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did an assessment of our water issue in the basement, which appeared to be due to hydrostatic pressure from below. They suggested installing" a sump pump in a corner of the house. Other contractors, suggested larger fixes that included adding extensive drain systems and would have been much more expensive.
's position was that we should try the simpler solution first. I appreciated the effort to keep costs reasonable and only consider the more expensive fix later, if deemed necesssary. We had water in our basement again 9 months later. They came out and checked things out. The sump pump was working properly and the issue was completely unrelated (a neighbor w/ a leaking pipe). They did not charge for the visit.

-Eva H.

"We had our basement waterproofed after a flood from a faucet. We noticed we had water coming through the bricks so we wanted to get it fixed before renovating the" basement.
were great and gave us a reasonable price. They were on time and left out house clean after! Would definitely use them again.

-Angela R.

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Local Articles in Washington DC

6 questions to ask a basement waterproofing contractor

If you need basement waterproofing work, make sure you ask your basement waterproofing contractor these key questions about licensing and experience.

What to expect with basement waterproofing

Waterproofing a basement can be a costly, but necessary, investment. We asked highly rated basement waterproofing companies to provide their best advice.

It only takes about 48 hours for mold to form in a wet basement. (Photo by Michelle B. of Fishers, Ind.)
Basement Waterproofing

Tired of your basement flooding every time it rains? Angie Hicks explains the most common basement waterproofing methods and provides an average cost for each.

Preventing a water problem in your basement starts with finding the best quality products for the job. (Photo courtesy of Angie's List member Huy L. of Philadelphia)
Basement Waterproofing

Out of sight, out of mind: Don't ignore potential problems with your basement or foundation. A professional explains why it's best to be proactive.

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Contractors say homeowners with this trait are the most satisfied with home improvement projects.

The damage done by neglecting a crawl space is likely affecting you more than the eye can see, says Vallone. (Photo courtesy of Angie's List member Nancy T. of Seattle)
Basement Waterproofing

It’s easy to do, but forgetting your crawl space can have plenty of negative consequences for the rest of your home from poor air quality to high energy bills.

Angie's Answers

Mold in a basement is a common problem. My company helps people with this every day. Some of the answers you received were helpful but not all the information is correct. First, you need to eliminate the two main ingrediants that mold needs to survive. The first one is water intrusion. This is a must. I am assuming you have no water intrusion as you make no mention. The second componant that needs to be eliminated is moisture. Moisture is also humidity. Basements need to be kept airtight in the summer months. Some folks have posted that you need air flow in your basement. Nothing could be furthur from the truth. When you open any windows for example, not one micron of air goes out of the basement, Warm humid air is sucked into the basement. Houses suck air into the basement and it meets the cool surfaces and skyrockets humidity. The windows must be kept closed and a dehumidification device installed to ensure humidity stays below 60% humidity. The dehumidifier should be energy star rated and purchasing a seperate humidity guage is a must to monitor the unit's progress. We like to keep our customer's basements at 50% humidity. This eliminates the smell that is active mold spore growth. Once the water and humidity is brought under control. Remove the organic materials that have mold on them. Walls, sheetrock and studs that have been affected. Follow the advice of previous posts as you must ensure that you do not affect the rest of the home. Once removed, install new walls using as much inorganic material as possible. We also install vapor barrier over the walls and seal the floors to stopwater vapor transmission into the basement. Poly plastic is not a acceptable vapor barrier. It is not "zero-perm" and will still allow moisture transmission. It will also crack and break into pieces over the years. A PVC liner rated "zero-perm" is the correct product in this application. Depending how large the basement is and if it is sectioned off will determine the dehumidifier strength. We use the Santa Fe line of dehidifiers as they are super energy efficiant and work like a dehumidifier on steriods. I hope this helps and I wish you the best in Basement Health!

Where is the home located, what is the exterior wall construction and type, how is the space heated?


It could be a whole host of different scenarios that would generate that result.  It is nearly impossible to tell but I would say that most basement moisture problems are a result of bulk moisture intrusion or condensation issues. 


Given the deep and hard winter this year, it could be a condensation issue that hadn't previously been shown.




Basement Waterproofing reviews in Washington DC


The gentleman looked over my problem and gave me advice that I am unable to followup on, i.e., ripping out a newly installed floor
and encapsulating the crawl space. I will ventilate it instead.
- Marcy L.

