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dadof5

07:22AM | 09/17/04
Member Since: 09/16/04
16 lifetime posts
Bvmisc
I moved into a house with a 20year old basment addition, I have an interior drain around the inside walls leading into a sump pit(its working) but I still get water leaks along one wall with heavy rains.

I think I need a french drain on the outside of the wall along the foundation but I am not sure how to go about building one. I'm pretty challenged when it come's to this stuff so the more detailed the directions, the better. Thanks in advance the help.

homebild

04:13PM | 09/17/04
Member Since: 01/28/03
694 lifetime posts
Installing a french drain around the exterior of the foundation is a very good but cost prohibitive idea.

Even for a modest sized home, the cost can easily exceed $20,000.

If you have that kind of money to spare and can recoup the investment by creating additional living space below ground and in your property value, then consider it.

Otherwise live with the water entering your basement.

cellarwater

11:16PM | 09/17/04
Member Since: 12/09/03
178 lifetime posts
Yeah, big job. Pending on how deep this foundation is. This water that comes in. Does it come in only when it's raining? if so check the roof gutters, and the ground to make sure it is not ponding around the foundation wall. That might help a bit,to get rain water away from there.Try it out.C.

dadof5

05:15AM | 09/18/04
Member Since: 09/16/04
16 lifetime posts
It only leaks with heavy rains, but it has leaked about 10 x in the past year and its a finished basement. I pulled some baseboards to find moldy rotting 2 x 4's behind the drywall. The gutters all drain to the front of the house and are working fine. The back yard slopes away from the house already and doesnt get swampy even when the water is leaking. As for the first response, thanks but I thought a french drain just involed digging a trench and laying a perf pipe. Except for the back breaking digging, where does the $20,000 price tag come from. What I dont know are things like, how far to dig,what kind of pipe, what and how much gravel, do I tar the walls before backfilling, etc.... We just got flooded again last night so Im mopping again. Thanks for the help but please keep the instructions coming.

cellarwater

04:42PM | 09/18/04
Member Since: 12/09/03
178 lifetime posts
Sorry to read that you're under water again! Some peoples houses are getting washed away,right now! I feel bad for them. This hurricane season is devastating. O.K. quick drain lesson: 1st dig down to the footing,that is the level of the basement floor outside; 2nd put down 4inches 11/2 inch crushed stone 3rd lay 4inch swiss pipe 4th seal basement wall 5th pour the crushed rock right up to ground level.That's it. The pipe can go to the sump pump $20,000 is what a contractor will want for that job. I hope I have been of some help. C.

dadof5

05:19AM | 09/23/04
Member Since: 09/16/04
16 lifetime posts
"C" thanks for the input, greatly appreciated. Sorry to keep bugging, when you say dig to the footing and fill with 4 inches of gravel, does that mean I actually dig 4 inches below the basement floor so that when I add the gravel the drain pipe will be at the same level as the floor?. Second I was going to use the 4inch black flexible tubes with the slit holes all around as the pipe, is this appropriate. Finally, what product do you recomend to put on the block wall to help waterproof? Thanks in advance for the help. Bob

cellarwater

09:34AM | 09/23/04
Member Since: 12/09/03
178 lifetime posts
If you have a footing at the base of the wall dig along next to that. if the wall just stops, the floor of the trench will stop there also. Place the crushed rock along the wall 4 inches deep. Set the pipe holes down on that and fill with the crushed rock to the top. Use the straight white perforated pipe, the coiled stuff crushes easy, and it's difficult to hold a grade with it C.

dadof5

05:16PM | 09/29/04
Member Since: 09/16/04
16 lifetime posts
hey c. thanks for the tips I'll let you know how many blisters it takes to dig a drain.!!

cellarwater

05:05PM | 09/30/04
Member Since: 12/09/03
178 lifetime posts
Sure no problem. You're gonna have tough hands! One thing for safety. dig when the ground is dry. If you dig wet ground. Shore up the trench. It's a good idea wet or dry. People have lost their lives in cave ins. Good luck Have fun C.

dadof5

07:56AM | 10/13/04
Member Since: 09/16/04
16 lifetime posts
Hey 'c' if your still out there, (or anyone else with some knowledge) While digging for the french drain, i dug about a foot below the level of the basement floor ( still not at the footer yet0 when out of a gap between 2 cinder block water came pouing out like a hose. as I continued to dig along the house at that level another gap sprouted. All in all I found 3 sprouting areas. the third a block lower than the first two. It took probably 5 hours before they were done draining. Any Idea? My plan is to leave the gaps open to drain and put the bottom of my french drain pipe at the level of the drain areas of the block. Am I thinking correct?

I plan on back filling with gravel tomorrow(Oct 14th) thanks again for your help. bob
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