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Old 09-05-2008, 11:18 PM   #1
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vertical crack on pour foundation, water leaking


ok guys i couldn't find a good aswer already posted. i can see a crack in the foundation where water is leaking tru, i heard that the best way to fix this is to dig a hole and fix it from the oustside. so after i dig my hole lol, what is the best way and best material to patch this crack and do i have to do something to the inside crack.

thanks in advance.

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Old 09-06-2008, 01:24 AM   #2
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vertical crack on pour foundation, water leaking


You are right. The best possible way to fix a leaking crack is from the outside. You want to dig out the area of the crack all the way to the footer. There may be drain tile that runs on top of the footer against the foundation wall. You must be able to expose the wall from the draintile when you do any waterproofing or you will still have leaks as the drain tile fills with water and also has holes in it. Now what i use to waterproof the crack is a product called Miradri. Its like a peel and stick rubberized sheet of membrane. I would dry and clean the foundation wall a foot wide over the crack with a wire brush. Then i would prime the area with Miradri primer let it dry and aply the miradri membrane over the entire crack. I normally only do this to the dirt level and then use urathane caulking from the dirt line up to the siding.

As far as a homeowner being able to buy the products ive mentioned im not sure of. Whatever you use make sure it has elasticity. Ive seen to many homeowners try to use cement to patch a leaking crack only to have there repairs crack two weeks later. If its cracked its gonna move; let it move.

As far as the inside it would be just for looks. you could do a uratheane epoxy injection but by the time you have bought all the equipment and tools to do all of this it would have been cheaper to have it done by a pro. I charge $50 a linear foot to fix cracks. If its an 8 foot crack it would cost you $400 for me to fix. you're going to spend nearly $300 in material and tools.


Last edited by KC Brick Layer; 09-06-2008 at 01:30 AM.
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Old 09-06-2008, 02:37 AM   #3
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vertical crack on pour foundation, water leaking


i heard of guys talk about injecting some sort of material which i don't know what it is, into the crack, is that the urathane caulking? or the miradri membrane? now the crack i see from the inside goes right to the bottom of the wall. so i guess it would go to the bottom from the other side right? now i didn't know there were some kind of drain tile on the footing of the foundation, do all the foundations have this. another thing do u apply the urathane caulking like cement or injected and how do u actually injected, do u use a caulking gun or do u have to use an air pump to push it in.
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Old 09-06-2008, 02:55 AM   #4
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vertical crack on pour foundation, water leaking


if your house was built in the past 30 years it most likely has drain tile. If you want to fix the crack from the inside you would need to by an epoxy injection gun. its kinda like a caulking gun but it has two plungers on it and has more pressure than a regular caulking gun. The urathane epoxy comes in a double tubed cartridge. it has a tip that mixes the two parts as its trigered. you would have to place injection ports on the crack every foot and use an epoxy to seal the crack and the porks in place. once the epoxy is hard you would start at the lowest port and start injecting till you see the material come out of the port above the one your pumping into. then you move to that one and work your way up.
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Old 09-06-2008, 03:16 AM   #5
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http://www.thisoldhouse.com/toh/arti...4997-2,00.html

here you go
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Old 09-06-2008, 07:15 AM   #6
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vertical crack on pour foundation, water leaking


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Originally Posted by KC Brick Layer View Post
if your house was built in the past 30 years it most likely has drain tile. If you want to fix the crack from the inside you would need to by an epoxy injection gun. its kinda like a caulking gun but it has two plungers on it and has more pressure than a regular caulking gun. The urathane epoxy comes in a double tubed cartridge. it has a tip that mixes the two parts as its trigered. you would have to place injection ports on the crack every foot and use an epoxy to seal the crack and the porks in place. once the epoxy is hard you would start at the lowest port and start injecting till you see the material come out of the port above the one your pumping into. then you move to that one and work your way up.
capping the lower port with the supplied cap so the sealer does not leak out.as you travel up the wall.
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Old 09-07-2008, 07:36 AM   #7
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vertical crack on pour foundation, water leaking


