# Insulation Measurment - Funny Math

• posted on October 8, 2008, 3:05 pm

I need to insulate 900 sqft of space. When I look at R-30 batts from home depot they are marked 53.3 sqft. The actual measurment is 10"x16"x48". Unless my math has failed me the measurment for sqft is lengthxwidth. If you do the math for the HD R-30 insulation it comes out to 5.3 sqft - 16"x48"v8sq inches, 768/144=5.33 sqft. It would appear that what is shown on the bag is cubic feet, not sqft. So my questin is this; how many batts to insulate a 900 sqft area, 16.8 or 168.8?
These are the batts here: http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId051&langId=-1&catalogId053&productId0317742&N000003+90029+527411
âœ–
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on October 8, 2008, 3:23 pm
On Oct 8, 10:05 am, Carbon Fiber Composite Expert wrote:

Read the bag, there are 10 - 5.3 sq ft batts in that bag.
âœ–
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on October 8, 2008, 3:29 pm
On Wed, 8 Oct 2008 08:23:59 -0700 (PDT), ransley

Doh and double doh!!!!
âœ–
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on October 8, 2008, 5:19 pm
Carbon Fiber Composit Expert wrote: