Hi,

I've decided to replace the dodgy bit of plasterboard sitting betwixt the
joists and the wall top.

Wall is single brick.

Do I just slide a woodent plank in onto the top of the wall (after
acro-propping the joists up a fraction and clearing out the PB) or do I
need to bed it on with something (bearing in mind the plate thickness is
about 12-15mm).

What would be a suitable material to use - is plain softwood OK?

Should I attempt to fix the joists to the plate (hard I realise as the plate
is thin)?

This is a 3.6m section of wall.


Cheers

Tim

"Tim S" wrote in message
...
Hi,

I've decided to replace the dodgy bit of plasterboard sitting betwixt the
joists and the wall top.

Wall is single brick.

Do I just slide a woodent plank in onto the top of the wall (after
acro-propping the joists up a fraction and clearing out the PB) or do I
need to bed it on with something (bearing in mind the plate thickness is
about 12-15mm).

What would be a suitable material to use - is plain softwood OK?

Should I attempt to fix the joists to the plate (hard I realise as the
plate
is thin)?

This is a 3.6m section of wall.


Cheers

Tim

surely the joists are already on the wall top as the plasterboard would be
fitted afterwards

the plasterboard would butt up to the wall before the wall was then
plastered

Unless of course the wall was added later in which case it would not be load
bearing and it would not matter if the joists touched it or not

Or am I missing something?

Tony

TMC coughed up some electrons that declared:


"Tim S" wrote in message
...
Hi,

I've decided to replace the dodgy bit of plasterboard sitting betwixt the
joists and the wall top.

Wall is single brick.

Do I just slide a woodent plank in onto the top of the wall (after
acro-propping the joists up a fraction and clearing out the PB) or do I
need to bed it on with something (bearing in mind the plate thickness is
about 12-15mm).

What would be a suitable material to use - is plain softwood OK?

Should I attempt to fix the joists to the plate (hard I realise as the
plate
is thin)?

This is a 3.6m section of wall.


Cheers

Tim

surely the joists are already on the wall top as the plasterboard would be
fitted afterwards

Ideally, in a world devoid of nobheads, I would agree.

the plasterboard would butt up to the wall before the wall was then
plastered

Unless of course the wall was added later in which case it would not be
load bearing and it would not matter if the joists touched it or not

Or am I missing something?

I think the only thing missing was the builder's braincell...

You may indeed say "surely", but if you look he

http://www.dionic.net/Alveston/Joist...g_0017_gb.html

and here

http://www.dionic.net/Alveston/Joist...g_0022_gb.html

you'll notice what seems to be a distinct absence of a plate. The wall
really is bang under the red writing in both photos.

The diagram at:

http://www.dionic.net/Alveston/Joist...tfloor_gb.html

show the bit in question, either side of area B

It's hard to tell if that section of the wall is "original" as the house has
been modified several times since 1950. However, it's clear from the
general structure that that section of wall is supposed to bear the joists.

The bit in the middle (definately original) is done right:

http://www.dionic.net/Alveston/Joist...g_0015_gb.html

Bloody weird isn't it... If they'd used a narrow strip of PB as a "plate"
I'd understand that, as an obvious bodge. Doing what they've done looks
harder than doing it right in the first place.

Cheers

Tim

"Tim S" wrote in message
...
TMC coughed up some electrons that declared:


"Tim S" wrote in message
...
Hi,

I've decided to replace the dodgy bit of plasterboard sitting betwixt
the
joists and the wall top.

Wall is single brick.

Do I just slide a woodent plank in onto the top of the wall (after
acro-propping the joists up a fraction and clearing out the PB) or do I
need to bed it on with something (bearing in mind the plate thickness is
about 12-15mm).

What would be a suitable material to use - is plain softwood OK?

Should I attempt to fix the joists to the plate (hard I realise as the
plate
is thin)?

This is a 3.6m section of wall.


Cheers

Tim

surely the joists are already on the wall top as the plasterboard would
be
fitted afterwards

Ideally, in a world devoid of nobheads, I would agree.

the plasterboard would butt up to the wall before the wall was then
plastered

Unless of course the wall was added later in which case it would not be
load bearing and it would not matter if the joists touched it or not

Or am I missing something?

I think the only thing missing was the builder's braincell...

You may indeed say "surely", but if you look he

http://www.dionic.net/Alveston/Joist...g_0017_gb.html

and here

http://www.dionic.net/Alveston/Joist...g_0022_gb.html

you'll notice what seems to be a distinct absence of a plate. The wall
really is bang under the red writing in both photos.

The diagram at:

http://www.dionic.net/Alveston/Joist...tfloor_gb.html

show the bit in question, either side of area B

It's hard to tell if that section of the wall is "original" as the house
has
been modified several times since 1950. However, it's clear from the
general structure that that section of wall is supposed to bear the
joists.

The bit in the middle (definately original) is done right:

http://www.dionic.net/Alveston/Joist...g_0015_gb.html

Bloody weird isn't it... If they'd used a narrow strip of PB as a "plate"
I'd understand that, as an obvious bodge. Doing what they've done looks
harder than doing it right in the first place.

Cheers

Tim

It does seem very odd

I cannot work out how they could put up the plaster board before the joints
or why on earth they would want to do so

As to a solution I think that I would use some 12 mm ply and put individual
pads under each joist

this would be the easiest thing to do and would be better than the original

I would not even bother fixing the pads in place the weight of the joists
will hold them

Tony

TMC coughed up some electrons that declared:


It does seem very odd
I cannot work out how they could put up the plaster board before the
joints or why on earth they would want to do so

My thoughts exactly. It would have been a bodge if they'd used small offcuts
of PB. This is just perverted, but not in the Jemma Jameson and a vat of
whipped cream sort of way...

As to a solution I think that I would use some 12 mm ply and put
individual pads under each joist

Sir, you are a genius. I reckon I could cut and chisel out the PB under each
rafter one by one from above and tap a bit of ply in. I could arrange to
lift each joist a fraction using the neighbours just to make it a bit
easier. Seems that if they've used 12mm PB as packing, 12mm ply should get
it back in the same place. I'll check the thickness of the PB in question.
Might just do this without damaging the ceiling.

Time to buy that Fein...

this would be the easiest thing to do and would be better than the
original

I would not even bother fixing the pads in place the weight of the joists
will hold them

Thanks for giving me confidence. If it turns out the wall top is too rough I
could always put a bit of Plastic Padding or similar epoxy in too.

Cheers and many thanks indeed.

Tim