Skip to Main Content

Basement Waterproofing in Longmont, CO

Review Logo 4.7 (2,299)

For homeowners in Longmont, effective basement waterproofing is essential to prevent water seepage and protect against the damaging effects of mold. Common challenges include wet basement floors, efflorescence, and moisture infiltration, all exacerbated by the region's fluctuating temperatures and seasonal rainfall. Our expert professionals utilize innovative techniques like BasementGutter™ Interior Drainage and the AquaStop™ Sump Pump to keep basements dry and maintain structural integrity. Through thorough inspections and customizable solutions, we ensure homeowners can rest easy knowing their basements are well protected.

Groundworks has been a trusted leader in the home repair industry since 1999, committed to delivering exceptional service and results to the Longmont community. Our A+ BBB rating underscores our dedication to quality and customer satisfaction. Our certified field inspectors provide free in-home assessments and personalized quotes, ensuring tailored solutions for every homeowner. Trust in Groundworks to address your basement waterproofing needs with the highest level of professionalism and expertise.

See more  See less 
Schedule inspection icon

Get started with a free inspection!

Groundworks is Longmont's Basement Waterproofing Expert

Trust Signal Badge 1 Trust Signal Badge 2 Trust Signal Badge 3

Recent Work Completed Near You

15,551 basements waterproofed by the Denver branch

Why your neighbors trust Groundworks

We've earned 2,051 five star reviews.

"We have had a foundation restructure & crawlspace finishing, in February 2025. They gave us a detailed contract, and time to arrange finances. They were informative, professional, worked very hard, and actually completed early. Francisco, Rene, and Salvador, were friendly and polite. Throughout, they were focused, proud of their work, and exhibited strength & confidence. This is easily an anxiety-producing endeavor for a homeowner, . The met every difficulty with experience. Thank you so much."

1,769 of your neighbors recommend our local Groundworks branch.

Our in-house crews are certified and local to your area.

Our work comes with a nationally backed warranty.

Common Causes of your Basement Problems in Longmont

Foundation Cracks

Cracks in foundation walls or floors can let water seep into your basement, especially during heavy rain.

Poor Drainage Systems

Ineffective drainage, such as clogged gutters, downspouts, or poorly graded yards, directs water toward your foundation.

Hydrostatic Pressure

Water in the soil builds pressure against basement walls, filling the clay bowl, and forcing water through cracks and joints.

High Water Table

Rising groundwater during heavy rain or snowmelt can seep into your basement through cracks or porous concrete.

Faulty or Missing Sump Pump

Water from heavy rainfall or flooding can accumulate in your basement without a working sump pump.

Plumbing Leaks

Leaking pipes or fixtures near your foundation can saturate the soil, causing water to seep into your basement and cause moisture related problems.

Basement Waterproofing Solutions We Provide For You in Longmont

Control Wall Moisture

What We Do

  • Inspect basement for vulnerabilities
  • Take custom measurements
  • Provide lasting moisture solutions

What We Use

Vapor Barrier Learn More

Control Groundwater Seepage

What We Do

  • Identify leakage sources
  • Consider your home's unique needs
  • Install a reliable drainage system

What We Use

Sump Pump Learn More
Drain System Learn More
FreezeGuard Learn More

Control the Environment

What We Do

  • Recognize ventilation insufficiences
  • Offer options for moisture control
  • Regulate humidity levels effectively

What We Use

Dehumidifier Learn More

Our Other Services in Longmont

Our Groundworks' Longmont Office Serves You

Schedule inspection icon

Trust the experts at Groundworks

How it works

Straightforward and simple process

Schedule an inspection icon

Schedule an
inspection

Upon arrival, our Inspector will introduce themselves and chat with you about the problems you're experiencing. Based on the information you provide them, they'll then create a plan of action to examine your home inside and out.

Receive a detailed repair plan and quote icon

Receive a detailed
repair plan and quote

Once the inspection is complete, the Inspector will sit with you and present their findings. And because we provide same-day estimates, you'll have all the cost and financing information you need to make a decision right away.

Get the work done when you're ready icon

Get the work done
when you're ready

When you're ready to move forward with repairs, we'll help you choose an installation date that works for your schedule, and notify our Installation team immediately of the upcoming work.