The block homes have an R-5 board of insulation attached on the inside. The cavities in the block will hold air that also may act as insulation. I believe they fill the cavities of every 5th column of block with rebarb and concrete (or something like that).
The framed homes have the 3.5" space between the 2x4 studs filled with fiberglass insulation that is nominally rated at R-11.
Typically the largest heat gain is from windows. The windows the builders use are not the most energy efficient windows you can buy ( look at the U-factor and SHGC ). I believe the new homes they are building now use better windows.
Quote:
Originally Posted by cmj1210
Wouldn't the block also be considered some sort of insulation? You mention the walls but nothing about the block itself.
|