All right, guys.
What I'm going to show you today is how to install your bearers and your joists as part
of your sub floor.
Some of the tools we're going to use are the nail gun, the circular saw, the silicon gun
for our glues, a hammer, our hearing protection for our saw, and some safety glasses.
We've also got our tape measure, pencil, and our square.
We've got a couple of packers in here as well in case I've got to lift up some of these
bearers, and some malthoid, which gives us our barrier protection between the timber
and the brickwork.
First thing I'm going to demonstrate is how to put our two bearers together.
These are LVLs, laminated veneer lumber.
They are specified on our engineers' drawings as the required item to use.
What I'm going to do is I'm going to lay the two of them out flat.
I'm going to use this construction adhesive, and I'm going to put a nice big bead right
across the full length of the timber beam.
That way you can maximize your strength and your adhesion.
Now what I want to do is roll the other timber over.
I'm going to move the top one around a little bit so that it really spreads that glue around.
I want to make sure that both surfaces across this face here are flush with each other.
I really don't want one higher than the other, I don't want that happening.
I want it nice and flat so they're nice and flush with each other.
I'm now going to put a sequence of double nails through it to really lock it down.
As I'm nailing I'm checking that front surface, that top surface, to make sure it's flush
as I nail.
What I've got here, guys, is some malthoid.
The malthoid goes in between the brickwork and the timber.
It's a moisture barrier, so it's a protection between the brickwork and the timber.
I've got a few of these to cut.
We need to cut them nice and big so they cover the full area of the brickwork.
If it doesn't cover, the moisture can still get through the unprotected area.
It's now time to lift that bearer into place and get it positioned, and then we can make
a start on our next bearer.
I don't really want it touching any of the brickwork for the same reasons that we put
the malthoid underneath the bearer.
Any of this brickwork here can draw moisture in, and if it draws the moisture in, it can
actually get into the timber.
So we want to give it that protection and give it that air gap so the air still flows
under and around the timbers.
We've now put that first bearer into position.
The sequence I've got now is I'll follow behind and put the remaining three sets of bearers
back into position.
It's the same principle, and then we'll look at putting our joists down.
Now this hoop on here is actually embedded inside the brick here behind this little brick
wall here, so you want to nail that down with a couple of these clouts.
And you'd nail that all the way down and you get a few down this opposite face as well.
And what that does is that's your hold- down feature of all your bearers, and that'll hold
it down nice and secure.
Before I put the joists on, I need to make sure that they are sitting nice and level.
I've got my level on here.
I can see that this end needs to come up just a little bit.
A couple of cement sheet packers there.
Our compress sheet is now used as a packer for our bearer, which is nice and level.
This room that we're building here is going to be an extension of this room inside.
So you can see where I've measured.
I've got it right up against that far wall there.
And what I've done is I've set up the first joist to sit half and half on our flooring.
So you can see where I've put this one here now.
I've marked that one.
I've pulled right up to the edge of the bearer.
I've got it sitting on my line there.
So my next step now is to fix it off.
You need a nail on both sides to keep it upright nice and strong and nice and firm.
As you can see I've fixed my first floor joist in.
I've put the extension piece right up to the far side there because it's not long enough
to go all the way in one piece.
You can see this end is also the same.
It's got a short length on it, so it's a full length one coming from the far side back up
to here, and I've got the short length on.
The next one, the full-length will start at the opposite side and so on, so I don't have
all my cut lengths of floor joists at one end of the floor.
They must be staggered.
I've fixed this short one into place now.
In this case, we decided to butt join them.
We've got quite a wide bearer to sit on.
This way I prefer as it makes it nice and easy when you put in your floor sheet so it's
only keeping one line.
So I've got all my lines marked there and to the right hand side of my line, which means
every floor joist from one face to the same face on your next timber.
They're all at four-fifty centimeters, as that works with my floor sheeting, so all
the while checking that they are on that line that I chalked in.
Now that I've got this one in place, I'm now going to go in and put the rest of them in.
Fix them all down following the same principle.
Okay guys, you can see now that I've gone through and nailed all my LVL joists over
the top of all of my bearers.
You can also see in-between the joists I've put these noggins in.
And what these noggins do is they reinforce the joists and help keep it upright and vertical
in the strongest position.
I'm going to demonstrate how to put one of these in now, I've got the last one here to
do.
So now that that noggin is in place, it stops this joist and this joist from getting any
rollover action as well.
I'm going to finally demonstrate how to put these hold-down hoop-on straps on.
You know this strap is encapsulated in this brick wall here, and it goes over the joist.
It's going to get covered down onto the bearer as well.
Now keep it reasonably flat, reasonably tight.
And it's designed to prevent any uplift in some serious winds.
And what I do from here is I continue down and put another sequence of nails all the
way down through there, and that way we ensure that the sub floor is not going to be affected
by any serious storms or winds.
So that's your sub floor, guys, ready for your flooring.