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Best basement waterproofing pros near Key Largo, FL

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Top-Rated Basement waterproofing pros in Key Largo - Updated Nov 2026

Avatar for Groundworks
Groundworks
5.0(
73
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Key Largo, FL and surrounding areas

Approved (Corporate)

In business since 2002

Free estimates

Warranties offered

"Javiâ s Zack and Jon were extremely professional efficient and answer all my questions, they worked hard and got the job finished very quickly Iâ m overall very satisfied with the experience 10 out 10 would recommend this to anyone who has a crawl space that was not easy to enter and stayed wet !! I no longer have that problem !"
Foundation
Foundation
Foundation
Foundation
Foundation

+13

98 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for GGR quality construction llc
GGR quality construction llc
5.0(
14
)
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Key Largo, FL and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I would like to express my most sincere gratitude to this company for the excellent work they performed in replacing the bathroom in my home. From the very first moment, they proved themselves to be highly responsible, punctual, and professional. The quality of their work exceeded my expectations; they paid attention to every detail, and the final result turned out beautifully. Their dedication and commitment to what they do are truly evident. Without a doubt, I recommend them 100%. It is difficult to find people who are this reliable and committed nowadays. Thank you so much for doing such an impeccable job. If you like, my dear, I can personalize this with the name of the company or the person who did the work for you, to make it even more special."
32 neighbors recently requested a quote
Barrett's Plumbing & Septic LLC
5.0(
26
)
Basement Drainage Channels - Install

Serving Key Largo, FL and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"Barrett's Plumbing saved me a ton of headaches and money. Every 2-3 weeks I used to have to call someone to pump or clear my drain, ranging anywhere from $250-$300. Barrett's Plumbing was the only one to actually realize that I needed a whole new septic tank. Finally I no longer have to worry about any backups or flooding in my house."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+26

Recommended by96%of homeowners
Avatar for A&S Paving LLC
A&S Paving LLC
4.3(
75
)
Basement Drainage Channels - Install

Serving Key Largo, FL and surrounding areas

In business since 2012

Free estimates

Emergency services offered

"Work was done ok however, on follow up when I wanted lines drawn in parking area, no one responded to multiple calls. As a client, even IF they were not available to do this part of the job, I deserved a return call. Had there been a problem, I’m concerned that they would not have responded to that either. Poor communication is the reason for low ratings"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+22

Recommended by83%of homeowners
AAA Waterproof and Painting, Corp.
4.0(
1
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Key Largo, FL and surrounding areas

In business since 2019

Free estimates

Credit card accepted

We're dedicated to providing our clients with the very best in concrete installation and repair for driveways, excavation and waterproofing and a variety of other projects. With over 3 years of industry experience, we take and enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

Response time50 mins
Recommended by100%of homeowners
Showing 1-10 of 17
Basement Waterproofing FAQs, answered by experts

Topical sealers adhere to the surface of concrete to create a protective layer. In many cases, this is all you need for concrete that sees light to moderate traffic, such as your basement. Penetrating sealers, on the other hand, bond with the free lime in the top layer of concrete to form calcium silicate, which prevents liquid from passing through. This type of sealer protects the surface from water, oil, and gasoline spills.

You can seal a concrete slab by cleaning the surface, filling in any cracks, etching the surface, applying a sealer, and letting it dry. Concrete slabs don't typically need sealing, but you can use a topical concrete sealer if you notice signs of water damage. If you haven't already fixed the cause of the leak, then you'll want to repair the plumbing before you seal a concrete slab.

Yes, if your crawl space is prone to humidity, a dehumidifier can help keep it dry. For use in a crawl space, you’ll need a high-capacity and high-efficiency dehumidifier with built-in air filtration. It’s also wise to purchase one with a self-draining feature. Otherwise, you’ll need to climb into the crawl space to empty the dehumidifier.

If you set up a dehumidifier, it will usually dry out your wet crawl space within 12 to 24 hours. Once the space is dry, it’s a good idea to take preventative measures to keep it dry. These include installing a French drain or other exterior foundation drainage system, installing a sump pump in the crawl space, and installing a vapor barrier in addition to leaving the dehumidifier running.

Yes, usually you will need some kind of vapor barrier on the exterior walls when the framing is attached to concrete and masonry surfaces.

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

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