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Verified Reviews for Basement Waterproofing pros in Onamia, MN

*The Angi rating for Basement Waterproofing companies in Onamia, MN 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 Onamia, MN 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 October 27, 2025

Find Basement waterproofing pros in Onamia

Avatar for Groundworks

Groundworks

1325 S Frandsen Ave
4.89(
44
)
•Approved Pro

Groundworks

1325 S Frandsen Ave
4.89(
44
)
•Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
24 local quotes requested

Groundworks, formerly Innovative Basement Authority, is renowned for delivering unparalleled solutions since 2005. 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 the state of Minnesota & part of North Dakota, 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! BC765730 (MN)

"Very friendly crew, very efficient and helpful in explaining what they were doing."

Allen J on August 2025

Groundworks, formerly Innovative Basement Authority, is renowned for delivering unparalleled solutions since 2005. 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 the state of Minnesota & part of North Dakota, 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! BC765730 (MN)

"Very friendly crew, very efficient and helpful in explaining what they were doing."

Allen J on August 2025

Platinum Landscape and Spa Sales

2178 Quebecor Road Northeast
No reviews yet

Platinum Landscape and Spa Sales

2178 Quebecor Road Northeast
No reviews yet
12 years of experience

Platinum is a full service Landscape Construction Company. We specialize in landscape tear-outs, rock and edging installation, shoreline restoration, water features/ponds or pondless/koi pond installation, retaining wall installation, paver patios, concrete patios/sidewalks/driveways/colored concrete, waterproofing structures, berm installation, grading yards, sod installation and yard restoration

Platinum is a full service Landscape Construction Company. We specialize in landscape tear-outs, rock and edging installation, shoreline restoration, water features/ponds or pondless/koi pond installation, retaining wall installation, paver patios, concrete patios/sidewalks/driveways/colored concrete, waterproofing structures, berm installation, grading yards, sod installation and yard restoration

Avatar for Sanstead Excavating LLC

Sanstead Excavating LLC

11136 130th St
5.00(
1
)

Sanstead Excavating LLC

11136 130th St
5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Excavation Company. Owner/operator has 20 years of construction experience, specializing in water and sewer services. Also providing the following services: earthmoving, land clearing, trench digging, tiling residential properties, fixing sewer systems, digging footings, installing culverts, and the list goes on. Contact us to discuss your project needs.

"Done on time Good quality Good communication"

Jordan P on November 2023

Excavation Company. Owner/operator has 20 years of construction experience, specializing in water and sewer services. Also providing the following services: earthmoving, land clearing, trench digging, tiling residential properties, fixing sewer systems, digging footings, installing culverts, and the list goes on. Contact us to discuss your project needs.

"Done on time Good quality Good communication"

Jordan P on November 2023

Avatar for Imperial Construction Services LLC

Imperial Construction Services LLC

10001 Brunswick Road
5.00(
6
)

Imperial Construction Services LLC

10001 Brunswick Road
5.00(
6
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Imperial Construction Services, LLC is a family-owned business based in Pine City, MN. Specializing in new construction, remodeling, gutter installation, and storm damage repair, we pride ourselves on delivering exceptional service. Our expertise extends to seamless gutters, offering two sizes, color matching, and leaf protection. Trust us to enhance your home with quality craftsmanship and personalized solutions. Let us bring your vision to life and exceed your expectations. We are bonded and insured and provide free estimates! Contact us, we'd love to help.

"Awesome people to work with! Would recommend to anyone that is looking for work done."

Jeremiah M on May 2022

Imperial Construction Services, LLC is a family-owned business based in Pine City, MN. Specializing in new construction, remodeling, gutter installation, and storm damage repair, we pride ourselves on delivering exceptional service. Our expertise extends to seamless gutters, offering two sizes, color matching, and leaf protection. Trust us to enhance your home with quality craftsmanship and personalized solutions. Let us bring your vision to life and exceed your expectations. We are bonded and insured and provide free estimates! Contact us, we'd love to help.

"Awesome people to work with! Would recommend to anyone that is looking for work done."

Jeremiah M on May 2022

DB Property Maintenance L.L.C

181 1st St Nw
No reviews yet

DB Property Maintenance L.L.C

181 1st St Nw
No reviews yet
19 years of experience

Tried of high prices and Bad services Call DB property Maintenance at (612)916-8566. Were the customers always right! Serving All of Minnesota and Western Wisconsin Irrigation, Landscaping,Lawn needs.

Tried of high prices and Bad services Call DB property Maintenance at (612)916-8566. Were the customers always right! Serving All of Minnesota and Western Wisconsin Irrigation, Landscaping,Lawn needs.

The Finished Look

1235 Birch St N
No reviews yet

The Finished Look

1235 Birch St N
No reviews yet
24 years of experience

Here at The Finished Look we perform all areas that pertain to building and remodeling. We also have a cabin care taking branch as well that services lake homes in northern Minnesota. We are very close with our employees and boast safety and cleanliness. Winter work in many instances be eligible for a 10% discount.

Here at The Finished Look we perform all areas that pertain to building and remodeling. We also have a cabin care taking branch as well that services lake homes in northern Minnesota. We are very close with our employees and boast safety and cleanliness. Winter work in many instances be eligible for a 10% discount.

Renaissance Custom Design DBA Bruce Hinton

20239 Oreland Mine Rd
No reviews yet

Renaissance Custom Design DBA Bruce Hinton

20239 Oreland Mine Rd
No reviews yet
27 years of experience

We are one of the top 16 in the Nation for Stamped Concrete and Concrete Countertops. Your customized solution is only limited by your imagination and fits your budget. I am 6th Generation brick and stone cutters. We give more than our quote.

We are one of the top 16 in the Nation for Stamped Concrete and Concrete Countertops. Your customized solution is only limited by your imagination and fits your budget. I am 6th Generation brick and stone cutters. We give more than our quote.

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Basement Waterproofing questions, answered by experts

The purpose of crawl space encapsulation is to prevent mold and moisture from entering your space. If your vapor barrier is properly installed and intact, it will dramatically reduce the chance that your crawl space develops mold. That said, moisture can condense in the area. If you notice excess humidity, you may need to install a dehumidifier to stave off mold and mildew growth.

Standing water under your house can threaten its structural integrity. If water pools in your crawl space, it can damage the foundation and the structure above ground, causing wood rot, mold, and other problems. If you have a concrete foundation, standing water under your house can also make your foundation slabs crack.

Venting the crawl space can be a good alternative to encapsulation if you live in a dry climate and the moisture problem isn’t severe. You could also try a dehumidifier or install a vapor barrier on the floor, leaving the walls exposed. A new drainage system may eliminate the moisture problem if it is not caused by humidity.

Thankfully, you do have a few sump pump backup options in case it fails. One option is a battery-powered backup sump pump. Another option is using a portable backup generator as a power supply for your sump pump. Unlike a battery-powered backup which has limited power, a generator can run around the clock for as long as you need it. 

Or you can opt for a water-powered backup pump, which uses your home’s water supply as a source of power. However, this may not be the best option if you find your house frequently has low water pressure.

Proper basement ventilation is very effective at reducing humidity. Without enough ventilation, your basement is prone to mold and moisture damage. Your basement should have as much natural ventilation via windows and doors as possible, and if your budget allows, you should also consider installing an ERV system to keep basement humidity levels at bay.

The Onamia, MN 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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