Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 
29 posts

Geek


  Reply # 746550 17-Jan-2013 19:56 Send private message

FWIW, it's a myth that compressing insulation decreases its per unit depth R-value. It would do so if, in the act of compression, a gap or air gap is created. Standard insulation will gain (per unit depth) R value up to almost 50% compression. Cornings have a chart of compression values for their products.

If you go to BRANZ website http://www.branz.co.nz/cms_display.php?sn=167&st=1 and view the GUIDELINE for December 2012, you will see a note about insulation over specification, and the problems it can cause - Rediced R-value, difficulty in getting a tight fit to the framing, causing a bulge in the flexible wall underlay into a drained and ventilated cavity, and the popping of screws as the sheet adhesive is not properly compressed.

534 posts

Ultimate Geek
+1 received by user: 5


  Reply # 746564 17-Jan-2013 21:06 Send private message

I'm sure it's not a good idea but in the small percentage which gains most benefit ie 20% or less, those issues aren't relevant. The point is that the argument about compression was really about installation eg stuffing batts into a space when they've been incorrectly sized.

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:




News »

Trending now »
Hot discussions in our forums right now:

Is chorus going to deliberately slow adsl internet down
Created by rugrat, last reply by sbiddle on 24-Jul-2014 18:14 (37 replies)
Pages... 2 3


Geekzone giveaway: Thecus N2310 NAS
Created by freitasm, last reply by jevvv on 24-Jul-2014 17:16 (71 replies)
Pages... 3 4 5


MH 17 "shot down" all dead
Created by joker97, last reply by tdgeek on 24-Jul-2014 14:34 (202 replies)
Pages... 12 13 14


PB Computers experiences
Created by KiwiNZ, last reply by jlittle on 24-Jul-2014 16:59 (40 replies)
Pages... 2 3


Huge Fuss, didn't even make it a year.
Created by networkn, last reply by Glassboy on 22-Jul-2014 19:50 (121 replies)
Pages... 7 8 9


Is working in IT making you less manly?
Created by dotnetdev, last reply by Dynamic on 24-Jul-2014 16:02 (38 replies)
Pages... 2 3


Skinny's new aggressive ad campaign
Created by Yabanize, last reply by Yabanize on 22-Jul-2014 23:35 (52 replies)
Pages... 2 3 4


Giving notice
Created by IlDuce, last reply by kharris on 24-Jul-2014 17:36 (15 replies)


Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.