Go Back  DoItYourself.com Community Forums > Interior Improvement Center > Doors, Skylights and Windows
Reload this Page >

Installing a door on a finished floor or the subfloor

Installing a door on a finished floor or the subfloor

Reply

  #1  
Old 01-25-15, 12:44 AM
Member
Thread Starter
Join Date: Mar 2012
Location: USA
Posts: 384
Received 0 Votes on 0 Posts
Installing a door on a finished floor or the subfloor

I think in new construction the doors go on top of the sub-floor. I am doing a bit of a renovation and already have a finished wood floor. A new door is going into a space that didn't previously have a door, but now there is a nicely built clean rough opening to put a door.

Should I...
  1. Cut the small area of wood floor out to place the door jambs on top of the sub-floor
    - OR -
  2. Cut a small amount of the lower door jamb so that the door is the same level as the other doors in the house?
 
Sponsored Links
  #2  
Old 01-25-15, 04:23 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 46,266
Received 140 Votes on 125 Posts
Normally when doors are set in new construction they are raised enough to allow the finished floor to slide under them. IF the new door will set to too high to match the rest - cut the bottom of the jamb [door if needed] so it aligns with the rest.
 
  #3  
Old 01-25-15, 04:31 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 2 Votes on 2 Posts
What is your finished floor? Is it exterior or interior?
 
  #4  
Old 01-25-15, 08:11 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 23,475
Received 243 Votes on 224 Posts
Option 2. In new construction, all doors are set at the same height. So if you have a wood floor you check the opening for level, cut both legs but cut one leg longer if needed so that the head is level. The final result should be a door that's the same height as the other interior doors.
 
  #5  
Old 01-25-15, 09:11 PM
Member
Thread Starter
Join Date: Mar 2012
Location: USA
Posts: 384
Received 0 Votes on 0 Posts
Whoops! Maybe I was mistaken then.

I just had some exterior doors all installed directly on the subfloor, and I didn't bother to raise the bottom of the door jambs to be at the level of the finished floor. I guess I messed up. I actually thought that doors are supposed to be installed directly on the subfloor and the bottom of the door jambs at the level of the subfloor.

In any case, where I am at now is installing the interior doors. I figure that I need to install them at the level of the subfloor to match all the exterior doors. So my options are either cutting some of the subfloor out so I can rest the door jambs on the subfloor. Or... just cut the bottom of the door jambs the width of the subfloor, and just have the door jambs sit on top of the finished floor. Both options are easy to do. What do the contractors do in this instance?
 
  #6  
Old 01-25-15, 09:16 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 23,475
Received 243 Votes on 224 Posts
At the risk of repeating... option 2.
 
  #7  
Old 01-26-15, 06:50 AM
Member
Join Date: Feb 2006
Location: USA
Posts: 6,571
Received 4 Votes on 4 Posts
Exterior vs. Interior

To the pros: I was thinking pre-hung exterior doors rest on the sub-floor. Am i wrong?
 
  #8  
Old 01-26-15, 07:15 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 23,475
Received 243 Votes on 224 Posts
Exterior doors are often set right on the subfloor. They are slightly taller than interior doors due to the thresholds. When you will have a 3/4" hardwood floor inside, (or even durock and tile) you usually want to shim the door up from the subfloor with 1/2" plywood, otherwise the door will drag if a thick rug is placed on top of the finished floor in front of the door.

Exterior door jambs are usually around 82" tall. Interior doors are usually 81 1/2".
 
  #9  
Old 01-26-15, 04:42 PM
Member
Thread Starter
Join Date: Mar 2012
Location: USA
Posts: 384
Received 0 Votes on 0 Posts
Oh no. This is bad. I had bought some exterior doors from Home Depot, and instead of installing them myself I had the Home Depot pros install them. They installed directly on top of the subfloor! And they didn't bother to even shim the door up 1/2" at all!

I don't know. I initially had questions about installing interior doors when I first posted the thread, but now I find out that my exterior doors where installed directly on the subfloor. Maybe I should just take all the exterior doors out and re-install them with a 1/2" shim directly between the subfloor and bottom door jambs.
 
  #10  
Old 01-26-15, 04:47 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 23,475
Received 243 Votes on 224 Posts
You are probably fretting about nothing. If the door swings open with a rug in front of it thats all that matters.

The other jambs can be undercut with a jamb saw so the floor slips underneath. And if the doors are too close to the floor after floor covering is installed they can be cut.
 
  #11  
Old 01-30-15, 04:59 PM
Member
Thread Starter
Join Date: Mar 2012
Location: USA
Posts: 384
Received 0 Votes on 0 Posts
Ok thanks guys. There is currently hardwood flooring in the house. Unfortunately, when I had the exterior doors installed I didn't know to have those exterior doors raised 1/2" above the subfloor. Yes, I actually had the exterior doors installed directly on top of the subfloor. Do you think I should go ahead and redo those exterior doors to raise them off the subfloor by 1/2"?
 
  #12  
Old 01-31-15, 04:40 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 46,266
Received 140 Votes on 125 Posts
Will the exterior doors clear the finished floor ok when you open them? As long as the door will open I'd be inclined to leave it as is. You can always under cut the casing to slip the flooring under it.
 
  #13  
Old 01-31-15, 02:38 PM
Member
Thread Starter
Join Date: Mar 2012
Location: USA
Posts: 384
Received 0 Votes on 0 Posts
Thanks marksr. Yes, the way the exterior doors are, they open into the house where I have finished wood floors. They open and shut fine right now without any entry rug.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: