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Willie5566 04-18-2007 03:24 PM

Water proofing basement.
 
Does anyone know how to waterproof a basement. I am starting to get motivated to fix my basement. I know it will take some digging but I think it is doable. I am looking at digging 3-4 feet wide by 10-15 feet long by 4 feet deep. It can be done!! My question is what do I do once I dig it? Is there a sealant I can use on the outside walls? I am skepticle about only using drain tile. Please help with suggestions!!

concretemasonry 04-18-2007 05:02 PM

Assuming you have done everything obvious above ground like gutters, downspout extensions and grading away from the house, the only thing left is drain tile with drainage to "daylight" away from the house or to a sump pump.

The black "goop" on the outside of a wall does little good. It is really only a damp proofer.

You have the choice of putting the drain tile inside the wall or outside. Each has advantages. The tile must be at or below the bottom of the footings. Doing just one wall will help some, but will not be enough in the case of a major storm or a high water table.

Brik 04-19-2007 12:08 PM

I have a system like this
http://www.gmxco.com/system.html

My footing drain goes first to a drywell. The drywell have an overflow to daylight. I also have a second perimeter drain to support the downspouts . This is piped with solid pipe to the drywell in addition to the perforated footing pipe. Thats my exterior system.

Interior I also have a perimeter french drain that leads to a sump pump. The sump pump pumps to the drywell as well.

All of the above was put in when the house was being built.

You are taking the right approach. Work from the outside in when making your basement dry.

Willie5566 04-24-2007 05:48 PM

Quote:

Originally Posted by concretemasonry (Post 41488)
Assuming you have done everything obvious above ground like gutters, downspout extensions and grading away from the house, the only thing left is drain tile with drainage to "daylight" away from the house or to a sump pump.

The black "goop" on the outside of a wall does little good. It is really only a damp proofer.

You have the choice of putting the drain tile inside the wall or outside. Each has advantages. The tile must be at or below the bottom of the footings. Doing just one wall will help some, but will not be enough in the case of a major storm or a high water table.

Downspouts are fine. I do not want to grade away from the house if I am going to end up digging it all out so I can put in drain tile or the like.

I have one corner that leakes and I would like to eliminate it. I am open to suggestions on how I should best acheive this.

Willie5566 04-24-2007 05:49 PM

Quote:

Originally Posted by Brik (Post 41590)
I have a system like this
http://www.gmxco.com/system.html

My footing drain goes first to a drywell. The drywell have an overflow to daylight. I also have a second perimeter drain to support the downspouts . This is piped with solid pipe to the drywell in addition to the perforated footing pipe. Thats my exterior system.

Interior I also have a perimeter french drain that leads to a sump pump. The sump pump pumps to the drywell as well.

All of the above was put in when the house was being built.

You are taking the right approach. Work from the outside in when making your basement dry.

Did you do this yourself or did the builder install it?

Is it expensive?

Brik 04-24-2007 06:13 PM

Builder did it when house was being built. The gmxco was a modest up charge. I do not remember how much. Not too much, under $3K for sure. $1800 is sticking in my head. The rest was standard in the 'package' price of the house.

Full disclosure here. My drywell is only a 12' deep hole in the ground filled with crushed stone as far as I know (I didn't see it going in). It will likely be useless in a few years because of soil infiltration and I will need to exclusively rely on the daylight overflow (which is fine).

A better dry well would be something with a tank with no bottom sitting on a couple of foot of gravel. Quite frankly I'm not sure if I have that or not. All I know is its 12' deep.

brownie 04-27-2007 05:31 PM

Quote:

Originally Posted by Willie5566 (Post 41472)
Does anyone know how to waterproof a basement. I am starting to get motivated to fix my basement. I know it will take some digging but I think it is doable. I am looking at digging 3-4 feet wide by 10-15 feet long by 4 feet deep. It can be done!! My question is what do I do once I dig it? Is there a sealant I can use on the outside walls? I am skepticle about only using drain tile. Please help with suggestions!!

When you get the hole dug, let the wall dry. Then broom it off real well. Apply cold tar then put visqueen (Plastic) over the tar. The plastic will stick to tar, smooth all the air out. Run the plastic from just above ground level down and over the lip where the wall meets the footing. Make sure your footing drain has enough pea gravel on it.

Willie5566 04-27-2007 10:36 PM

Quote:

Originally Posted by brownie (Post 42586)
When you get the hole dug, let the wall dry. Then broom it off real well. Apply cold tar then put visqueen (Plastic) over the tar. The plastic will stick to tar, smooth all the air out. Run the plastic from just above ground level down and over the lip where the wall meets the footing. Make sure your footing drain has enough pea gravel on it.

Should I use drainage tile still?

brownie 05-03-2007 12:46 PM

Quote:

Originally Posted by Willie5566 (Post 42628)
Should I use drainage tile still?

YES:Drain to a sump, then to your yard away from your house, a ditch, storm sewer.


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