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Top-Rated Basement waterproofing pros in Griswold - Updated Nov 2026

Avatar for Groundworks
Groundworks
5.0(
66
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Griswold, IA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"Groundworksâ listened to our input and throughly evaluated the requirements to support the basement walls and prevent water from coming in. They were on time and communicated clearly and timely. The Foreman did an evaluation and recommended a couple changes to the plan that I agreed with and weâ re beneficial. The 3 workers knew what they were doing and worked hard. I appreciate the manner they communicated and they were very friendly. Overall, they did a great job!"
Protect Your Basement
Correct Your Wet Basement
Protect Your Basement
Waterproof Your Basement
Protect Your Concrete Before & After

+16

202 neighbors recently requested a quote
Recommended by72%of homeowners
Dave Navarro Construction
5.0(
2
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Griswold, IA and surrounding areas

In business since 2010

Free estimates

We are a General contracting company. We perform all services involved in the completion of unfinished space. We do hire sub contractors when needed. We also stand by their work as well. Though we have only been in buisness for a short time. we have a combined 37 years construction experience.

Recommended by100%of homeowners
Avatar for Midwest Basements, LLC
Midwest Basements, LLC
4.0(
4
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Griswold, IA and surrounding areas

In business since 2005

Free estimates

Emergency services offered

Midwest Basements LLC should be your first choice when it comes to any of your foundation needs. We take the same pride in our work as you do in your own home. Please call and ask about our in house financing and our emergency response service. Thank You!

Crawl Space
Ramp & Door
Digging out
Recommended by100%of homeowners
Avatar for Pro Site Company
Pro Site Company
New to Angi
Basement Drainage Channels - Install

Serving Griswold, IA and surrounding areas

Emergency services offered

Concrete performance depends on planning, from subgrade prep to finish and cure. An excavating company in Glenwood , will compact the base, set forms, and confirm reinforcement placement before the first truck arrives. In cooler mornings typical of Glenwood, IA, crews may adjust mix timing and finishing sequence to avoid surface tearing. Control joints are laid out to manage cracking, and edges are tiled where traffic or freeze-thaw cycles are common. Pro Site Company coordinates with excavation and grading teams to align pads, sidewalks, and approaches with site elevations and shed water. Where runoff is a concern, drains or drainage tubes are set before the pour, and slopes are checked with levels to maintain flow. For farm or outbuilding slabs in Mills County, we may recommend thicker edges, fiber reinforcement, or a vapor barrier based on intended loads.

Concrete Pouring
Land Grading
Basement Waterproofing FAQs, 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.

The best basement waterproofing method depends on the specific issue causing the water intrusion. For minor problems, simple solutions like installing a properly functioning gutter system to direct runoff away and grading the soil to slope away from your foundation can be effective.

If you have more significant water problems, the solution will need to be more robust:

  • For standing water on the basement floor, a floor drain or a sump pump system may be the best solution.

  • For water pooling around the foundation, installing an exterior French drain can intercept water before it reaches the basement walls.

Other effective waterproofing methods, which can be used depending on your home's specific needs, climate, and soil type, include sealing the interior walls, landscape alteration, installing interior drainage systems, and using a dehumidification system to control moisture levels.

The best type of basement ventilation system depends on your budget, the moisture in your basement’s air, and the types of windows you have down there. You should consider all of these factors when choosing a ventilation system. However, the most effective method for basement ventilation is an energy recovery ventilator (ERV) or a whole-house ventilation system, which preheats or precools incoming air from the outside while also managing water vapor.

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation. 

A vapor barrier keeps moisture out of the crawl space, while insulation reduces the amount of unconditioned air—and sometimes moisture—that enters the space. Coupling a vapor barrier with insulation can help prevent humidity and related moisture damage in a crawl space while also making your home more energy-efficient. Just be sure to use insulation that won’t get damaged from moisture, like rigid foam board or expanding spray foam insulation.

The Griswold, IA homeowners’ guide to basement waterproofing services

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