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Old 09-14-2011, 09:36 PM   #1
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French Drains


I have no footings on my house how can I install a french drain if I have no footings. If I move approximately 2 feet away from the wall would that solve the problem?

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Old 09-15-2011, 06:36 AM   #2
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French Drains


French drain (perimeter drain) installation has nothing to do with whether you have footings or not. What you are looking for is most likely a perimeter drain, which can be installed around the perimeter of the house regardless of foundation type. Your description was vague, but before you supply more details, I suggest you search this forum for "perimeter drain" and "French drain" to see the dozens, probably hundreds, of posts that relate to design and installation. Then if you still have questions, post away.

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Old 09-15-2011, 01:20 PM   #3
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French Drains


With no footings the maximum you can dig down next to the foundation is the bottom of the foundation itself.

On top of this you would put down some porous fabric, then a layer of gravel, then the perforated pipe.

If you dig the trench for the drain pipe a little away from the foundation you can dig a little lower, namely you can disturb the soil no lower than on a 1:3 slope down and away. Example: fully 12 inches away (not on centers) from the foundation the trench bottom can be 4 inches below the bottom surface of the foundation.
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Old 09-15-2011, 01:24 PM   #4
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French Drains


With no footings the maximum you can dig down next to the foundation is the bottom of the foundation itself.

On top of this you would put down some porous fabric, then a layer of gravel, then the perforated pipe.

If you dig the trench for the drain pipe a little away from the foundation you can dig a little lower, namely you can disturb the soil no lower than on a 1:3 slope down and away. Example: fully 12 inches away (not on centers) from the foundation the trench bottom can be 4 inches below the bottom surface of the foundation. Eighteen inches away from the wall is probably the most you should go to achieve proper desaturation of the soil at the foundation once the drain system is in and working.
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