Re: building block wall

Posted by Billy NY on April 27, 2007 at 12:41:51 from (64.12.116.14):

In Reply to: Re: building block wall posted by Bryan in Iowa on April 27, 2007 at 10:29:20:

Preferrably outside of wall, use corrugated/ perforated foundation drainpipe, on top of footing where footing meets the wall. Pipe is covered with coarse stone, like #2 crushed, place filter fabric over the top of stone to keep fines from settling in and choking up the voids. Footing will be level, but if you can set the foundation drain pipe on a slight pitch to one end that is low, that is ok, think most are set level. You then use a Tee to send out a lateral to where you want it to drain. The foundation drain loop will fill and drain to the lateral which would be set at the lowest elevation for good drainage. You can use coarse stone to bed one side a little higher for pitch but even if level, as long as it's got a place to run to, should be fine to divert the water out. If you are boxed in, you could run the lateral to a sump pit in the basement, use a sump pump, but preferrably, you want that pipe (solid for lateral, not perforated) to penetrate the walls and drain by gravity away from the building to a drywell or daylight to where it can run off. Plan this out and put sleeves where you want to drain to, so you can run a pipe through, wall or footing if necessary so you don't have to chop it out later.

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