Home Page link

Insulation on top of wool insulation

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

Page 2 of 2       << first < 1 2 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
Insulation on top of wool insulation Eigenvector 07-27-2007
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by mm on July 28, 2007, 2:05 am
On Fri, 27 Jul 2007 16:48:10 -0700, "Eigenvector"

>
>> eigen,
>>
>> I can't think of any reason not to just roll out the fiberglass over the
>> "wool". Try to get fiberglass without a vapor barrier since the wool
>> should be lying on a vapor barrier already.
>>
>> Dave M.
>
>Well unfortunately there isn't a vapor barrier under the wool, just the
>sheetrock.

That was the situation in my house too. The first owner put in the
fiberglass. I assume that since there is both.
>
>Does wool even provide decent R values or what. I've heard rumors that it
>works relatively well - we're talking 4 to 5 inches of the stuff in the
>attic.

That's a lot more than I hda, but that in no way answers your
question.


Posted by Steve Barker on July 27, 2007, 10:23 am
just have cellulose blown on top. forget fiberglass.

www.centralfiber.com


--
Steve Barker







> My attic is insulated with wool. Not having any idea just how good that
> performs I had a mind to augment it with the pink stuff. But I'm
> wondering if I can just roll it on top of the wool, or should I remove the
> wool first. If I do, removing it will be a job I'd just as soon not do -
> I'd rather pay higher bills than do something like that. The other issue
> for me is that they covered up all the wires with the wool, so I don't
> have a clue where they are and that makes my job of re-wiring just a bit
> more difficult - as normally I would just clip the old stuff and run the
> new Romex through the hole left by the bad stuff as it dropped into the
> wall. But that adds a different question - in the attic, is wiring
> exposed/insulation cut around it like is done in a wall, or does the
> insulation cover it?
>



Posted by Bob M. on July 27, 2007, 9:07 pm

> just have cellulose blown on top. forget fiberglass.
>
> www.centralfiber.com
>
>
> --
> Steve Barker
>
>
>


except if the ceiling 'rock is 1/2", then fiberglass may be the better
option because it weighs less and is less likely to crack the 'rock. Yeah,
fiberglass isn't as good an insulation as cellulose, but the ceiling weight
issue is definitely something to consider.


Posted by Steve Barker on July 27, 2007, 10:29 pm
the stuff don't weigh any significant amount more.

--
Steve Barker







>
>> just have cellulose blown on top. forget fiberglass.
>>
>> www.centralfiber.com
>>
>>
>> --
>> Steve Barker
>>
>>
>>
>
>
> except if the ceiling 'rock is 1/2", then fiberglass may be the better
> option because it weighs less and is less likely to crack the 'rock.
> Yeah, fiberglass isn't as good an insulation as cellulose, but the ceiling
> weight issue is definitely something to consider.



Posted by Bob F on July 27, 2007, 10:41 pm

> My attic is insulated with wool. Not having any idea just how good that
> performs I had a mind to augment it with the pink stuff. But I'm wondering if
> I can just roll it on top of the wool, or should I remove the wool first. If I
> do, removing it will be a job I'd just as soon not do - I'd rather pay higher
> bills than do something like that. The other issue for me is that they
> covered up all the wires with the wool, so I don't have a clue where they are
> and that makes my job of re-wiring just a bit more difficult - as normally I
> would just clip the old stuff and run the new Romex through the hole left by
> the bad stuff as it dropped into the wall. But that adds a different
> question - in the attic, is wiring exposed/insulation cut around it like is
> done in a wall, or does the insulation cover it?
>

I just covered the blown-in insulation with unfaced fiberglas batts. The batts
are nice when you need to work up there, for wiring, etc, because you can move
them aside easily and then replace them.

Do not insulate knob and tube wiring, if that's what you have. I replaced all
that in my attic before insulating. It could be wirth investigating your wiring
before adding insulation.

Bob



Page 2 of 2       << first < 1 2
Similar ThreadsPosted
insulation - rock wool? any asbestos? March 13, 2006, 11:20 am
insulation - rock wool? any asbestos? March 13, 2006, 11:42 am
can I put fiberglass insulation over rock wool? August 22, 2008, 9:06 pm
rock wool insulation in attic replace or add to it? June 30, 2008, 3:00 pm
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 August 21, 2005, 9:00 pm
Insulation October 30, 2005, 8:15 am
More insulation January 16, 2006, 1:03 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap