Home Page link

"R" for insulation????

Home| Search | About
Login Password
Register Now! Lost Password?

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Page 7 of 7       << first < 1 2 3 Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
"R" for insulation???? cece e. 07-11-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Jeff on July 12, 2006, 12:58 am
R is the fraction of heat loss compared to an air gap the same thickness.
So R-19 insulation will conduct 1/19 as much heat as an air gap the same
thickness. If you place two pieces of insulation on top of each other you
can add the R value. For example two 6" fiberglass bats (R-19 each) equals
R-38.


> My last question before I get started with insulating my crawl space.
> Remember this is my first time doing this. What does the "R" mean for
> insulation. I was going to insulated my crawl space with fiberglass
> insulation but a man from the big orange box told me that for a crawl
> space I could use (i forgot the exact name) styrofoam and glue it to the
> walls and it would have an R10 rating (or something like that). What did
> he mean and is styrofoam just as effective as insulation (in Colorado) for
> keeping the heat in?



Posted by Doug Boulter on July 12, 2006, 1:39 am
2006:

> I was going to insulated my crawl space
> with fiberglass insulation but a man from the big orange box
> told me that for a crawl space I could use (i forgot the exact
> name) styrofoam and glue it to the walls and it would have an
> R10 rating (or something like that). What did he mean and is
> styrofoam just as effective as insulation (in Colorado) for
> keeping the heat in?

We're talking two different strategies for insulating a crawl space
here, I believe. You intended to put fiberglas batts between the
floor joists, and he wants you to insulate the walls of the
crawlspace.

The difference is how the crawlspace functions. In your system, it
stays close to the temperature (and humidity) of the outside air.
You open the small vent windows in the summer and block them off in
the winter. In his system, the crawlspace is insulated space --
warmer in the winter and colder in the summer. The crawlspace
isn't ventilated at all in any season.

So it seems to me you and he are talking apples and oranges. Both
methods are routinely used these days. You might want to talk to
your local utility and get their recommendation for what works well
in your area -- and, if you seal the crawlspace, how to deal with
heating equipment in the crawlspace (needs an intake air duct for
combustion air).


--
Doug Boulter

To reply by e-mail, remove the obvious word from the e-mail address

Posted by zyberengel on July 12, 2006, 7:50 am
Have you tried Aluminium foil its cheaper and more practical
fire resistant and easier to install it is something you could buy from
a grocery store
R means retardant
cece e. wrote:
> My last question before I get started with insulating my crawl space.
> Remember this is my first time doing this. What does the "R" mean for
> insulation. I was going to insulated my crawl space with fiberglass
> insulation but a man from the big orange box told me that for a crawl
> space I could use (i forgot the exact name) styrofoam and glue it to the
> walls and it would have an R10 rating (or something like that). What did
> he mean and is styrofoam just as effective as insulation (in Colorado) for
> keeping the heat in?


Posted by Chris Lewis on July 12, 2006, 11:46 pm
> Have you tried Aluminium foil its cheaper and more practical
> fire resistant and easier to install it is something you could buy from
> a grocery store

And has _zero_ insulation value. Except inosofar as it may seal
air leaks. He's trying to insulate it, not improve its fire resistance.

> R means retardant

R is insulation factor. Not fire retarding rating.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.

Page 7 of 7       << first < 1 2 3
Similar ThreadsPosted
Alternatives to Frost King Insulation or Preferred Insulation for Door Frames, Etc February 4, 2007, 1:49 pm
Temporaire water into insulation could affect insulation and floor rafters? July 10, 2006, 11:03 am
Insulation question (greenboard in bathroom, kraft face insulation, etc.) June 3, 2008, 2:44 pm
Insulation on top of wool insulation July 27, 2007, 12:01 am
insulation August 21, 2005, 9:00 pm
Insulation October 30, 2005, 8:15 am
More insulation January 16, 2006, 1:03 pm
insulation August 12, 2006, 3:26 pm
Insulation September 22, 2006, 11:09 pm
insulation November 25, 2006, 10:53 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap