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Question DetailsAsked on 10/14/2011

Anyone familiar with the Beaver Basement Waterproofing system? Does it work?

I need to waterproof my basement. It gets a small trickle of water coming from one foundation wall. The water trickles across the floor of the rest of the basement. Not what I would call a flood by any means. Basement waterproofing contractors have quoted me as much as $15,000 to install a drainage system under the concrete. I've heard that the Beaver system is much less expensive. Anyone have any experience with this?

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8 Answers


A beaver is an old term for building a dam in front of the wall, Also was called a top cove system. Consisted of a metal or plastic coving glued to the basement floor and left open at the top. The top is very close to the basement wall. Before EPA the trick was to leave opening in the cove at the basement drain and chip a channel to the drain from the opening in the top cove system.. Beavers build dams hence the name. Can be very evvective and legal if you run water into a sump pump pit. Yes I ran several waterprooging companies in the 70's when this system was sold by a gentleman named Thrasher in Omaha,NE.

Answered 8 years ago by jccasper


The Beaver system is a baseboard type system that is usually epoxy to the floor. These systems are unreliable compared to a interior drainage system such as Grate Drain. Grate drain is installed under the floor IN FRONT of the footer. DO NOT HIRE A COMPANY PROPOSING TO INSTALL A TOP OF THE FOOTER SYSTEM!!!!!! The interior pressure is not relieved with a on top of footer system and usually allows harmful soil gas and humidity to escape into the basement. The Grate Drain system is a "closed system"
Please research www.basement as a great website. Contractors on that website are recognized by the NAWSRC. (national association of waterproof and structural repair contractors)

If you are only getting some seepage, have a NAWSRC contractor install a sump pump only as a start. That will remedy the water pressure under the foundation and has a good chance of working. If you have a sump pump, make sure it is professionally installed. I HIGHLY RECOMMEND A GRATE SUMP (search Grate sump pumps) as they allow much more water to get to the pump. The Grate Drain system is very modular, if the pump alone didn't work, they could add some Grate Drainage along the perimeter to relieve some pressure.

Basement companies LOVE to sell you a full system but because the fact that the system is modular, you can use a cautious approach.

Remember, cheaper isn't better when it comes to foundation work.


Answered 8 years ago by vermontguy


We had a similar issue and hired a professional engineer to come out and evaluate it. This was only $350. Like, you, we had several companies trying to sell us on digging trenches in our floor and then putting in a sump pump, all at tremendous expense. The professional engineer told us all that was very unnecessary. He advised us to simply make it so the downspouts would get the water further away. I did the work myself with some exterior grade pvc piping and viola! No more water coming in at all. I think I did everything for about $100 and my own labor. Most of it took only maybe 4 hours.

We don't know your exact situation but if you have a downspout from your roof drainage over there, then make it so that all that water gets AWAY from your house, at least to the point where the ground will continue to slope away and you'll be set. Fix the root cause, if at all possible, instead of trying to deal with the water that will force it's way in, if allowed to sit against your foundation.

Answered 6 years ago by Jefferson


I had a xxxx Water proof system in my finished basement and I will sware by it.

The first year in our home, we had a superstorm hit. We received 10 inches of rain in the overnight. My neighbors basement had about 2 feet of water in their basement. Mine was completely dry thanks to the xxxx basement warterproof syste.

Answered 6 years ago by firelt


I have used this system in 3 different buildings. 2 in the basement and 1 with no basement. Absolutely no problems. works great.

Answered 5 years ago by rjctruck


I have had the xxxx Basement type 2 system for 6 years now and love it!! I installed it myself and it cost me around $600 for everything I needed to do my entire basement. I had a neighbor that had a company come in to waterproof his basement and it cost him over $13,000. I have since done 3 other basements with the same system with 100% satisfaction from the homeowners. I would definitely recommend it to anyone that is handy and wants a diy waterproofing system.

Answered 2 years ago by Mdf312


We have one in our basement. I am not sure when it was installed. We have lived here for 20 years and I just now have gotten a spot where the adhesive has failed, however, I too have gotten quotes from places and the cheapest so far is $10,500. I am considering trying to find an adhesive that I could maybe put over the existing system. It has held up for the 20 years and I hate to dig up my basement, not only having to move water heater and all the shelving etc...

Answered 8 months ago by MaDr


We have a xxxx system in our basement, and mold and mildew has formed from the standing water just above the dam at the base of the floor. Having someone come examine the mold and mildew as it has caused respiratory problems for us in the house. Not sure it's the best idea, especially if there is a bedroom or living space in the basement.

Answered 3 months ago by jlachine

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