Framing Basement Walls that have a French Drain

Ask your questions pertaining to the interior that don't fit in the above categories
Post Reply
BernieC
Posts: 2
Joined: Thu Aug 17, 2017 8:01 pm

Framing Basement Walls that have a French Drain

Post by BernieC » Thu Aug 17, 2017 8:17 pm

Hi, My basement has been waterproofed with a french drain and sump pump. Nailing into the concrete...into the french drain voids the warranty. How can I install the bottom plate without nailing into the concrete?

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Thu Aug 17, 2017 9:22 pm

You could use a construction adhesive . If you do that it will take overnight to be secure.
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

DanM
Posts: 292
Joined: Mon Aug 07, 2017 6:39 am

Re: Framing Basement Walls that have a French Drain

Post by DanM » Fri Aug 18, 2017 4:58 am

I would also throw in some L blocks after your walls are framed to give the bottom some extra support from moving in or out over time. Take a pair of 12" (ish, doesn't have to be precise) 2x4's or 2x6's and nail them together to form an L. Nail one part of the L to the foundation wall a few inches up from the floor, then nail the other part of the L to a wall stud. I'd put an L block at the corner of each wall and every 6-8ft in between.

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Fri Aug 18, 2017 7:39 am

Good idea DanM. This will give some extra strength incase the adhesive loosened up over time and with moisture.
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

BernieC
Posts: 2
Joined: Thu Aug 17, 2017 8:01 pm

Re: Framing Basement Walls that have a French Drain

Post by BernieC » Sat Aug 19, 2017 5:24 pm

Thank you!

Grimster14
Posts: 2
Joined: Sat Mar 16, 2019 3:34 am

Re: Framing Basement Walls that have a French Drain

Post by Grimster14 » Sat Mar 16, 2019 3:41 am

Hello, when you have an interior perimeter French drain, do you recommend placing your subfloor first and framing your walls on top of the 3/4 osb or framing walls first using adhesive? Concerned about drilling into the thin concrete over the drain. Also, using dmx under the osb, and if you use adhesive for the pt treated base plate, wouldn’t that hinder future drainage to the drain from the floor?
Thanks

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Sat Mar 16, 2019 8:14 am

If you are using sub floor you could install it first.
Generally speaking a french drain is not for draining flooding from the interior of the home it is designed for draining moisture that comes through the basement walls at the perimeter of the basement and under the footings.
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

Grimster14
Posts: 2
Joined: Sat Mar 16, 2019 3:34 am

Re: Framing Basement Walls that have a French Drain

Post by Grimster14 » Sat Mar 16, 2019 9:08 am

Thank you Shannon. I guess I was focused on walls first but subfloor first makes sense in this situation.

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Sat Mar 16, 2019 3:47 pm

Normally I would frame first but this will help your situation with the drain
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

NSADIYER
Posts: 3
Joined: Mon Mar 18, 2019 7:16 pm

Re: Framing Basement Walls that have a French Drain

Post by NSADIYER » Mon Mar 18, 2019 7:33 pm

I have a 1.5 inch gap between my block wall and basement slab around the basement perimeter. The basement has no sump pit. The channel is 3-4 inches deep and half filled with sand (soil in the area is sand). Is this a floating slab, or a French drain? Can I vacuum out the debri and attach 2 inch XPS to the block wall, then frame my interior wall in front of that? The basement is dry, but any moisture from the block walls should still migrate to the existing channel?

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Mon Mar 18, 2019 8:59 pm

NSADIYER wrote:
Mon Mar 18, 2019 7:33 pm
I have a 1.5 inch gap between my block wall and basement slab around the basement perimeter. The basement has no sump pit. The channel is 3-4 inches deep and half filled with sand (soil in the area is sand). Is this a floating slab, or a French drain? Can I vacuum out the debri and attach 2 inch XPS to the block wall, then frame my interior wall in front of that? The basement is dry, but any moisture from the block walls should still migrate to the existing channel?
Hmm does not sound like a french drain if it is soil filled? Usually crushed rock and a fabric filter. Do you have picture you could post?
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

NSADIYER
Posts: 3
Joined: Mon Mar 18, 2019 7:16 pm

Re: Framing Basement Walls that have a French Drain

Post by NSADIYER » Tue Mar 19, 2019 7:13 am

Thank you for your time Shannon; attached are some photos. I vacuumed out a few sections to get a better look, one photo is the reflection from a mirror that I set in the channel. The house was built in 1985, very sandy soil. There was a 2x4 wall framed in front of the channel that I removed so I could get access to the band joist, for insulation and sealing. The previous bottom plate was not pressure treated and was getting punky. I would like to insulate the walls with 2” XPS which would span the channel but not fill it. I poured some water into the channel and it did drain under the slab to the interior. I also do not see any weep holes at the bottom of the block wall. Doesn’t look like what I would expect for a French drain, but I don’t know what else it would be for. Thanks again.
Attachments
85716B3B-9DD5-4DC9-8CCC-831EC64D1AEE.jpeg
85716B3B-9DD5-4DC9-8CCC-831EC64D1AEE.jpeg (2.39 MiB) Viewed 135 times
A5A984BC-3FF5-4B70-9416-7F43C8164275.jpeg
A5A984BC-3FF5-4B70-9416-7F43C8164275.jpeg (2.55 MiB) Viewed 135 times
B8E92424-17C8-4CE1-A8BB-CFC6927FD5FB.jpeg
B8E92424-17C8-4CE1-A8BB-CFC6927FD5FB.jpeg (1.92 MiB) Viewed 135 times
B989DFD4-6F33-48BD-9000-3FE53EEE3549.jpeg
B989DFD4-6F33-48BD-9000-3FE53EEE3549.jpeg (1.38 MiB) Viewed 135 times

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Tue Mar 19, 2019 7:17 am

It is like no french drain I have ever seen but I suppose if your soil is that sandy any moisture would just soak away once down there.
Go ahead with your insulating plan as long as moisture can still run down it will function.
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

NSADIYER
Posts: 3
Joined: Mon Mar 18, 2019 7:16 pm

Re: Framing Basement Walls that have a French Drain

Post by NSADIYER » Tue Mar 19, 2019 10:17 am

Thanks again. Love the site and your YouTube content, very helpful.

User avatar
Shannon
Posts: 12548
Joined: Fri Nov 25, 2011 11:58 pm
Location: Canada
Contact:

Re: Framing Basement Walls that have a French Drain

Post by Shannon » Tue Mar 19, 2019 6:23 pm

Glad to help! Thanks for coming here
If you've found our videos or website information helpful, please considering making a donation using PayPal or pledging us on Patreon

Post Reply