Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Remodeling

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-10-2012, 01:26 PM   #1
Newbie
 
Join Date: Nov 2012
Posts: 3
Rewards Points: 10
Default

Proper Insulation/Membrane for basement walls.floor


Hello everyone! I'm looking for some advice on my basement remodel as I seem to have a situation I haven't been able to find an answer for.

Some background:
The house was built in the mid 60's and I have been living in it for 3 years now. It seems at some point there was water 'issues' in the basement that have been professionally addressed with a retrofit french drain and some outdoor measures as well. Since I have lived here, there has been no bulk water problems at all. The basement will however get pretty humid in the summer & we have used a de-humidifier.

Goals:
I'd like to remodel about 80% of the ~800sq ft space into living space and would like to mitigate any possible chances for water/mold. Reading through the forums and the building sciences website I think I have a decent plan, but I don't feel right about one issue i'm having with the french drain retrofit. There is a membrane associated with the french drain protruding a few inches from the poured concrete floor around the perimeter of the entire basement:



Here is a cross-section of how I plan on dealing with it:



So I was wondering what everyone's thoughts were about using the 6 mil poly to bridge the membrane gap under the bottom plate of the perimeter walls? There will be an air gap that i don't think I will ever be able to avoid because of the existing membrane!

Thoughts?

NovaBiele is offline   Reply With Quote
Old 11-19-2012, 02:34 PM   #2
Newbie
 
Join Date: Nov 2012
Posts: 3
Rewards Points: 10
Default

Proper Insulation/Membrane for basement walls.floor


Anyone have any comments?

I'm getting ready to start ordering materials after the holiday, and would really appreciate some feedback.

I'm a bit concerned about that air gap around the existing membrane.

Also, The Delta-FL installation directions do not mention any XPS. I'd like to avoid using it (height clearance issues) but if it is at the expense of a very cold floor do to poor insulation I'd reconsider. My finished flooring will be some form of synthetic carpeting (over 5/8 OSB over Delta-FL).

I'v also decided to use a sill foam insulation between the poly & bottom plate 'just in case' water penetrates it will not wick up.

Thanks

NovaBiele is offline   Reply With Quote
Old 11-19-2012, 03:05 PM   #3
Member
 
Join Date: Oct 2009
Location: Minneapolis, MN
Posts: 501
Rewards Points: 502
Default

Proper Insulation/Membrane for basement walls.floor


Do you have water issues or a cold concrete floor? I am in the middle of finishing of my basement and am not doing anything besides carpeting the floor. All my landscaping has been dealt with and I have no water issues.

Also, I went with 1" XPS. I monitored the humidity levels over this past summer and was not or the 40-50 % humidity so the smaller sheet was not an issue. Obviously 2" would be better, but for $$$ and space constraint I went with 1".

B
Beepster is offline   Reply With Quote
Old 11-19-2012, 03:54 PM   #4
Newbie
 
Join Date: Nov 2012
Posts: 3
Rewards Points: 10
Default

Proper Insulation/Membrane for basement walls.floor


There hasn't been any water issues since i've owned it. We've had some pretty bad rains...the kind where there is standing water in my shaded back yard for a few days and the basement has stayed dry and I have never noticed the sump pump running. I did need to move the sump piping at one point and it was full of water, so it must have been running at one point.

The basement does get very humid in the summer. We run a dehumidifier with a 50% duty cycle to keep it bearable.

The floor gets pretty cold in the winter, I've walked on it barefoot no problem, but my wife cant stand to. I feel like the DeltaFL air gap + OSB + padding + carpet would be enough but was just totally guessing at this.
NovaBiele is offline   Reply With Quote
Old 11-19-2012, 08:10 PM   #5
Member
 
Trucon01's Avatar
 
Join Date: Jan 2012
Location: Northern Virginia
Posts: 655
Rewards Points: 500
Default

Proper Insulation/Membrane for basement walls.floor


Off topic question... Where can I get that black dimple / drainage board? I've only seen online where I can buy it in bulk when I only need about 30ft or so...
__________________
Basement Demo started Jan 2012: View my basement progression!!!

Bathroom demo started Feb 2013: View my bathroom progression!!!
Trucon01 is offline   Reply With Quote
Old 11-19-2012, 08:53 PM   #6
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 14,294
Rewards Points: 2,250
Default

Proper Insulation/Membrane for basement walls.floor


Insulate & air seal your Rim & sill spaces. Also if the windows are original, replacing them will also help with the hot & humidity. Do you have any ducting feeding that space now, to help & heat & cool?

__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is online now   Reply With Quote
Reply

Tags
basement, french drain, insulation xps, remodel, vapor barrier


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Proper way to install chimney pipe in metal building roof jonblack Building & Construction 15 01-31-2012 10:50 AM
Proper drain and vent help needed papisox Plumbing 17 11-03-2010 08:52 AM
proper way to terminal romex entering drywall Red Squirrel Electrical 10 03-03-2010 12:43 PM
Help! What is Proper Way to Install Manufactured Stone? EricW Building & Construction 3 01-07-2007 03:56 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.