Home Page link

detached garage insulation- vapor barrier needed?

Building Construction - Building Construction Industry Discussions. 

Page 1 of 2       1 2 > last >> 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
detached garage insulation- vapor barrier needed? beerguzzler50 08-10-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by on August 10, 2006, 10:27 am
I have a wood framed detached garage that I would like to insulate. I
only plan on heating it a few times a year when I have a project to do
or something I have to fix in winter (I live in upstate NY) with a
portable heater. The garage is wrapped on the outside with Tyvek over
the plywood and covered with vinyl siding. I plan on using r13
fiberglass insulation on the sides and r19 in the ceiling.

Is there any reason why I should use kraft faced in this situation? It
is more expensive and I have a vapor barrier already with the Tyvek
right? I will be covering the inside with 5/8 drywall on both walls
and ceiling.

Thanks.


Posted by Joseph Meehan on August 10, 2006, 2:30 pm
beerguzzler50@yahoo.com wrote:
> I have a wood framed detached garage that I would like to insulate. I
> only plan on heating it a few times a year when I have a project to do
> or something I have to fix in winter (I live in upstate NY) with a
> portable heater. The garage is wrapped on the outside with Tyvek over
> the plywood and covered with vinyl siding. I plan on using r13
> fiberglass insulation on the sides and r19 in the ceiling.
>
> Is there any reason why I should use kraft faced in this situation?
> It is more expensive and I have a vapor barrier already with the Tyvek
> right? I will be covering the inside with 5/8 drywall on both walls
> and ceiling.
>
> Thanks.

I doubt if I would use a vapor barrier under those circumstances.

--
Joseph Meehan

Dia duit



Posted by Bob Morrison on August 10, 2006, 3:33 pm
In a previous post beerguzzler50@yahoo.com wrote...
> Is there any reason why I should use kraft faced in this situation? It
> is more expensive and I have a vapor barrier already with the Tyvek
> right? I will be covering the inside with 5/8 drywall on both walls
> and ceiling.
>

Yes you should because the vapor barrier should always be installed on the
warm side of the wall. The Tyvek is intended to keep rainwater from
getting to the sheathing. It also has the advantage of letting out any
moisture that may get through the interior vapor barrier.

The cost of kraft face insulation isn't that much more than unfaced
insulation and for the average DIY'er it install much easier.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by on August 10, 2006, 10:12 pm
yea

tyvek keeps water out and lets vapor through
from what i understand

but you dont want bare insulation in a garage where
you are doing projects

just think of how nasty its gonna get with sawdust
or body filler dust getting in the fiberglass

There is something called Tileboard its like pegboard
material cant think of it right now but it comes in many
styles and is supose to be used in bathrooms although
i would never use it there.

its not real cheap but it would make your garage much
more liveable and not cost so much

OR

lots of times you can goto a home depot or Lowes and
they will have drywall that has been dammaged on the edges
by some fool that cant drive a forklift
you could pick that up for $2-3 a sheet and mud the heck
out of it

its kinda hit or miss that there will be any there when you
need it so you might endup doing half a wall every couple
months until you get it done.


bob marencin
www.yourepair.com


> In a previous post beerguzzler50@yahoo.com wrote...
>> Is there any reason why I should use kraft faced in this situation? It
>> is more expensive and I have a vapor barrier already with the Tyvek
>> right? I will be covering the inside with 5/8 drywall on both walls
>> and ceiling.
>>
>
> Yes you should because the vapor barrier should always be installed on the
> warm side of the wall. The Tyvek is intended to keep rainwater from
> getting to the sheathing. It also has the advantage of letting out any
> moisture that may get through the interior vapor barrier.
>
> The cost of kraft face insulation isn't that much more than unfaced
> insulation and for the average DIY'er it install much easier.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com



Posted by Tom The Great on August 11, 2006, 9:04 am
On 10 Aug 2006 07:27:11 -0700, beerguzzler50@yahoo.com wrote:

>I have a wood framed detached garage that I would like to insulate. I
>only plan on heating it a few times a year when I have a project to do
>or something I have to fix in winter (I live in upstate NY) with a
>portable heater. The garage is wrapped on the outside with Tyvek over
>the plywood and covered with vinyl siding. I plan on using r13
>fiberglass insulation on the sides and r19 in the ceiling.
>
>Is there any reason why I should use kraft faced in this situation? It
>is more expensive and I have a vapor barrier already with the Tyvek
>right? I will be covering the inside with 5/8 drywall on both walls
>and ceiling.
>
>Thanks.

imho,

The vapor barrior is intended on keeping warm most air from entering
the insulation, and then condensing as it migrates to cooler spots of
the insulation. Since you don't want trapped moisture in your
insulation, could create mold conditions, reduce insulation
properties, expose wood studs to to rotting; you want to use a
moisture barrior on the inside face of the insulation.

later,

tom @ www.WorkAtHomePlans.com


Page 1 of 2       1 2 > last >>
Similar ThreadsPosted
Insulation & vapor barrier July 3, 2007, 7:34 am
Moisture between vapor barrier and insulation in shed February 10, 2007, 7:05 pm
Wine Cellar contstruction - Insulation & Vapor Barrier August 21, 2006, 6:30 pm
Adding 2nd floor above detached garage March 18, 2007, 7:07 pm
adequate spacing between detached garage and house? August 19, 2006, 12:37 pm
vapor barrier??? May 4, 2007, 9:19 pm
Ceiling, Strapping before/after vapor barrier July 17, 2006, 11:03 pm
vapor barrier for three season porch June 21, 2007, 8:20 am
OSB with built-in vapor barrier question February 4, 2008, 1:19 pm
Concrete Slab Glue Down Vapor Barrier? July 11, 2006, 9:41 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap