We're building a new home in Phoenix, AZ.
The builder is offering Tech Shield for $1,125 for a 2100 sq/ft, three
They also offer an upgrade from R-30 to R-38 ceiling insulation for
For exterior walls, they offer an upgrade to 2x6 construction which
includes R-19 up from R-13 with the standard 2x4 construction. The
cost for this is $5,665. I can get an insulation-only upgrade from
R-13 to R-15 for $1360.
The footprint of the house is apx. 25'x50. The 50' sides face east-
west. There will be another two story house to the west that will
block a good portion of the afternoon sun from the side walls of the
Tech Shield advertises 20-30% energy cost savings but I wanted to see
if others could offer some real-world figures for this upgrade.
I think the R-38 ceiling insulation upgrade will be worth the cost.
As far as the exterior walls are concerned, we were thinking the home
to the west would give enough shade so that it would take us forever
for the 2x6/R-19 insulation upgrade to pay for itself in energy cost
savings. R-13 to R-15 doesn't seem like much of an upgrade, so again,
it seems like it would be a long time before it paid for itself.
Just wanted to toss this out to get some opinions of others.