I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Nick wrote:
I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Thicker PB might help noise transmission from your "dinning" room...
Anyway, 1/2" (12.5mm) plasterboard is a better bet than 3/8 (9mm) as
it's a bit stronger, as well as slightly better fire-wise. It's not
a lot dearer, either. I don't use thinner PB - I think it's a false
economy. You can get fire resistant PB - this costs twice as much
as "ordinary", and has glass fibres in the mix. It is noticably
stiffer, too, and you can tell it's different when you score/cut it.

J.B.

No reason for fire unless you require fireproofing between floors to satisfy
a regulation. In a normal domestic dwelling of ground floor and 1st floor
their is no reason to have a fireproof ceiling. I doubt if the doors will be
to fire retardent standard so a ceiling is not a problem. If the house has
to satisfy a regulation then it will be much more than the ceilings that
need doing. You usually put the thickness of board to suit the joist spacing

"Nick" wrote in message
om...
I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Its bloody heavy! I just spent most of the day boarding a 5x6m ceiling with
12.5mm TE board.

Tony

I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Don't know why but all ceilings are 12.5mm board, could be something to do with
sound? Fire? Less chance of sagging? Or all 3 and more.

In message , take away
nojunk writes
I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Don't know why but all ceilings are 12.5mm board,

They certainly aren't - I've done mine with 9.5 mm board. Just who do
you think uses up all those great piles of 9.5 mm board in the B&M's and
sheds?


could be something to do with
sound?

thicker board will marginally reduce sound transfer, but not to any
great amount I would think.

Fire?

As someone else has said, there is no need for this in the normal
domestic situation. There are of course situations where the extra fire
resistance is required.

Less chance of sagging?

Depends on the joists spacing I guess. Our joist are less than 450mm
spacing on the whole and it is no problem.

12.5mm board is significantly heavier than 9.5mm (about 25% I suppose).
If you are boarding a ceiling, esp. mostly by yourself, this makes a big
difference.

--
Chris French, Leeds

chris French wrote:
12.5mm board is significantly heavier than 9.5mm (about 25% I
suppose). If you are boarding a ceiling, esp. mostly by yourself,
this makes a big difference.

Suffering from a compressed neck by any chance?

In a similar vein, what are the top tips for plasterboarding a ceiling.
I guess exposed rafters are easier than adding to an existing lath & plaster
one.

I have knocked up a couple of T props, which are slightly longer than the
room height. Lean one against the wall to provide a ledge to start from,
lift board, rest on head, stick in other prop, screw in fixings.

--
Toby.

'One day son, all this will be finished'

In message , Toby
writes
chris French wrote:
12.5mm board is significantly heavier than 9.5mm (about 25% I
suppose). If you are boarding a ceiling, esp. mostly by yourself,
this makes a big difference.

Suffering from a compressed neck by any chance?

In a similar vein, what are the top tips for plasterboarding a ceiling.
I guess exposed rafters are easier than adding to an existing lath & plaster
one.

I've over-boarded a couple of lath and plaster ceilings -unless lots of
plaster has come away it's not a problem certainly preferable to
pulling it all down, though I accept it is a bit of a bodge i guess.

I have knocked up a couple of T props, which are slightly longer than the
room height. Lean one against the wall to provide a ledge to start from,
lift board, rest on head, stick in other prop, screw in fixings.

That's the sort of thing I do, though just lately - I'm just having
another room done tomorrow I leave it to the plasterers. A couple of
blokes who do it all the time can have the ceiling boarded in no time
and it doesn't really add very much to the final bill.

--
Chris French, Leeds

I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Don't know why but all ceilings are 12.5mm board,

They certainly aren't - I've done mine with 9.5 mm board. Just who do
you think uses up all those great piles of 9.5 mm board in the B&M's and
sheds?

NHBC regs state all ceilings are 12.5mm board minimum is what i meant
to say! The piles of 9.5MM board could be used on walls me thinks!!

In an earlier contribution to this discussion,
Tel wrote:


NHBC regs state all ceilings are 12.5mm board minimum is what i meant
to say! The piles of 9.5MM board could be used on walls me thinks!!


Once you've nailed it up and skimmed it, who's going to know the difference?
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is Black Hole!

Once you've nailed it up and skimmed it, who's going to know the
difference?
--
You, on reflection, standing by the pearly gates?

Sam

In message , Tel
writes
I have been told by a plasterer that the plasterboard thickness should
be 12mm for increased fire resistance (downstairs dinning room). Any
comments?

Don't know why but all ceilings are 12.5mm board,

They certainly aren't - I've done mine with 9.5 mm board. Just who do
you think uses up all those great piles of 9.5 mm board in the B&M's and
sheds?

NHBC regs state all ceilings are 12.5mm board minimum is what i meant
to say!

And the relevance of NHBC to those of us not building new houses......?

--
Chris French, Leeds