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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-13-2012, 09:49 AM   #1
Member
 
Join Date: Jun 2011
Posts: 33
Rewards Points: 25
Default

Blown In Cellulose Contacting Concrete


Hello,

I have a 'hallway' (About 3 x 10), that is actually a projection of the floor beams over the concrete garage slab. The hallway is very cold in the winter, and I recently found out that although the wally have R-13, and I have 2 layers of R-13 fiberglass at 90 degree angles in the roof, the floor has no insulation underneath the subfloor.

I am planning on replacing the floating laminate floor with something nicer, and want to fix this at the same time. I would prefer not to remove the subfloor, and there is no other way to access this area.

I was thinking that I could drill 1" holes and dense pack cellulose in the bays, then plug the holes back up. I would use a polyurethane foam underlayment for the new floor and tape the seams.

The concrete slab has no moisture issues. We are on the top of a sandy hill, and dranage is not a problem. Is this something that I can do?

kaalapurushha is offline   Reply With Quote
Old 07-13-2012, 01:24 PM   #2
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 6,943
Rewards Points: 3,020
Default

Blown In Cellulose Contacting Concrete


You will need more than a 1" hole to push the cellulose but that would work.

Dense packing is not easy with the little blowers you get from Home Depot and may require a professional blower machine.

Windows on Wash is offline   Reply With Quote
Old 07-13-2012, 04:45 PM   #3
Member
 
Join Date: Dec 2008
Location: Fairbanks, AK
Posts: 1,847
Rewards Points: 1,000
Default

Blown In Cellulose Contacting Concrete


Although I am not excited about using foam, this may be a good application for it. Can you get someone to spray closed cell foam through the holes, or is that too iffy? (I'd hate to hear about your floor inching up a bit from the expanding foam. Hmmm. ???) I really don't know why, but I don't like the concept of cellulose against a slab. If I did that, I would make sure that the floor above was vapor open.
jklingel is offline   Reply With Quote
Old 07-14-2012, 11:35 AM   #4
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 6,943
Rewards Points: 3,020
Default

Blown In Cellulose Contacting Concrete


If he went with foam, they do have lower pressure spray foam (i.e. drip foam), but the aren't cheap.

You will be much cheaper just removing the sub-floor entirely and insulating the area with rigid/spray combination.
Windows on Wash is offline   Reply With Quote
Old 07-17-2012, 09:51 AM   #5
Member
 
Join Date: Jun 2011
Posts: 33
Rewards Points: 25
Default

Blown In Cellulose Contacting Concrete


Quote:
Originally Posted by Windows on Wash View Post
If he went with foam, they do have lower pressure spray foam (i.e. drip foam), but the aren't cheap.

You will be much cheaper just removing the sub-floor entirely and insulating the area with rigid/spray combination.

You mean using XPS and great stuff to seal the edges?

I was wary of removing the subfloor since I am not sure yet if it is nailed or screwed, and I am assuming that it may extend under the wall (There is a non load-bearing wall that makes a small closet.

I suppose I could just get a circular saw and make very straight cuts 6" or so from the wall?
kaalapurushha is offline   Reply With Quote
Old 07-18-2012, 10:50 AM   #6
Exterior Construction
 
Windows on Wash's Avatar
 
Join Date: Aug 2011
Location: Washington DC Metro Area (VA, MD, DC)
Posts: 6,943
Rewards Points: 3,020
Default

Blown In Cellulose Contacting Concrete


By the time that you remove parts of the floor and pay a SPF contractor to fill the area, you can probably do just as good a job by removing some of the subfloor and insulating the area.

Cut the subfloor a few inches from the wall as you mentioned and go that route.

Windows on Wash is offline   Reply With Quote
Reply


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
How to Calculate Store Bought Concrete Coverage by Bag Size Willie T How To Guides 9 11-29-2011 01:32 PM
Pull string through blown cellulose MLMIB Building & Construction 10 06-21-2011 09:29 AM
Laminate Flooring on Two Different Concrete Heights mrken Flooring 4 12-14-2010 02:56 PM
New Concrete Walkway along side of house braverichard Building & Construction 0 11-03-2010 12:12 PM
How To Install Rigid Foam Insulation on Concrete earthad1 Building & Construction 9 10-26-2010 10:49 AM




Top of Page | View New Posts

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