Angi

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

Approved

Hi, I’m Jay White. I’ve proudly lived in Charlotte County for 45 years. I’m a perfectionist who takes pride in doing things right the first time. I believe in honest work, clear communication, and delivering results my customers can feel confident about.

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BULLFROG MOLD AND WATERPROOFING LLC

5.0(

)

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

In business since 2025

Free estimates

Emergency services offered

"Our neighbor's yard slopes down towards our house. So water kept gathering around our foundation and leaking through after rain storms. This caused mold problems inside. Bullfrog waterproofed the foundation and installed a French drain system with catch basin drains to help move water away from this area of our yard. They also handled the mold and water restoration work on the inside at the same time. Thanks again for taking care of everything for us at a difficult time."

+29

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Advanced Environmental Services - Gulf Coast

4.5(

241

)

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Longboat Key, FL and surrounding areas

In business since 2015

Free estimates

Emergency services offered

"Had a great experience with this company! Estimate and scope of work was clear, the price was fair, and Bryce and Jose went above and beyond to reroute my dryer vent inside of an interior wall and away from the waterproofing area! Definitely would recommend"

Response time3 hrs

Response rate100%

Recommended by96%of homeowners

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The Surfin’ Plumbers, Heating & Cooling (FL)

4.5(

994

)

Basement Drainage Channels - Install

Serving Longboat Key, FL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Tim arrived, was very friendly, performed services rapidly. He informed me of the poor quality of the new water & recommended (with no pressure) a water filter or softener to correct the problem. Tim was outstanding!"

Recommended by89%of homeowners

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CULTIV8 LANDSCAPE SERVICES

4.7(

242

)

Basement Drainage Channels - Install

Serving Longboat Key, FL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Great job as usual. A big yard to be mulched - efficient, on time, and cost effective. Highly recommended!"

+154

Recommended by94%of homeowners

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Atlantis Water Services, Inc.

4.5(

)

Basement Drainage Channels - Install

Serving Longboat Key, FL and surrounding areas

In business since 1946

Free estimates

Emergency services offered

"Every time it rains our side lot floods. We hired them to install a drainage system. The were quick and the price was right."

Recommended by95%of homeowners

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Showing 1-10 of 40

Basement Waterproofing FAQs, answered by experts

Some basement waterproofing methods can actually cause your water or moisture problems to get worse, which is why it’s so important to call in a professional who knows how to solve your underlying issue and use the appropriate waterproofing methods. An example of this would be applying latex waterproofing paint to the insides of your basement walls without fixing the water issue outside. Doing so can trap moisture in the basement walls, which can promote mold growth, peeling paint, and even damaged concrete. However, when done by a professional, the only downside to basement waterproofing is the up-front cost.

Whether to waterproof your basement from the interior or exterior depends on several factors, including your budget.

Exterior waterproofing is generally considered the superior method because it stops water at the source, preventing it from seeping into and damaging your basement walls. This approach offers the most protection, making it ideal if you use your basement for storage.

By contrast, interior waterproofing is often less expensive and requires less labor because the area is more accessible.

For maximum protection against water leakage and moisture, applying waterproofing measures to both the inside and outside is the best solution. However, if you must choose only one, stopping water from the outside is the most effective approach to preserve your foundation and prevent damage.

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

Water can seep into porous materials like wood beams, floor joists, and roof rafters within minutes, but they’ll need to see prolonged exposure before you have structural damage. Mold can start growing within 24 hours, and mold can eat away at the structural components over time. Wood rot is more of a concern, though. Wet and dry rot are fungal infections that set in in moist conditions and rapidly deteriorate wood, causing major structural damage within just a few months in some cases.

In most climates, contractors recommend closing your crawl space vents in winter. Keeping them shut protects your crawl space from freezing temperatures, pests, and cool breezes that can lead to chilly floors in your home. However, it's often best to speak with a local crawl space team about your specific design and its relationship to the winter season.

The Longboat Key, FL homeowners’ guide to basement waterproofing services

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

See all articles

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How to Keep Your Basement Dry and Get Rid of Moisture
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