09:51AM | 11/27/13
Just had a french drain installed for the basement and noticing some crazy stuff. Wanted to know if we are freaking out for no reason:

1. There is a wet spot on the base of a basement wall. It is, however, visible over the wallboard installed for the french drain. Shouldn't the weep holes drain the water into the drain so no patches appear above the wallboard?

2. The sump pit is bone dry but a hole in the basement floor for the sewer cleanout has water in it. The height of the water in the sewer cleanout appears to be close to where the french drain is. If the pitch of the drain were true, we should be seeing water in the sump pit?

Wanted to know if we are expecting too good an engineering job from these drains.

Duane, Moderator

11:30AM | 11/28/13
Member Since: 11/14/13
87 lifetime posts
Can you tell me about the drain further,?
1- was the drain installed around the perimeter on the inside or outside of the foundation.
2- if the sump pit was a monolithic or a precast/ made sump and sealed around the basement floor then you might not see water in it if the water is seeping up from the ground however; if the hole in basement floor for the sewer pipe, in most cases would not be sealed and would be open to the ground and could allow water to rise through that area.

Thank you,
Duane Cotton expert moderator America


03:07PM | 11/28/13
Thank you very much for your reply. To answer your questions:
1) The french drain runs around the perimeter of the basement only. There is no lateral drain.

2) The sewer clean-out is inside the basement within the french drain perimeter. You're absolutely correct that is it open to the ground. I see dirt around it and not cement. Should I pour concrete around it to seal out the water?
The sump pit is a plastic drum and it has a pitched perforated pipe set in gravel feeding it. I hope that answered the question. Apologies I am not familiar with the precast/monolithic sump terminology you used.


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