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Products & Services

Products:

CleanSpace® 20-Mil Vapor Barrier
SmartSump™ Crawl Space Sump Pump System
UltraSump® Battery Backup System
SaniDry Sedona Dehumidifier
SmartJack® Crawl Space Support System
SilverGlo™ Wall Insulation Panels
TerraBlock™ Crawl Space Floor Insulation
Mold-X2 Treatment System
Interior Drainage Systems / Trench Drains
Optional Air Purifiers

Before and After Pictures from Union City

Peace of Mind Found in Sealed Crawlspace in Union City, CA

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Happy Customers Surrounding Union City, CA

Testimonials

Reviews

Work Requests

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Work requests in Union City, CA Project Location: Union City, CA

Mold and poor airflow in crawlspace

Project Location: Union City, CA

There is some leakage under the bathroom. Would like to get a quote to fix it.

Project Location: Union City, CA

Crawl.Space Clean and Attic cleaning and rodent proofing

Project Location: Union City, CA

Crawl space has damp soil and also bit of smell.

Project Location: Union City, CA

Mold musty smell

Project Location: Union City, CA

Crawlspace humidity and puddle

Project Location: Union City, CA

Wet Crawl space

Project Location: Union City, CA

We have discovered standing water in our crawlspace. We need to have the water removed and then a moisture barrier put in (probably). We also have a termite issue we need to address as well. Thanks!

Project Location: Union City, CA

Crawl space has high humidity and mold issue.

Reviews from our customers in Union City, CA

4.8/5
Ron N. Ron N. Hillview Drive

5.0/5
Simpson Simpson Burton St.

4.0/5
Karla K. Karla K. 94063, CA

There was some lack of communication between Alex and David about where the pump should drain in the yard, and there were some questions for me that I wasn't sure how to answer.

5.0/5
Ken G. Ken G. Touriga Drive

4.2/5
Bob D. Bob D. Marlin Ave

Your Concept seemed interesting to us and we knew we had to address the dampness under our home. We were impressed with the installation crew. they were pleasant, easy to deal with and seemed intent on getting the job done quickly in order to save us money on trenching costs.

4.8/5
Donald S. Donald S. Lynnbrook Dr.

We have found all of your people, including the installers to be VERY professional, which is unusual in this day! Thank you.

5.0/5
Matt K. Matt K. Novara Way

5.0/5
Lori D. Lori D. Canyon Lakes Dr.

Two reasons I used Clean CrawlSpace, Inc.- to cut down on musty smell in home and I like the idea of a clean space that I could even use for storage! July 2010

5.0/5
Mike D. Mike D. Alicante Drive

Thanks

4.6/5
Jim E. Jim E. Virginia Ave

Heard about you at the Home & Garden Show of Santa Clara & San Jose - we noticed a professional manner. You all were very professional every step of the way - you should all be proud to be a part of Clean Crawlspace.

4.4/5
Eric & Maggie P. Eric & Maggie P. Anamor St.

5.0/5
John P. John P. Kentucky St

Would like advice on closing up the existing crawlspace air vents. A lot of debris enter into the nice clean crawl space; not certain if I need air circulation as a building code or possible attempt to change this region into a conditioned space by installing air duct / ducts to provide heat

4.5/5
Tony B. Tony B. Hampton Ave

The foreman David was very friendly and accommodating. He communicated his plan well and got the job done quickly and efficiently.

5.0/5
Lana H. Lana H. Sunrise Court

Great service provided by everyone we came into contact with. Thanks!

4.6/5
Frank C. Frank C. Mercury Rd

Products were what I needed to resolve crawl space smell and moisture problems. Great Job! Thanks.

5.0/5
Mark M. Mark M. Cerrito Avenue

Truly exceptional service! My only regret is that I have but one Crawl Space for you to service!

5.0/5
Erick T. Erick T. Edison St

4.8/5
Jessica L. Jessica L. San Mateo, CA

4.0/5
Gary Gary Redfield Place

4.6/5
Bill D. Bill D. Contada Circle

Wee above comments

5.0/5
David B. David B. Waterloo Ct

Awesome, would recommend to anyone

4.8/5
Gini H. Gini H. Liquidamber Ct

System of sump pump seems to be working. Today is the first day of rain and it has been raining for about 9 hours. I checked what I could in the crawl space and it looks dry so far. The pump is quiet and I can tell the difference from the old one. This one seems to pump more often for shorter periods. May be keeping up better than the old one. Time will tell Hope it keeps working this well over periods of heavy rain

5.0/5
Warren K. Warren K. Oriskany

5.0/5
George A. George A. Sunnyvale, CA

5.0/5
Ed R. Ed R. Piedras Circle

Thank you again for a great job. The crawl space is one less issue I need to deal with.

