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Concrete Foundation Waterproofing & How to Stop the Source

Concrete foundation waterproofing can be a band aid that hides bigger issues. Find and fix the water source. In the long run this will be a longer lasting solution not to mention a much drier one.


Pin Point the Source

Bad smells, molding, peeling paint, wet carpet, unexplained moisture on tile and spotted walls are signs of moisture leaking through the foundation. Why is there water under and around your home foundation? Most of the time, it is either foundation drainage issues or under slab leaking pipes.

Foundation Drainage

Know your water sources. They can include broken gutters/downspouts or poor drainage during the rainy season.

Gutters and Downspouts Video: Homeowners see it every year: spring storms, flash floods and rapid downpours that transform homeowners’ yards into massive puddles. Days later feet still sink into muddy lawns. Gutter downspout drainage systems can help by moving that standing water away from homes. 

French Drain Video: A foundation French drain system is simple to install. The supplies can be foundation at any local hardware store. Foundation French drains can be a very effective way for draining subsurface water away from a foundation. Follow this video for simple steps on how to install a foundation French drain system.

Foundation Landscaping Tips: Set up foundation landscaping so that it takes care of home foundation maintenance. Learn how to water your garden while keeping foundation moisture levels even. Find planting selection suggestions. See how foundation swales help move water away from the foundation.


Under Slab Leaks

Sewer, septic or water pipes break and leak under slabs. Unexpected water bill spikes and foundation heaving are a sure indication of a water leak. Fix the leak and you fix the moisture problem while avoiding additional damage to your foundation. 

Follow our DIY Leak Detection Video for tips for simple step by step water leak detection check anyone can do with leak detector equipment found at any hardware store. Start with shutting off all the water in your home and then check your meter. If the meter is moving then you probably have a leak. If the meter is not moving, you make have a sewer/septic problem. Unfortunately these types of leaks require a plumber. Call a professional to test for a more detailed slab leak and to have the leak fixed.

Whatever the source of water is you are going to need to deal with it before you can start waterproofing foundations.


DYI Concrete Foundation Waterproofing of Cracks

Now that the water source has been taken care of, you can fill foundation cracks.

  • Exterior Foundation Cracks
    Silicone caulking is an easy DIY fix for waterproofing foundations with cracks. Isolate where on the foundation the work is needed to be done. Completely expose cracks, cleaning out dirt or debris. If using water let dry before applying the silicone. Let the silicone dry before returning any mulch or landscaping products.
  • Interior Foundation Cracks
    Locate foundation cracks. Completely expose cracks by removing the carpet or other flooring. Let wet areas dry and then clean all dirt or debris from the crack. If using water let dry before applying the silicone. Apply the silicone evenly throughout the length of the crack. Run a trowel or scraper over the silicone ensuring the silicone is flat on the surface. Unevenly dried silicone makes floor covering uneven as well. Let the silicone dry before reinstalling flooring material.

Note: If one side of the crack is higher than the other side of the crack, you may want to have a foundation expert check that your foundation is level and stable.


External Foundations Waterproofing Membranes & Moisture Barriers

Moisture barriers are vertical layers of plastic that are buried in the ground. As water flows up against a moisture barrier, it is stopped and prevented from getting under a home. There are many ways for waterproofing foundations here are four methods in particular. 

  • Exterior insulated finish systems (EIFS) waterproof outer foundation walls. EIFS creates an aesthetically pleasing coating over outer concrete walls while providing a moisture resistant surface. It serves a dual purpose of insulating and waterproofing outer foundation walls.
  • Polymer-based liquid membrane coatings are for both outer walls and floors. Either sprayed on or rolled onto concrete directly. While they are quick to apply and low in cost, their application does not always offer an even surface coverage.
  • Self-adhering sheet membranes provide the consistency that liquid membranes do not. Be careful as they stick to anything, improper installation leaves gaps, and you need two people to install.
  • Silicone sealants are an easy to use method for waterproofing foundations. They serve a dual purpose of crack filler and sealer. They are best used for cracks that are one quarter inch thick or less. Application can be by done by either using a sprayer or a paint roller. 


Wrapping Up

While waterproofing foundations may keep out the water it might not solve the cause of the problem. Early detection and water diversion techniques are the best ways to reduce the chances of significant foundation waterproofing issues. If you need help determining the cause or fixing the aftermath, call a professional to inspect your foundation repair issue.


Frederick Marshall is the CEO of Advanced Foundation Repair, LLC, a foundation repair company specializing in home repairs from the foundation up including foundation repair, foundation drainage, exterior foundation waterproofing, foundation irrigation, and plumbing services. Advanced Foundation Repair has specialized in foundation repair needs of Texas homeowners for over 100 years. Connect with him on Google+.


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Christopher Lorenzo
Christopher Lorenzo
19:36 06 Sep 17
I have had multiple good experiences with Advance Foundation Repair. They stand by their work and kept me informed at all times on the repairs. Post work service was good too. I am very satisfied with their workread more
Ruth Schuman
Ruth Schuman
19:56 05 Sep 17
Workers were very professional and hard working. They dug up around the house and put plants back to look nice. This company also has a trust to forever be able to redo warranted work.read more
Gwen Baumann
Gwen Baumann
02:30 11 Aug 17
I can't too highly recommend this company. I had work done of my foundation by another company several years ago. That work did not resolve the problem, and that company did not fix. Advanced was recommended to me by mother, who said they were the best in the business. I agree! They were polite, professional, charged reasonable prices, and did excellent work. They also have a strong guarantee that is backed by a trust. I can't imagine why you'd use any other company.read more
Linda Krizka
Linda Krizka
19:44 10 Jul 17
Advanced Foundation repair is the only way to go! The engineer, Eric was kind, helpful and informative! The crew under Haynard's watch was unbelievably considerate. The crew was in and out of our house for 5 days. Everyone of them were happy even in the 90 degree weather. They work hard and were very polite. If you saw my house now you would never even know they were here. They cleaned up every night and on the last day it looked like new! Very thankful to have been able to work with them.read more
Michael Francis
Michael Francis
00:48 29 Apr 17
Advanced recently performed our foundation repair and did a fantastic job! The job took four days and throughout the process, the workers were on time each day, were kind and courteous. They left our house clean each day and took great care in making my wife and newborn comfortable during the repair. They came back out to make adjustments, as was expected, and I am more than pleased with the results. Thanks to Juan Martinez, Miguel Mata and Ernesto Alvarato for doing everything I requested. I highly recommend Advanced Foundation Repair, they know what they are doing.read more
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