Foundation Footing Drain - SIP Building

Detail Caption:

The pipe keeps the foundation free of water, the gravel allows free drainage of water to the pipe, and the filter fabric keeps both the pipe and gravel clear of fine sediment.


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Sep 21, 2013 6:08 AM ET

Response to David Kennedy
by Martin Holladay

If it mattered very much which way the holes were oriented, there would be a lot of perforated pipe that didn't work very well. Fortunately, it doesn't really matter which way the holes are oriented. Far too much time is wasted debating this trivial issue.

The key element of this system is the filter fabric. If you remember the filter fabric (and I'm glad to see that this GBA detail shows it), everything is going to work.

Most perforated pipe has two rows of holes, and these rows are best oriented at 4:00 o'clock and 8:00 o'clock. But you know what? 2:00 o'clock and 10:00 o'clock work just fine.

The type of perforated pipe shown in the illustration has lots of holes. Orient it any way your prefer, and don't worry.

Sep 21, 2013 1:20 AM ET

Wrong direction on drain holes
by David Kennedy

Every other reference to footing drains calls for the holes to face down. ADS pipe specs it this way as well. This is a major miss and I'd recommend pulling this illustration or fixing it to avoid confusion

Jan 2, 2011 5:36 PM ET

Response to William Geary
by Martin Holladay

The type of perforated drain pipe shown in the illustration has holes around the entire circumference of the pipe.

Jan 2, 2011 4:58 PM ET

Wrong Drain Pipe
by William Geary

This detail should show perforated rigid drain line with the holes down.

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