G'day and welcome back to Buildsum and in this video
I just want to go through the process of working out the height to put in our door head when we're building a wall frame
So obviously in this opening We've got to fit our door, our jamb gonna
have a little bit of a clearance over the top of the door just so that if our load came on to this
Head it wouldn't bow and touch the top of the door
and we've got a little bit under the door for our carpet, so let's have a look at
the side of the door so obviously the biggest dimension we're gonna have to worry about is our door itself
standard door 2.040m
however nowadays you can get them just about any height you like and if you're doing
renovations, or you're using secondhand doors
maybe worth checking actual size of the door so
First dimension you need to include is the actual height of the door
then above the door we've got to consider a few things so the clearance
between the door and our Jamb
3 mm usually if you're gonna paint the door in the Jamb
Or if you're only going to use a clear coat and around 2mm
We also have to consider the thickness of our gem material, so I've got 15mm in this case, but it could be 18mm
fairly common and then above the door
The timber framing code
Actually says we have to have
15mm clearance between our
Top of our door jamb and the head especially in a load-bearing wall
Okay, so we just generally lay our 15mm above the door as well
So that's everything up there don't forget into the bottom of the door
So the door finishes here, and we actually want the jamb to continue and sit right down
on whatever our for surface was whether it's a concrete slab or
Particle board flooring
And then of course on top of that you're gonna have your carpet or your floating floor
Whatever the case may be so you have to have a bit of an allowance
For that just so you're not cutting off the bottom of the door
So this case I'm going to allow 25mm
Underneath there for that so with all those added up
We actually end up with a door height
Or an opening height of around 2.098m so yeah very close
to 2.1m
Which is fairly standard just a thing to watch if you're not going to have as much of a floor covering like just vinyl or something
Then you may you know you're gonna have to take about 20mm off
This the biggest problem is if this head's too low
Then your architrave may not cover the opening so you want to make sure that head is reasonably close, so
2.1. You know for about an inch or 25mm of floor covering, 2.1m is a fairly standard
Opening size if you're not going to have
any
Or much under your door then you might have to go to say 2.080 as your opening size, but that'll give you
The height that you need to put in your door head
You know timber frames, that's from the underside of the plate to
The underside of that door head or door trimmer
in your frame
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