Even if it’s not windy at all, my door would slam with the slightest push. Does not happen with my windows closed.
In: Physics
Two things are possibly happening. If your room is well-sealed, closed windows, and you try and close the door: the air has nowhere to go as the door closes, so it resists that last few inches of closing. I have this pretty bad in my pantry. The other thing that might be happening is a slight breeze; if there happens to be even the slightest breeze, closing the door will catch that breeze and you’ll have a kite the size of a door forcing that door closed. Keep in mind that tiny changes of pressure over the large area of a door can very quickly add up to a quite significant resulting force.
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