Did you know that most new homes develop basement leaks within 10 to 15 years and that "Over 60% of basements have moisture seepage, while 38% experience mold and fungus growth due to an elevated moisture level." (The American Society of Home Inspectors) Traditional, decades-old basement waterproofing methods have not passed the test of time and wet basements have become the most frequent complaint of homeowners.
What to do? If your basement is already leaking, you could hire a waterproofing contractor to install the standard interior French drains with a sump pump. Or, the contractor may recommend excavating down to the footers and waterproofing the foundation walls on the outside.
Sounds good but these waterproofing methods are not cheap. On average, exterior waterproofing will run you $15,000 (not to mention having to replace landscaping or even sidewalks) while interior perimeter drains cost around $6,000. You may be asking yourself, "Could I repair the wet basement myself? I am not what one would call a do-it-yourselfer."
The first line of basement waterproofing defense should always be made on the outside. Divert rainwater from the foundation by proper grading, gutters, and downspout extensions. These simple steps will go a long way but by no means are they the end-all solution.
Secondly, locating the source and knowing why your basement leaks on the inside can make your do-it-yourself waterproofing project surprisingly simple and inexpensive. Review the table below for the common reasons why basements leak and how to repair your wet basement:
|Basement Water Leaks Causes||Basement Waterproofing Products|
|Seepage through CONCRETE BLOCK WALLS||Waterproof concrete block walls with RadonSeal® Plus.|
|Seepage through POURED CONCRETE WALLS||Waterproof poured concrete walls with RadonSeal®.|
|Seepage through BASEMENT FLOOR||Waterproof basement floors with RadonSeal Concrete Sealer or waterproof and color-stain with LastiSeal Concrete Stain & Sealer.|
|CRACKS in poured concrete walls||Repair leaking cracks in foundations with DIY Foundation Crack Repair Kits or Professional Crack Injection Toolkit.|
|CRACKS in concrete block walls||Repair cracks in cinder block walls using ElastiPoxy Crack Filler Kit.|
|CRACKS in basement floors||Permanently repair floor cracks with CrackWeld® Floor Repair Kit.|
|Seepage through BRICK WALLS
||Waterproof bricks and mortar with LastiSeal® Brick & Masonry Sealer.|
|Seepage through FLOOR-TO-WALL JOINT||Permanently repair leaky floor-to-wall joint using ElastiPoxy.|
|GAPS between floor and foundation walls||Fill the floor-to-wall joints (>1/2") with ElastiPoxy Crack Filler Kit.|
|EXPANSION CONTROL JOINTS (saw cuts)||Repair control joints using ElastiPoxy Crack Filler Kit.|
|Leakage around PIPES/CONDUITS through foundation wall||Seal leaking penetrations with PipeTite Gap Filler Kit|
|Leaking rusty WIRE TIES||Waterproof wire ties with PipeTite Gap Filler Kit|
|MAIN SUMP PUMP FAILURE||Install a Hi & Dry Water-Powered or Battery-Powered Backup Sump Pump|
Whether you need to waterproof a new or old basement, damp concrete floor, wet concrete block wall, crawl space, stone foundation or leaky brick wall, RadonSeal® has a long and well proven history (est. 1997) of providing expert customer service and the most advanced, professional-quality basement repair products on the market. Our line of concrete sealers, foundation crack repair kits, and concrete floor repair kits are not only for professionals but also easy enough for use by the average homeowner.
Instead of investing in cookie-cutter waterproofing systems, which may not perform well or for very long, do-it-yourself basement waterproofing can be accomplished with a little know-how and by using the best products for your specific basement leak(s). We guarantee you will get long-lasting results without having to break the bank on expensive waterproofing methods.
We know from 15+ years of experience that basement waterproofing solutions are not always clear-cut! If you have questions about your basement or a particular project please contact a RadonSeal® service technician for expert advice.
Feedback from Customers
"I am selling my house and one of the major points of interest to the buyer is "Does the basement leak"? I have had my house up since last September. Since I put it up for sale, I have tried Drylock, ThoroSeal. Locktite, and Rockite. None of these products worked. I always had to say "Yes, I get water in the basement." I applied your product ... I can't tell you how pleased I am with your product." Rose E.K., OH
"I am very happy with RadonSeal. I used it on the basement floor of a house we have built in Cape Cod, and have found it to be excellent for curing and then, sealing concrete. I have been building houses for years but have never seen or heard of any other product that could compare to it! I would highly recommend it." Donald N., MA
Foundation walls will appear wet or start seeping water only intermittently after heavy rains. You may also notice spots of efflorescence ("white powder") on the concrete surface which is a telltale sign of capillary water seepage. If this sounds all too familiar, now is the time to act before your wet basement gets worse making repairs much more difficult.
If your foundation walls are already wet or leaking, allow the concrete to dry out for the best basement waterproofing results. You can speed up the drying time by drilling weeping holes in the bottom of concrete blocks, installing a fan in the basement to improve evaporation, or simply waiting for dry weather. Once the concrete is sufficiently dry, seal the foundation walls with RadonSeal® Deep-Penetrating Concrete Sealer.
Why RadonSeal? RadonSeal is not your average cement waterproofing sealer like those found in big box stores. Waterproofing paints, cementitious coatings, and membrane coatings will eventually loosen, crack, or peel, as they are pushed off by hydrostatic water pressure, trapped water vapor, and efflorescence. It could take a couple to several years, but eventually all waterproofing paints or coatings will fail needing to be reapplied again. A big problem if you have already finished the basement!
