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Kneewall on top of foundation?

06:49AM | 03/17/03

Member Since: 03/16/03
4 lifetime posts

Kneewall on top of foundation?

We're getting ready to build a house, and the contractor says he normally pours the basement with 8' walls. He then adds a 12" kneewall on top of the cement so there's room for the ductwork. This allows 8' or so clearance after a basement ceiling is put in.

How does this compare to just pouring cement to get the additional height? I understand using the kneewall is probably a cost-savings, but I don't want to compromise the structure of the house. Is this a common practice? Should I worry?

LDoyle

01:40PM | 03/17/03

Member Since: 06/03/01
327 lifetime posts

It is common practice to pour the cement only where needed. For example, on a sloped lot, some of the walls may be a full 8 ft while others may be only 4 or 6 ft with framing on top of that. Sounds like a good idea to me and will provide you with a real 8 ft ceiling.

caddy

07:26AM | 03/19/03

Member Since: 01/20/03
12 lifetime posts

Have you considered cmu foundation walls? This will eliminate the forms and two step operation. I would ask for a quote for both.