Why do indoors have a gap at the bottom?

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  #1  
Old 04-02-12, 10:32 AM
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Why do indoors have a gap at the bottom?

No one could answer me this question exactly.
 
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  #2  
Old 04-02-12, 10:35 AM
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Air flow - you want air to move in and out of the room.

Example: you have the bathroom fan running with the door closed - you need the gap at the bottom to allow the make up air into the room.
 
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Old 04-02-12, 10:38 AM
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Oh, wow, that was fast. Can I close this gap and put some door vent grills in?
 
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Old 04-02-12, 10:43 AM
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Well...if you want it to look more like a dormitory or office you could.

How big are the gaps...3/4" is about the norm. This allows for airflow between rooms from heating and cooling vents as well as the aforementioned exhaust fans.
 
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Old 04-02-12, 10:48 AM
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In Europe it is the norm to use such grills. Gap is around 1 inch
 
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Old 04-02-12, 11:25 AM
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Does the door have a threshold? If not, I would think there would be a possibility of the door getting hung up on the flooring.
 
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Old 04-02-12, 11:25 AM
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True...I remember that from staying in Italy. It's just not common in the US...esp when paneled doors are so commonly used.
 
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Old 04-02-12, 03:52 PM
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Hi, I have installed louvered doors in bathrooms to prevent mold. It did the job. Gaps under doors are also used as return air ducts. If the air can't get out the warm air from the furnace can't get in. It's a static air pressure thing.
Good Luck Woodbutcher
 
  #9  
Old 04-02-12, 05:42 PM
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Originally Posted by mitch17 View Post
Does the door have a threshold? If not, I would think there would be a possibility of the door getting hung up on the flooring.
Yes, all doors in Europe have threshold and I would like to do the same with my doors.
 
  #10  
Old 04-02-12, 05:49 PM
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Originally Posted by Woodbutcher View Post
Hi, I have installed louvered doors in bathrooms to prevent mold. It did the job. Gaps under doors are also used as return air ducts. If the air can't get out the warm air from the furnace can't get in. It's a static air pressure thing.
Good Luck Woodbutcher
But not if I put a vent grill in the door, right?
 
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Old 04-02-12, 06:29 PM
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I don't "mind the gap". LOL Sorry for the bad pun... a little London tube humor.
 
  #12  
Old 04-03-12, 12:29 PM
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Hi, I have put vent grills in a door. The problem is the don't provide privacy. you may get away with putting a grill on each side with a filiter in the middle.
They do make louvers you can install in a door that you can't see through. Takes about 45 minitues to tnstall. An example would be a 24" door will take about a 12x12 Louver. They install like a window. Cut the hole and the louver has frames that sandwitch the door between them.
Good Luck Woodbutcher
 
  #13  
Old 04-03-12, 03:51 PM
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If I, I am install a small vent grill down on the bottom, in and out. Privacy is still there. I think there is even more privacy if this gap is gone.
 
  #14  
Old 04-03-12, 04:01 PM
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The gap also helps the door not hit the floor if things are out of level in the home. My house was built in 1928 and the doors have very little gap with raised thresholds. This does not occur with any of the closets or the door between the hall and dining room.
 
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