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:

Windows 10 announced, as well as developer preview
Created by macuser, last reply by Disrespective on 1-Oct-2014 15:57 (33 replies)
Pages... 2 3


Moment of Truth?
Created by BarTender, last reply by JimmyC on 29-Sep-2014 09:16 (441 replies)
Pages... 28 29 30


Can i have 2 ISP's at home?
Created by ReckITT, last reply by Lazarui on 30-Sep-2014 18:15 (49 replies)
Pages... 2 3 4


Why is your nickname what it is, what are the origins of it?
Created by Presso, last reply by hsvhel on 1-Oct-2014 11:52 (89 replies)
Pages... 4 5 6


What time will the Apple Store online be selling the iPhone 6?
Created by scotiwis, last reply by YoginiCat on 1-Oct-2014 17:08 (97 replies)
Pages... 5 6 7


iPhone 6 From Spark - Order Dates and Pricing?
Created by Otagolad, last reply by mahdibassam on 1-Oct-2014 17:03 (348 replies)
Pages... 22 23 24


Easiest way to have iPhone warranty service
Created by JoshWright, last reply by nitrotech on 30-Sep-2014 21:37 (15 replies)

Passwords and pesky teenagers
Created by martyyn, last reply by DaveDog on 1-Oct-2014 12:28 (26 replies)
Pages... 2



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.