hopefully you can score some hydrophyllic polyurethane injectible mtl in 1 gal unit rather'n 5,,, instead of dragging out injection machine, for small jobs we just buy a grease gun, load it w/poly, inject away,,, 300psi's easy to achieve,,, i like to drill & use bang ports,,, 1st inject wtr to clean crks dust/crap/junk/mud/dead bugs,,, inject mtl from the btm UP,,, screw in next level male grease fitting when you get the right ooze capping's another way of doing it but male grease fittings're easier + you can reinject if needed.
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Old 09-07-2008, 09:07 AM   #8
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vertical crack on pour foundation, water leaking


i know our contractor suplies store only sales 202 urethane grout in 5's. But being that he's a home owner i would just recomend the tubes that mix in the tip. yesitsconcrete, he would have to buy a large hammer drill, bit, tap in ports with zerts, and a grease gun, plus way more material than he would use in a lifetime. not to mention that its nearly $100 a gal. Not really an option for a diy'er. Just use the product in this link http://www.polygem.com/constrct/polyfoam.php

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Old 09-08-2008, 03:48 PM   #9
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vertical crack on pour foundation, water leaking


well guys that is all good information, the last link from bricklayer says something about just using a regular caulking gun or an air one, but don't have the air one. i went to see how much to rent a jack hammer for a day, since i don't want to buy one not a lot of use for it. it is $32, maybe i'll just rent a slege hammer and go crazy. now i just have to go an check the stores to see if i can find what i need.
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Old 09-08-2008, 06:53 PM   #10
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vertical crack on pour foundation, water leaking


im assuming when you say "jack hammer" you mean a hammer drill. but you dont need them with the kit i mentioned. the ports epoxy over the cracks. no need to drill.
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Old 09-08-2008, 07:01 PM   #11
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i meant use a jack hammer to break the drive way(ashphalt)
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Old 09-08-2008, 07:54 PM   #12
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vertical crack on pour foundation, water leaking


miradrain's a dimpled pvc sheet/roll if i recall correctly,,, some guys use it outside but we used to direct leaking wtr over the footer into a sub-floor pipe system.

for my house, comparing work ease, i'd be injecting but i've done this work for 30yrs, too,,, makes a difference - not always is exterior the best bang for the buck,,, i do know what a pita it is repairing blacktop driveway's UNLESS you can get your hands on a paver &/OR HOT TOP.

your home - follow whoever's advice you wish.
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Old 09-16-2008, 12:25 PM   #13
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vertical crack on pour foundation, water leaking


ok i think i like the link that bricklayer posted the steps seem pretty easy to follow and i already have a caulking gun, now for the nails like it says on the "this oldhouse site" (tap 3-in.(1od)finishing nails partway into the crack) are these special nails or just regular nails? another question i my buddy gave me this "waterproof rubber membrane blue seal" stuff it says it is a one-step, liquid foundation waterprofer. and i could just apply it with a trowel, it don't mention anything about injecting it into the crack just apply it over the crack i guess. have u heard of anything like this and how good is it.
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Old 09-16-2008, 12:37 PM   #14
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vertical crack on pour foundation, water leaking


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Originally Posted by baseballfan View Post
ok i think i like the link that bricklayer posted the steps seem pretty easy to follow and i already have a caulking gun, now for the nails like it says on the "this oldhouse site" (tap 3-in.(1od)finishing nails partway into the crack) are these special nails or just regular nails? another question i my buddy gave me this "waterproof rubber membrane blue seal" stuff it says it is a one-step, liquid foundation waterprofer. and i could just apply it with a trowel, it don't mention anything about injecting it into the crack just apply it over the crack i guess. have u heard of anything like this and how good is it.
What's going on with the grading on the outside wall where the crack is located? What is your water source?
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Old 09-16-2008, 12:54 PM   #15
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vertical crack on pour foundation, water leaking


the crack is located right at the mid side of the house just below where the door is.
what u mean with grading on the outside and the water source is just when it rains and after winter when snow is melting.

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