mike wrote:
The front of my house faces the evening sun.
When it's 100 outside, the brown front door is 184 degrees F.
Stuck a square of white insulation board in front of the door.
It got up to 107 degrees.
The light-gray house is at 164 degrees.
I started thinking about painting the front of the house white.
Did some online research and found mention of paint that's highly
reflective in both visible and IR parts of the spectrum,
but nothing on where to buy it.

Most info was about coatings for roofing.

There's even some ceramic sphere additive that claims to
cut solar heat gain to near zero. Seems like if this worked
as well as they claim, it'd be everywhere. Went to big-box
stores and dedicated paint stores. Nobody heard of it.

Will repainting the front of the house buy me anything?
The walls are R19 and the windows are low-E R3.3-ish with SHGC of .3.
Door is fiberglass r5-ish.

Reflective paint recommendations?


A white door is artistically acceptable, but before you paint it, what's the
temperature on the INSIDE side of the door. The door itself may already be
adequate.

Trees, shrubs, and awnings will not cause as much palpitation by your HOA as
a reflective house.

I've got an awning over the patio - in front of the glass, sliding, patio
door. Using the $9.95 remote-sensing thermometer from HD, the concrete
directly in the sun measured 130° while the concrete on the patio measured
104°.