Most people notice this in the winter when cold air blows through a wall outlet on an exterior wall.
Cold air coming through walls.
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Cover your windows with thermal draperies.
Put up pictures or a mirror on exterior walls doing so can help insulate walls from the outside air.
As that warmed air leaves the interior wall cold attic air moves into the cavity to take its place.
The warm air then rises into the attic a process called the stack effect.
Or in the summer when the hot 100 f air finds its way into your cool inside living space.
Using an infrared sensor we discovered that a lot of the cold air was being drawn in through.
You can expect higher heating and cooling bills if you have a lot of air infiltrating into your home.
Cold air coming through cracks and crevices in a window will lower the temperature of a room and make your walls cold.
With cold air inside the wall and warm air on each side in the house heat moves through the drywall which has a low r value and warms up the air in the cavity.
Air infiltration occurs when outside air finds its way inside your house.