Slamming door,

mailorderchild · Joined: 16 Oct 2011 Posts: 91 Location: Wolverhampton UK

Okay a friend of mine was talking to me at work and she said that her son had their kitchen door slam in his face.

I kinda grilled her a bit. Could it be possible that it was suction from an open window/door elsewhere in the house?

The door opens into the house, it's a very heavy sturdy security door, her son was coming towards the house from outside and the door slammed in his face. She said there were no windows open and no other doors were opened or shut.

Now, it's getting cold here, could a warm house and cold air outside form some kinda suction?

Mark Mauvais · Joined: 30 Oct 2011 Posts: 10 Location: England, UK

You are indeed correct to be skeptical about this. Most cases where doors slam shut are not from wind as it were but from a change in air pressure. Your explanation of the old outdoor air and warm indoor air would explain that perfectly!

(Also I see your from Wolverhampton. Not a million miles away from me!)

D B Sweeney · Posted: Thu Nov 03, 2011 11:49 pm Post subject:

KiloCharlie · Joined: 27 Oct 2011 Posts: 47

Our door slams shut a lot, but only if the door into the garden is closed. If both doors are open it's a door else where that slams shut. My own guess is that the door is in effect in north facing passage & thus the breeze would always be from a warmer area. Thus a lower air pressure area. So if the door has been open for a minute or so & temperature & pressure has balanced. When warmer air (thus a higher pressure air,) passes the pocket of colder air in the open door, it causes the cold (higher pressure,) air to move towards the warm, lower pressure air outside & that probably explains both why an inner door slams as the garden air is warmest & the front door slams if the garden (south facing,) door is closed.

mailorderchild · Joined: 16 Oct 2011 Posts: 91 Location: Wolverhampton UK

I figured as much!

Thank you guys. :)

Mark, where abouts are you hiding then? :)

I wanna have a World of Ghosts meet. :D

carlos2010 · Joined: 23 Oct 2010 Posts: 288

Our doors do this all the time, the front door can slam when the back door is open or closed.

what doesnt help is the half inch gap at the bottom of the back door, creates a wind tunnel effect in the house.