It went great! Could not be more pleased with this small business!
Washington DC Waterproofing Contractors Provider Name Locked
came out and
gave me a quote for getting a sump pump installed to deal with a leak
coming into the basement down an old, no longer used (addition built on
top of it) staircase. He gave me a fair quote for the work and we
scheduled it.
Washington DC Waterproofing Contractors Provider Name Locked
confirmed the night before that his guys would be at
my house the next morning and they showed up on time and courteously
explained what work would be done and then laid down a bunch of tarps to
protect our floors and keep the house clean as they brought in their
After removing a step at the base of the old stairs,
they discovered that we did not in fact need a sump pump as there was a
existing, functioning drain that was there which was working fine. They
came and got me and let me know that they did not need to install a
sump pump and demonstrated this by pouring a five
Washington DC Waterproofing Contractors Provider Name Locked
bucket of water
down the drain. They cleaned the area and told me they were not going
to charge me for this work. I tipped them all and promised them I'd let
my friends know about this honest, hard-working company if they have
any basement waterproofing needs. Bravo, and thanks!
- Brandon M.

The provider was great - he looked around the basement and outside the house. Seemed knowledgeable and very professional. Suggested a new dehumidifier, but did not pressure us to buy it right away.
- Shaambhavi P.

They installed a french drain and pump and installed water proofing on the walls. Initially I thought some of the workers were not really the best, so I called and a manager came out and was very honest and acknowledged their faults and came out and fixed all the issues. I was very impressed with this, he was very responsible. They ended up doing a fantastic job in the end.

Great, he was very professional, explained everything very well. He spent a good bit of time talking through options and even brainstorming financing options, but it's just too expensive for me at this moment since I don't really have problems with moisture. If I do in the future, I'd get it since it comes with the lifetime guarantee.
- Abby L.

Very well.
Washington DC Waterproofing Contractors Provider Name Locked
helped figure out that I was also absorbing water from my neighbor's adjoining property. So, with her permission, his team drilled weep holes through the wall that separates our back doors. That way, the water that backed up on her side would come under the wall and into my nEw drainage system rather than through her doorway and into the internal adjoing basement wall.
- Winifred Q.

Horrible. I picked this company based on the reviews and am overall disappointed. Not disappointed in the product, but the customer service and finish work. I had made arrangements for access from back fence neighbor's, as due to the slope of my yard, they could not bring in the backhoe through my yard. It was a one time in and one time out. This was clearly communicated to their crew supervisor, but not made clear to the work crew. They continued to use this access until I caught them a couple days later. And didn't seem that concerned, but their English was so limited it was possible they did not understand. Even when discussing my concerns with the owner, there was an attitude of "they use access from other yards all the time". May be true, but they don't have to live in the neighborhood, so I think they should follow the job owner's guidance. When they finished the job, they just came and picked up their equipment on a Saturday while I was out. No "Job is done, do you have any questions/concerns?" I would have loved to discuss the mud pit that was left in my yard. The fact that my exterior pump has a long extension cord running to the outdoor outlet that was not even concealed. The yard was not even finish graded. Granted I did not pay for fill to be brought in, but they left pits where the backhoe had sat. And there are pieces of concrete slab that they were supposed to have removed, all over the yard. Again, a phone call to the owner with not much success.
For the amount of money I paid, I would have liked to have had a visit from the crew chief at closing of the job. And if you have called the owner on no less than 3 occasions for issues, a visit from him would have been appropriate as well. I know I have more waterproofing to do in my old house. This job was just the first step. They lost a lot of potential return business by poor customer service.

The estimate visits went very well. I had the estimator come out twice because we decided that we would like to price out some other services. The estimator was prompt, mannerly and professional. He explained the details of what would be done in a logical fashion and didn't appear to try to upswell products/services. I will provide an update once the work is completed.
- Naima J.

All Waterproofing Contractors in Washington DC

Companies below are listed in alphabetical order. To view top rated service providers along with reviews and ratings, Join Angie's List Now!

TAF Services LLC

7125 Dale Ct

Taylor McDuffie Development & Contracting LLC

1920 Martin Luther King Ave

TCS of Northern Virginia

9020 Dellwood Dr

TDI Construction Group Inc

13800 Coppermine Rd

Tech 24 Construction

5256 Eisenhower Ave

TF Construction LLC

4119 Postgate Ter Apt 302

The Finished Basement Guys

14219 Woodcrest Dr

The Flood Masters, LLC

6201 Leesburg Pike Ste 6

Tri State Home Services

8500 White Pine Dr

Triton Design Group,Inc

6312 Seven Corners Center #362

Tru Builders Construction

14011 Fernie Field Ct

true american services llc

4412 Josephine Ave





U 1st Home Improvements

7757 Belle Point Dr

U.S. Builders Inc


United Team Contracting

12730 Silvia Loop

Universal Maintenance

65173 Seventh Road

USA Interiors, LLC.

P.O. BOX 9272

VRN Masonry Inc

19424 Laguna Dr

Waterproofing Inc

17800 Whimsey Ct



Wescond Paint & Construction

43150 Broadlands Ctr

Winston's Chimney Service

3158 H Spring Street

Worldwide Concrete

8259 Baltimore Annapolis Blvd.

Youth Concrete Service, LLC

9606 Coral Street
Upper Marlboro

Zometa Remodeling

10312 Geranium Ave

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