Insulation / heating question

[boiler717]

Our bonus room is fully over the garage. It has two sides that are exterior walls. We expected it to be somewhat chilly and kinda a pain to keep warm during the winter and cool during the summer.

We've used it a few times since we've had furniture in it and it is broiling. To the point that we wind up opening the window (and it's freezing outside). Does anyone have any suggestions on what to do? Do you think our builder just over insulated over fear of it being cold?

[FoxInFiji]

Yes it's probably close to the furnace and getting too much supply air. Try closing the vents. It could be far away from the thermostat as well. You can't really over insulate a residential home.

[boiler717]

Our furnace is in the basement. I will try closing a vent, thanks!