Home Page link

can I put fiberglass insulation over rock wool?

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

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

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
can I put fiberglass insulation over rock wool? Joe 08-22-2008
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Joe on August 22, 2008, 9:06 pm


The rock wool is contained in a plastic barrier - if I put the
fiberglass over it do I need a vapor barrier or should I put the wool
right over it?

Special 468x60
Posted by Don Young on August 22, 2008, 9:40 pm



> The rock wool is contained in a plastic barrier - if I put the
> fiberglass over it do I need a vapor barrier or should I put the wool
> right over it?
Never have more than one vapor barrier or you will eventually get moisture
trapped between them since barriers are not 100% effective.

Don Young



Posted by Joe on August 22, 2008, 9:58 pm


>
rock wool is contained in a plastic barrier - if I put the
> > fiberglass over it do I need a vapor barrier or should I put the wool
> > right over it?
>
> Never have more than one vapor barrier or you will eventually get moisture
> trapped between them since barriers are not 100% effective.
>
> Don Young

so does that mean I cannot put fiberglass over the rock wool since
it's encased in plastic? Do I need to rip it down? This is in a Cape
Cod so the insulation is hanging from the gables. I'm just concerned
that 3" of rock wool is not an efficient amount of insulation.

Posted by on August 23, 2008, 11:04 am


>
>
.> The rock wool is contained in a plastic barrier - if I put the
> > > fiberglass over it do I need a vapor barrier or should I put the wool
> > > right over it?
>
> > Never have more than one vapor barrier or you will eventually get moist=
ure
> > trapped between them since barriers are not 100% effective.
>
> > Don Young
>
> so does that mean I cannot put fiberglass over the rock wool since
> it's encased in plastic? Do I need to rip it down? =A0This is in a Cape
> Cod so the insulation is hanging from the gables. I'm just concerned
> that 3" of rock wool is not an efficient amount of insulation.

Just cutting slits will take care of it, remember slit both the top
and the bottom.

Posted by Joe on August 25, 2008, 10:14 am


On Aug 23, 11:04 am, jmee...@columbus.rr.com wrote:
>
>
>
>
>
The rock wool is contained in a plastic barrier - if I put the
> > > > fiberglass over it do I need a vapor barrier or should I put the wool
> > > > right over it?
>
> > > Never have more than one vapor barrier or you will eventually get moisture
> > > trapped between them since barriers are not 100% effective.
>
> > > Don Young
>
> > so does that mean I cannot put fiberglass over the rock wool since
> > it's encased in plastic? Do I need to rip it down? This is in a Cape
> > Cod so the insulation is hanging from the gables. I'm just concerned
> > that 3" of rock wool is not an efficient amount of insulation.
>
> Just cutting slits will take care of it, remember slit both the top
> and the bottom.

slits at the top and the bottom are good enough to release the vapor?
There are staples in the middle as well, should i put slits there too?

Similar ThreadsPosted
insulation - rock wool? any asbestos? March 13, 2006, 11:20 am
insulation - rock wool? any asbestos? March 13, 2006, 11:42 am
rock wool insulation in attic replace or add to it? June 30, 2008, 3:00 pm
Insulation on top of wool insulation July 27, 2007, 12:01 am
Covering fiberglass insulation? September 24, 2006, 11:43 am
wrapped fiberglass insulation October 23, 2008, 5:09 pm
Re: wrapped fiberglass insulation October 24, 2008, 2:51 pm
cellulose vs. fiberglass blowin insulation? December 7, 2005, 12:33 pm
Upgrading insulation with Blown-in cellulose or fiberglass October 10, 2005, 6:30 pm
Adding insulation to attic - fiberglass or cellulose? February 27, 2006, 2:06 pm

Contact Us | Privacy Policy

XML SitemapXML Sitemap