Have been requested to skim a chimney breast. Removed old wall paper
and underneath was pretty rough with a paint satin/silk finish which
is generally hanging well on.
Can I just pva the area and skim, or should the paint be removed?
The wallpaper was happy to stay on, so will a skim coat?

Mike P

On 5 Dec, 16:12, Mike P mike@askme wrote:
Have been requested to skim a chimney breast. Removed old wall paper
and underneath was pretty rough with a paint satin/silk finish which
is generally hanging well on.
Can I just pva the area and skim, or should the paint be removed?
The wallpaper was happy to stay on, so will a skim coat?

Mike P

Dear Mike
Why replaster?
If you have to then use SBR not PVA as pva can re-emulsify
Put sbr in the mix as well as applying when it is still sticky
Chris

In article ,
writes:
On 5 Dec, 16:12, Mike P mike@askme wrote:
Have been requested to skim a chimney breast. Removed old wall paper
and underneath was pretty rough with a paint satin/silk finish which
is generally hanging well on.
Can I just pva the area and skim, or should the paint be removed?
The wallpaper was happy to stay on, so will a skim coat?

Providing the paint is not coming off, you can plaster over it
(onto a still tacky PVA layer). However, bear in mind that the
plaster will be heavy, wet, and hanging on the paintwork for
24 hours, and the paintwork will need to remain well-stuck through
that. People sometimes think wallpaper is stuck on really well and
plaster over it, only to find that keeping it damp for 24
hours and hanging the weight of plaster on it is actually a
really good way to strip off stubburn wallpaper in whole sheets;-)

Dear Mike
Why replaster?
If you have to then use SBR not PVA as pva can re-emulsify
Put sbr in the mix as well as applying when it is still sticky

PVA is fine with plaster. If there's enough moisture around to
reemulsify the PVA, you'll be greatful as it will aide removal
of the wrecked plaster ;-) Don't mix it in the plaster as it
can interfere with the subsequent bonding of new paint and other
finishes to the wall.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On 06 Dec 2007 00:29:01 GMT, (Andrew
Gabriel) wrote:

... In article ,
... writes:
... On 5 Dec, 16:12, Mike P mike@askme wrote:
... Have been requested to skim a chimney breast. Removed old wall paper
... and underneath was pretty rough with a paint satin/silk finish which
... is generally hanging well on.
... Can I just pva the area and skim, or should the paint be removed?
... The wallpaper was happy to stay on, so will a skim coat?
...
... Providing the paint is not coming off, you can plaster over it
... (onto a still tacky PVA layer). However, bear in mind that the
... plaster will be heavy, wet, and hanging on the paintwork for
... 24 hours, and the paintwork will need to remain well-stuck through
... that. People sometimes think wallpaper is stuck on really well and
... plaster over it, only to find that keeping it damp for 24
... hours and hanging the weight of plaster on it is actually a
... really good way to strip off stubburn wallpaper in whole sheets;-)
...
... Dear Mike
... Why replaster?
... If you have to then use SBR not PVA as pva can re-emulsify
... Put sbr in the mix as well as applying when it is still sticky
...
... PVA is fine with plaster. If there's enough moisture around to
... reemulsify the PVA, you'll be greatful as it will aide removal
... of the wrecked plaster ;-) Don't mix it in the plaster as it
... can interfere with the subsequent bonding of new paint and other
... finishes to the wall.

Thanks to all ............. I will ensure the surface is firm all over
and will scour it as well to provide more key and use PVA as usual.


Mike P