RadonSeal is different! Negative side water pressure and efflorescence cannot budge it. Once cured inside the concrete the internal seal is PERMANENT, which is backed by an unmatched limited lifetime, money-back warranty! RadonSeal works by penetrating deep into the concrete (up to 4"), chemically reacts with lime and alkalis, expands inside the pores, and cures as a mineral. It waterproofs concrete internally against water seepage, water vapor, and even against radon gas. RadonSeal combines concrete waterproofing, damp proofing, concrete preservation, and radon mitigation in one sealer!
If you want painted basemen wall, you can always apply a waterproofing paint after you have deep-sealed the concrete with RadonSeal. That will protect the waterproofing paint against water, moisture vapor, and efflorescence.
"Sounds to good to be true. What's the catch?"
There is none. RadonSeal does not change the appearance or surface profile of the concrete, contains no chemical solvents or VOCs (bonus!) and can be easily applied using a hand-pump "garden" sprayer (or paint roller).
Many older homes have foundations constructed of limestone, sandstone, or fieldstone. The weak link in these types of foundations is the porous, soft, and crumbling mortar. It provides an easy avenue for water seepage which gets worse and worse as the mortar deteriorates.
Stone Foundations – First remove any loose or crumbling mortar with a wire brush or a wire wheel attachment for an electric drill. Spray on RadonSeal Plus Concrete Sealer to strengthen and waterproof the old mortar. Then, if needed, repoint with new mortar. Sealing the old mortar first will prevent water from pushing off the new mortar. You can let the new mortar cure for at least three weeks and seal it also with RadonSeal.
The waterproofing seal is permanent! You cannot find a similar product in stores.
Note that RadonSeal will react inside limestone and sandstone, stopping the annoying crumbling of the surface. In case of fieldstone, you can wipe it off with a wet rag before RadonSeal dries out on the surface.
Brick Walls – To properly waterproof clay brick walls (like Chicago brick) use LastiSeal® Brick & Masonry Sealer. Like RadonSeal, LastiSeal penetrates deep into porous bricks and mortar but it cures as a plastic. The seal will never peel or crack because it does not form a surface film. It holds back hydrostatic pressure and will also strengthen and harden the bricks and mortar.
Once cured, the waterproofing seal is practically permanent (a 15-Year Waterproofing Warranty).
There is no similar product sold in stores!
Many homeowners have found out the hard way that paints and coatings alone are just not suitable for concrete floors. Latex-based waterproofing paints are too soft for floors. And if you apply an epoxy or urethane coating, concrete floor paint, or concrete overlay, years of water vapor pressure and efflorescence coming through the concrete pores will soon enough make it to fail, crack, or peel.
Seal Your Basement or Garage Floor - The proper method is to deep seal the concrete floor first with RadonSeal Concrete Sealer. RadonSeal provides the permanent waterproofing solution for concrete slabs by stopping capillary water seepage due to hydrostatic pressure or wicking water. It also restricts the inflow of water vapor through the pores. It practically eliminates efflorescence and concrete dusting. RadonSeal does not change the surface appearance or profile, leaving the concrete suitable for paints, adhesives, tiles, flooring, epoxy, and coatings. It is as a great primer!
Use RadonSeal to preserve or dry out wet basement floors, garage floors, concrete driveways, patios, and pool decks. RadonSeal is not designed to seal cracks or gaps – you may need a crack repair kit.
How To Repair A Leaky Concrete Floor Crack - A popular method is to route out the crack 1/4" wide by 1/2" deep and fill it with self-leveling caulk or hydraulic cement. But the caulk or hydraulic cement are certain to get loose and you have to route it out again.
Instead, permanently repair the crack using CrackWeld® Concrete Floor Repair Kit (pictured). It provides a strong, full-depth repair of cracks in concrete slabs, be it hairline or 1/2-inch wide. Stronger than concrete – the crack will not move, get longer or wider. And there is no need to chase the crack before application.
Most homes, both new and old, develop a crack or two in foundation walls. If the cracks aren't leaking, it is only a matter of time till they do as the exterior waterproofing coating gradually deteriorates. So, if your basement cracks are not leaking yet, now is the time to repair them to avoid water damage and potential mold growth.
When it comes to foundation crack repair, temporary fixes simply do not last. Caulk will peel. Hydraulic cement does not bond well to concrete and will eventually get loose, letting the water in.
Repairing cracks yourself may appear to be a daunting task but surprisingly, it is quite easy. RadonSeal® DIY Concrete Crack Repair Kits or Professional Kits allow you to repair cracks in poured concrete walls like a pro! You will save $100's and the repair is permanent!
|Click for a larger image!|
The most common complaint from homeowners – "Water is coming up from the corner floor-to-wall joint!" Or, "There is lots of water pushing up from underneath the slab!" However, this is usually not true.
We receive many emails from homeowners looking for answers to questions about how to solve their damp basement issues. Here is a couple of recent ones that you may relate to:
Q: "I have a damp basement wall with efflorescence and some crumbling (see picture). Since this picture was taken, the wall has mostly dried up (as the weather has gotten colder and the air dryer). Which product do you recommend I use to seal my basement wall?"
A: Prepare the concrete first by removing the efflorescence and use our RadonSeal Plus to seal the basement wall. Please take the time to read about sealing porous cinder blocks.
Q: "Will RadonSeal work on brick and mortar on a house or only for concrete/cinder block?”
A: RadonSeal can seal brick, but not as well as our LastiSeal® Brick & Masonry Sealer, which is specifically designed for sealing brick and porous stone. RadonSeal is based on a chemical reaction so there is a chance it may discolor the brick. LastiSeal penetrates similarly to RadonSeal, fills the pores, and cures but without a chemical reaction.
Each method has its pluses and minuses. None, however, provide a solution for both basement walls and floors, and all cost much more than the using RadonSeal basement waterproofing products: