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

Avatar for Groundworks
Groundworks
4.1(
274
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Holly, CO and surrounding areas

Approved (Corporate)

In business since 2021

Free estimates

Warranties offered

"This company is top notch with very professional workers and courteous reps to give you an estimate. This was by far the BEST job for the money. It was 6 times LESS than Applewood. Yes, I'm not kidding. You will not be disappoint!! Thank You Complete Basement Systems!!"
Protect Your Basement Before & After
Correct Your Wet Basement
Protect Your Basement
Waterproof Your Basement
Protect Your Concrete Before & After

+16

83 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Buzz Bees Plumbing & Repair LLC
Buzz Bees Plumbing & Repair LLC
4.9(
10
)
Basement Drainage Channels - Install

Serving Holly, CO and surrounding areas

In business since 2012

Free estimates

Credit card accepted

"My old water heater went out yesterday and of course leaked water all over. I shut it off and stopped the leaking. Called early this morning looking for someone to install a new one. Jim was actually sent over by another plumber who could not get to my job right away. Jim showed up, looked at the job, we talked about the options and he gave me a bid. Let to get the new water heater. We back in about thirty minutes. He had to make some changes to the water and gas lines. Added shut offs and installed new one. Took the time to explain operation and maintenance of the new one. Cleaned up the work site. Removed all debris and old water heater. I was impressed with his work and his attitude.
"
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Recommended by90%of homeowners
D & D Contracting
4.4(
5
)
Basement Drainage Channels - InstallFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Holly, CO and surrounding areas

In business since 2017

Free estimates

Credit card accepted

Welcome to D & D Contracting! We take pride in the quality of work and customer satisfaction that we give each and every customer. We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!

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2
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4
5

+13

Response time2 days
Recommended by80%of homeowners
Avatar for Thrasher Foundation Repair - Denver
Thrasher Foundation Repair - Denver
New to Angi
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Holly, CO and surrounding areas

In business since 1975

Free estimates

Warranties offered

With 50 years of experience in the basement and foundation repair industry, Thrasher Foundation Repair offers trusted services to homeowners around Denver, CO. Recognized for our exceptional commitment to leadership, character, and organizational ethics, we are proud recipients of the 2024 International BBB Torch Award for Ethics. From cracked concrete repair to basement waterproofing and crawl space encapsulation, we provide state-of-the-art solutions to keep your foundation safe, dry, and healthy. Here at Thrasher, we guarantee precise repair and genuine care. We proudly offer our services in Fort Collins, Colorado Springs, Aurora, and surrounding areas. Contact us today at 303-586-5570 for a free inspection.

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+9

Response time1 day
Response rate100%
Avatar for Spray Specialists LLC
Spray Specialists LLC
4.0(
1
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Holly, CO and surrounding areas

In business since 2024

Free estimates

Offers commercial services

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

Response time7 hrs
J&J Services LLC
New to Angi
Basement Drainage Channels - Install

Serving Holly, CO and surrounding areas

In business since 2020

Free estimates

Credit card accepted

H&A Dumping Services LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customer's interests and make their concerns the basis of our business. Please give us a call today!

Basement Waterproofing FAQs, answered by experts

A leak under your foundation from a water supply line or sewage line is likely to lead to water pooling on certain areas of your property during rainfall, abnormally fast-growing or green grass in certain sections of your lawn, and differential settlement of your foundation, which can result in large foundation cracks, windows and doors failing to operate properly, a wavy or sloping roofline, or damages or irregularities in your interior walls, including cracks and bulging. If it’s a plumbing line embedded in your slab, you’ll also likely notice above-average water bills.

A crawl space is an area under the house that provides access to plumbing, electrical, heating ducts, and other HVAC units. Its purpose is to create a buffer between the ground and the living area, helping with ventilation, moisture control, and access for maintenance or repairs. Crawl spaces are most often seen in houses in North America which are built on concrete foundations versus other parts of the world where buildings are constructed differently.

Water damage always poses a primary risk of mold and mildew, but growth is not guaranteed. Whether mold develops depends on several factors, including the severity of the water damage and how quickly the area is addressed. To prevent mold, you must act fast—ideally within the first 24 hours. The process involves cleaning up all standing water and thoroughly drying the affected area. If the damage is extensive, the cleanup was delayed, or you suspect mold might be present, it is safest to assume it has grown and contact a professional mold inspector or removal expert to assess the situation.

Yes, crawl spaces can attract bugs, especially since moisture tends to build up in the space, and moisture attracts pests. A good way to prevent pest infestation in your crawl space is to install a vapor barrier—called crawl space encapsulation—on the interior to seal the space, along with a French drain or some other kind of foundation drainage system outside to keep runoff out of your crawl space. You can also seal foundation cracks and repair damages to cut off access to pests.

Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.

The Holly, CO homeowners’ guide to basement waterproofing services

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