What mix do I need to attach plasterboard to a brick wall?

john wrote:
What mix do I need to attach plasterboard to a brick wall?


A mix of plasterboard adhesive and water.


--
Grunff

john wrote:
What mix do I need to attach plasterboard to a brick wall?

Plaster

john wrote:

What mix do I need to attach plasterboard to a brick wall?

A tin of expanding foam filler works very well also...


--
Cheers,

John.

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On Sun, 24 Jul 2005 05:00:08 +0100, John Rumm
wrote:

john wrote:

What mix do I need to attach plasterboard to a brick wall?

A tin of expanding foam filler works very well also...

I doubt that!

"Grunff" wrote in message
...
john wrote:
What mix do I need to attach plasterboard to a brick wall?


A mix of plasterboard adhesive and water.
--
Grunff

Quite right, either Gyproc or Knauf drywall adhesive, mixed to a thick
consistency with clean water. Do not try to use anything else as it will not
work properly, normal plasters do not have the correct adhesive qualities -
DO NOT USE spray foam - umless you want wobbly walls !
Franko.

madmax wrote:

A tin of expanding foam filler works very well also...


I doubt that!

Live and learn then...

been there, seen it, and done it, and it does work very well! ;-)

Just gently spray a thin bead of it (about an inch wide) along the back
of the board (I do a lap of the edge a couple of inches in plus a
lattice on about 400 centres) and push it onto the wall. It gives a very
ridgid mounting with much less messing about mixing either adhesive or
bonding plaster.



--
Cheers,

John.

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On Sun, 24 Jul 2005 14:22:09 +0100, John Rumm
wrote:

madmax wrote:

A tin of expanding foam filler works very well also...


I doubt that!

Live and learn then...

been there, seen it, and done it, and it does work very well! ;-)

Just gently spray a thin bead of it (about an inch wide) along the back
of the board (I do a lap of the edge a couple of inches in plus a
lattice on about 400 centres) and push it onto the wall. It gives a very
ridgid mounting with much less messing about mixing either adhesive or
bonding plaster.

Have you used it on 2.4 x 1.2 boards or is it just for the small, fit
in the back of the car, boards from say Wicks or B&Q? Foam cant have
anything like the strength of adhesive which sets harder than other
hard setting thing.

Downsides I forsee are
1/ foam continues to expand as it sets so board pushed out from wall.
Difficult to line up a few boards.
2/ unlike adhesive it has no grab so you need some elaborate way of
holding in position for 10 minutes.
3/ expensive - say £5 per board compared to 50p with adhesive.
4/ the last bit you mention about less messing about mixing plaster,
you are still gona need to do that to fill the joins. Adhesive can be
used to do that too at the same time all in one go.

madmax wrote:

Have you used it on 2.4 x 1.2 boards or is it just for the small, fit

Yup, I have used in on full sized boards once, although I tend to use it
more for fiddly jobs like lining cupboards in a loft conversion (i.e.
lots of odd angles and shapes). It comes into its own here since you are
often spending a fair amount of time measuring, marking out, and cutting
the boards, and the foam won't go off in the bucket like plaster based
adhesives will.

Downsides I forsee are
1/ foam continues to expand as it sets so board pushed out from wall.
Difficult to line up a few boards.

In this application (used sparingly) it does not seem to make any
difference. The expansion seems to push the foam sideways in the joint
rather than the board "out". Once you seat the board where you want it,
it seems to stay there.

2/ unlike adhesive it has no grab so you need some elaborate way of
holding in position for 10 minutes.

It actually has a moderate amount of grab (it is also *kin sticky!).
Obviously not so much of an issue on vertical boards, might be more so
if lining a ceiling in this way... (although I would not use either
technique for ceilings anyway).

3/ expensive - say £5 per board compared to 50p with adhesive.

The whole can costs less than 5 quid (the siroflex one from toolstation
for example) and will do many boards.

4/ the last bit you mention about less messing about mixing plaster,
you are still gona need to do that to fill the joins. Adhesive can be
used to do that too at the same time all in one go.

If you want to do them at the same time, then yes the real adhesive
would be better for this. The real joint filler compound even better
though.

The foam is slightly better at reducing sound transmission through the
lined wall.

I am not suggesting that foam should be a universal replacement for
adhesive in the dry lining industry - just that it has useful
applications here.

--
Cheers,

John.

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On Mon, 25 Jul 2005 12:56:30 +0100, John Rumm
wrote:

madmax wrote:


It actually has a moderate amount of grab (it is also *kin sticky!).

and messy to clean up

Obviously not so much of an issue on vertical boards, might be more so
if lining a ceiling in this way... (although I would not use either
technique for ceilings anyway).

of course not


3/ expensive - say £5 per board compared to 50p with adhesive.

The whole can costs less than 5 quid (the siroflex one from toolstation
for example) and will do many boards.

4/ the last bit you mention about less messing about mixing plaster,
you are still gona need to do that to fill the joins. Adhesive can be
used to do that too at the same time all in one go.

If you want to do them at the same time, then yes the real adhesive
would be better for this. The real joint filler compound even better
though.

When I was looking into it I read on a forum someone who said he did
it that way for a living covering X 100 mtrs a day etc. but thats not
relevent to amateurs I suppose.


The foam is slightly better at reducing sound transmission through the
lined wall.

good point, mechanical insulation!

I am not suggesting that foam should be a universal replacement for
adhesive in the dry lining industry - just that it has useful
applications here.

fair enuf!

M