4.0/5
Steve R. Steve R. Las Ondas Way

5.0/5
Richard Richard San Jose, CA

Very good company. David was a pleasure to work with and really helped make our crawl space job go smoothly. Thanks very much, I would highly recommend them.

Union City, CA's Professional Crawl Space Repair & Encapsulation

Crawl Space Repair & Encapsulation in Union City, CA

Since 2003, Clean CrawlSpace Inc. has helped homeowners in Union City, CA protect their homes from crawl space moisture, mold, and damage. As a certified CleanSpace® dealer, we use trusted solutions like vapor barriers, sump pumps, dehumidifiers, and insulation that is designed to last and backed by real results. When it comes to crawl space repair, we're the team other pros rely on. Even HGTV turned to us on House Detective to fix real crawl space problems.

What’s happening beneath your home matters. Musty smells, warped floors, and damp air often start in the crawl space but they don’t stay there. Moisture can quietly damage your structure, ruin air quality, and chip away at your home’s value. At Clean CrawlSpace Inc., we’ve spent over 20 years helping Union City, CA homeowners stop crawl space problems before they spread. We install proven systems like vapor barriers, sump pumps, drainage, and dehumidifiers, everything needed to protect your home from the ground up.

Services We Offer in Union City

Crawl Space Encapsulation: CleanSpace® 20-mil vapor barrier sealed along floors and walls to block moisture, odors, and outdoor air. Includes a 25-year transferable warranty.
Sump Pump Installation: Our powerful sump pumps come with airtight lids, built-in alarms, and optional battery backups, designed to handle water removal reliably, even during storms or outages.
Dehumidification: High-performance dehumidifiers like the SaniDry Sedona remove excess humidity, helping prevent mold growth and improving the air quality throughout your home.
Insulation for Crawl Spaces: We use water-resistant materials like SilverGlo® wall panels and TerraBlock™ floor insulation, built specifically to hold up in damp, low-clearance environments.
Mold Treatment & Cleaning: Mold-X2 products safely remove surface mold as part of a complete moisture management system.
Drainage Systems: Interior crawl space drains direct groundwater toward the sump pump, preventing water buildup and protecting your foundation.
Air Quality Solutions: Optional air purification systems help filter allergens, mold spores, and odors rising from your crawl space into your living space.

Worried about your crawl space? Get a free estimate.

If you're concerned about crawl space moisture, mold, or structural problems, you can count on Clean CrawlSpace Inc. for honest answers and proven solutions. We’ve earned the trust of homeowners in Union City, CA by delivering professional crawl space encapsulation, sump pump systems, drainage, dehumidifiers, and mold treatment that last. Schedule your free estimate today!

Get A FREE Quote!

Job Stories From Union City, CA

Peace of Mind Found in Sealed Crawlspace in Union City, CA

Balu's Union City, California, crawlspace was plagued by moisture and musty smells, gave him chills. Clean Crawlspace to the rescue! Our expert moisture control specialist Daniel Griggs identified the source of moisture in Thomas’ crawlspace. Then our skilled installation crew came, and sealed the crawl space using the innovative CleanSpace® Crawl Space Vapor Barrier system, creating a dry, durable, healthy environment that would prevent future mold growth. Drainage, sealing, and ventilation transformed the dank dungeon into a dry haven. The home no longer smelled earthy, floors felt warmer, Balu sleeps sounder. Peace of mind found, crawlspace fears vanquished. A happy ending, thanks to Clean Crawlspace and we couldn’t be happier.

Peace of Mind Found in Sealed Crawlspace in Union City, CA - Photo 2

Work Requests From Union City, CA

Project Location: Union City, CA

Mold and poor airflow in crawlspace

Project Location: Union City, CA

There is some leakage under the bathroom. Would like to get a quote to fix it.

Project Location: Union City, CA

Crawl.Space Clean and Attic cleaning and rodent proofing

Project Location: Union City, CA

Crawl space has damp soil and also bit of smell.

Project Location: Union City, CA

Mold musty smell

Project Location: Union City, CA

Crawlspace humidity and puddle

Project Location: Union City, CA

Wet Crawl space

Project Location: Union City, CA

We have discovered standing water in our crawlspace. We need to have the water removed and then a moisture barrier put in (probably). We also have a termite issue we need to address as well. Thanks!

Project Location: Union City, CA

Crawl space has high humidity and mold issue.

Project Location: Union City, CA

How much will a sump pump installation cost in the crawl space (~1500 sq ft) split by parts and labor ?

Project Location: Union City, CA

Our floors are freezing and our heating bill is too high. I think we need to have insulation or encapsulation done.

Project Location: Union City, CA

Was told by inspector when we purchased the house that it showed signs of flooding.