(banjo music)
- So with this doorway, the jambs will be sitting
hard down on the timber floor.
So they've both gotta be exactly the right length.
Now the drama is that with an old floor,
or even a new floor sometimes,
the opening might not be level.
There might be a few millimeters' difference
from that side of the floor to that side of the floor,
so if you cut the jamb, or both jambs,
exactly the same length, more often than not,
by the time this jamb goes down hard on the ground,
the top isn't going to be level.
So what you need to do is to place the hinge side jamb
where it's meant to go, and then get a level.
And level across
from the hinge side jamb
across to the other opening.
So get that nice and level, which is right
there.
Then mark it.
And now we can measure the length of this jamb.
Which just happens to be
from the floor
2350
That one there was 2348.
So there's two mil difference.
Let's cut that jamb.
All righty.
Get that around the right way.
Like that.
That's perfect to our line.
Now, both jambs are cut.
Now we need to cut the head.
Now how wide you cut your door head
will depend on how wide your door is.
Now I have
an 820 wide door.
There it is.
That's 820 millimeters wide.
Now the gap on either side of your door is recommended to be
between two and a half and three millimeters.
I'm using three millimeters,
so we add three on either side.
That's millimeters.
Now on the other side of that gap we have our door jamb,
which is
17 millimeters.
So that's 17 on that side and 17 on this side.
All right.
This is very rough.
So we've got 17 for door jamb, three mil gap,
820 door, three mil gap, and 17 mil jamb.
So we add those together, so we've got 17,
17, three, three, and 820,
and we finish up with 860 millimeters.
And that's the size that we cut our door head.
So I mark the head at 860 millimeters,
and there.
And now I'll cut that to length.
Now you might also notice that I'm using a rebated jamb,
which just saves me again the track
of putting the doorstop on.
Now you could use a flat jamb like this one here,
but you'll need to install the door stop afterwards.
The next thing you need to do is that
we need to rebate this jamb out
so that these to finishers, that edge and that edge meet.
So we place this off cut onto our jamb,
onto our door jamb head, and then just simply mark that.
Now we check this section out,
which will bring these two surfaces together.
Now if you've got a flat jamb,
like this one here,
all you need to is to get another section of flat jamb,
put it on like that, mark it,
and then just check out about halfway,
check out this section here,
and then this piece will sit inside that check out.
And when we're making this check out,
we don't wanna cut into this section here.
So the saw goes down, and it'll finish up
right where those two edges meet.
Once you've made that cut, just simply check that out
and then do the same to the other end.
Now just make sure that it's nice and flat and square,
which that is.
That's beautiful, m'kay.
And once this is all done,
it's just a matter of nailing the whole thing together.
And with that door head now cut,
let's go ahead and put that door jamb together.
Now before we get too excited,
I just wanna check one more time
that both of those jambs are actually level.
I think I've got a touch of OCD.
So just placing these jambs back in position.
And I'll get up top and just have a quick look.
Now that is perfect.
We're good to go.
There's nothing worse than putting the whole jamb together,
standing it up, and seeing that it's out of level.
So it's just a good idea just to check a couple of times
before you commit yourself.
Commit yourself?
I think I need to be committed.
Now what we'll need to do to put this jamb together
is run some glue along both of those check outs,
and then just simply nail it together.
And there you have it.
That is now ready to be installed.
So your job now is to go back to the shed
and assemble that door jamb,
and then come back for the next video
which I'll leave a link for in the description box below
where we will install that door jamb and then hang the door.
You're almost there.
(claps)
All right.
Well, I hope you enjoyed and found that video useful,
and as per usual, a big thumbs up is greatly appreciated,
and if you haven't already, please hit that Subscribe button
for more hanging tips.
(claps)
Well, what are you doing?
It's not gonna put itself together.
Back to the shed, and I'll see you next time.
And good luck.
Cheers.