How To Increase R-value Of Wood Floor - Flooring - DIY Chatroom Home Improvement Forum


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

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

Reply
 
Thread Tools Display Modes
Old 03-24-2011, 03:40 PM   #1
Newbie
 
Join Date: Mar 2011
Posts: 1
Rewards Points: 10
Default

How to increase R-value of wood floor


I'm installing some 1/2 prefinished wood flooring over a plywood subfloor.
It's an old house without much crawl space and there is no insulation between joists. Maybe sometime in the future, I can solve that issue. Right now, I just want to optimize the R-value of this retrofit.

I can't add a lot of thickness, so I'm looking for something affordable, thin, and with a decent R-value in addition to the felt or tar paper as a vapor barrier. One idea was 6 mil plastic. I've seen this product rated with an R-value of .87. Doubling that would give 1.74. Not bad. The question is whether it really has that R-value. Maybe it does in an application where it traps a lot of air like a greenhouse, but would it under a floor?

1/4 cork sounds like a good idea but the R-value is only .236

Any ideas would be appreciated

Advertisement

ArkRetro is offline   Reply With Quote
Old 03-25-2011, 06:46 PM   #2
Member
 
Join Date: Mar 2011
Location: Columbus, OH
Posts: 33
Rewards Points: 25
Default

How to increase R-value of wood floor


The 1/4" cork is what I was going to recommend. I'm surprised the r-value is that low though. Using plastic beneath a wood floor isn't a great idea. There is a reason they make/sell/recommend/use a more expensive felt paper, rather than simply using 4 or 6 mil plastic. While the felt is a moisture barrier, it still allows the wood to breath. You'd probably never notice an issue with the plastic, but it's simply another layer that could cause an issue.

In the end, I think working on the floor side of things is way more trouble (cost) than it's worth for an outcome that will more than likely not be noticeable at all. Just install the floor over a felt paper and go down to the crawl space where you can make a real difference.

Advertisement

Mikef5000 is offline   Reply With Quote
Old 03-26-2011, 12:26 PM   #3
Member
 
Join Date: Jul 2009
Posts: 951
Rewards Points: 500
Default

How to increase R-value of wood floor


The only way six mil plastic has an R value of .8 is if it's stretched over a 1" airspace. It's the air that has the R value, not the plastic.

Wood has an R value of 1 per inch. So if you put down 3/4" subfloor and 3/4" hardwood, you'll get over R1 from that.

Then buy rigid foam (R 3.8) and tack it to the bottom of the subfloor. It will make a huge difference.
pyper is offline   Reply With Quote
Reply


Thread Tools
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
Laminate or vinyl on a concrete basement floor? pjpjpjpj Flooring 36 09-03-2012 02:37 PM
Wood floor on a tongue & groove subfloor. Huckleberry Flooring 4 05-10-2011 09:41 PM
need advise on refinishing a wood floor EPERRINGTON Flooring 2 03-13-2011 09:12 PM
Wood Floor in my new shed butlerguy1990 Flooring 3 08-07-2009 10:37 AM
Best subfloor and material thickness nugentcn Flooring 7 09-07-2008 01:48 PM




Top of Page | View New Posts