One of the 3 bedrooms upstairs in my new house has a strange problem in
which the temperature inside the room got as high as 84 degrees last
Thursday even when it was only in the mid 50's outside. I find this problem
strange because I live in the northeast (Northern NJ), and don't recall ever
owning a house in which a room gets so warm in the fall on a sunny day.

This problem is not due to the heating system which was not on that day. I
checked to see if the attic above has insulation, and the room does have
insulation in the attic above it, and the ceiling does not feel warm. It
seems to me that the cause of the problem is sunlight hitting the roughly 4'
x 4' window that faces the south. Even if I have the aluminum shades
closed all the way the room gets hot (as high as mid 80s in late October on
a sunny day when it's only in the mid 50s).

I'm just wondering how this problem can be solved (besides opening the
window, which isn't an option when I'm recording music in the room). Are
there any special blinds that will prevent so much heat getting into the
room due to the sunlight hitting the window? I've read about Hunter Douglas
triple-honeycomb blinds which supposedly stop 76% of solar heat from
entering a house. Will these blinds really solve the problem? If not, what
other blinds or shades will do the trick?

Thanks,

J.