# Maxiimum Insulation in 2x10?

• posted on February 1, 2004, 7:44 pm
What the maximum R-value fiberglass nsulation bat that will fit without compression in a 2x10 with a vent baffle?
Thanks.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on February 1, 2004, 8:19 pm
Fiberglass is 3.5 r per inch so R 29.75 for 8.5 ", figuring a 1"baffle There is a higher R value fiberglass made maybe it is 3.75 R per inch
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on February 1, 2004, 11:03 pm

And maybe you know what you're talking about, maybe not.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on February 2, 2004, 2:49 pm
snipped-for-privacy@yahoo.com (Paul) writes:

try googling around for the R value per inch. (Ransley says 3.5 and that sounds about right) the depth of the 2x10 is 9.5 inches (IIRC) minus the vent baffle depth (don't know what that is) * the above researched r/inch is your maximum fiberglass insulation.
Lets say the baffle takes up 1 inch (a guess) and the 3.5R/inch figure is correct: (9.5" - 1") * 3.5R/" = 8.5" * 3.5R/" = 29.75R"/" = 29.75R
If you have 2x10s and a vent baffle, i'm going to guess that it's a roof. If that's the case, I'd be tempted to use foam which can give you up to ~7R/" (R60 in your instance) but then we don't know where you live or what your climate is like. Look up with to DOE what the suggested R values for you walls and roof are in your state to see which way you should go.
--
be safe.
flip
Verso l'esterno! Verso l'esterno! Deamons di ignoranza.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on February 3, 2004, 2:38 pm
Thanks all for the information. Thanks also for the tip to check out the DOE, which has a wealth of information on the insulation. Here's the link for others:
http://www.eere.energy.gov/consumerinfo/
(Paul) writes:

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• Share To

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.