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Discussion Starter · #1 ·
I am a younger guy so perhaps there is some history here that I don't appreciate. I have a drainage contractor who says he always puts the drain tile on top the foundation slab where it meets the wall, so that it rests in that "L" that is formed.

Everything I understand about current codes says the drain should be flush with the slab (the top of the pipe must not be higher than the top of the slab.)

Did they used to place the tile on the slab in the past or where did this contractor learn that on top of the slab was the right place to put it?

This is not new construction (1946), so the foundation is masonry block.
 

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Curmudgeon
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11,706 Posts
Nomenclature.
When we pour the slab
(interior floor) to the top
of the first course of block,
placing the 4" tile on top
of the footing would put
the top of the tile
roughly at the bottom of the slab.
Or, 4" below finished floor level.
 

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General Contractor
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8,051 Posts
4" bellow the top of the footing. Covered with 4" min of clean stone and fabric (I usually cover drainage with stone to the top of the concrete floor)

You should go with this to DIY chartroom, this site is for professional contractors only.
 
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