I have remove an old airing cupboard from a bedroom. The plaster was
not existent. I put plasterboard over, thinking I could then skim on top
and make good. Sadly the plasterboard is well below the level of the
existing plaster, should I plaster with "undercoat plaster" to the level
required, or can I apply finishing plaster to a fair thickness?
TIA

In article ,
Broadback writes:
I have remove an old airing cupboard from a bedroom. The plaster was
not existent. I put plasterboard over, thinking I could then skim on top
and make good. Sadly the plasterboard is well below the level of the
existing plaster, should I plaster with "undercoat plaster" to the level
required,

Yes, bonding coat works fine on plasterboard.

or can I apply finishing plaster to a fair thickness?

Max thickness of one finish coat is going to be around 2mm.
I'm not aware of any limit on the number of such coats, but
several such coats could get you into cumulative errors in
the flatness of the wall, which would make polishing off
rather difficult.

--
Andrew Gabriel

"Andrew Gabriel" wrote in message
.. .
In article ,
Broadback writes:
I have remove an old airing cupboard from a bedroom. The plaster was
not existent. I put plasterboard over, thinking I could then skim on top
and make good. Sadly the plasterboard is well below the level of the
existing plaster, should I plaster with "undercoat plaster" to the level
required,

Yes, bonding coat works fine on plasterboard.

snip

Reminds me to ask a question that's been at the back of my mind for a
while....

What _is_ the difference between bonding and browning plasters? In what
circumstance should each be used?



--
Richard Sampson

mail me at
richard at olifant d-ot co do-t uk

In article ,
"RichardS" writes:
Reminds me to ask a question that's been at the back of my mind for a
while....

What _is_ the difference between bonding and browning plasters? In what
circumstance should each be used?

In theory, browning is for brick walls.
In practice, I think nearly everyone uses bonding coat nowadays,
which also contains a glue (as anyone who didn't wash it off their
tools before it set will confirm;-).
Some places no longer stock browning at all, and I've never used it.

See http://www.british-gypsum.com/immediacy-1331

--
Andrew Gabriel

Andrew Gabriel wrote:

In article ,
"RichardS" writes:
Reminds me to ask a question that's been at the back of my mind for a
while....

What _is_ the difference between bonding and browning plasters? In what
circumstance should each be used?

In theory, browning is for brick walls.
In practice, I think nearly everyone uses bonding coat nowadays,
which also contains a glue (as anyone who didn't wash it off their
tools before it set will confirm;-).
Some places no longer stock browning at all, and I've never used it.

See http://www.british-gypsum.com/immediacy-1331

Hmmn, B&Q charge more for browning than bonding. One of my plasterers says
bonding is stronger, another says no difference.

"Broadback" wrote in message
...
I have remove an old airing cupboard from a bedroom. The plaster was
not existent. I put plasterboard over, thinking I could then skim on top
and make good. Sadly the plasterboard is well below the level of the
existing plaster,

How far under. If 10mm use another sheet of plasterboard then skim, else
use bonding coat then skim.