I have a 1940's brick veneer house with a gas space heater with a
chimney. Above the picture rail in front of the chimney there is a
crack in the plaster about 18 inches long. I have patched and repaired
this crack 3 times in the last 10 years, but every winter when the
heater is on the crack re-appears and I get some bubbling of the
paintwork around that area. Obviously the heat is causing this to
happen, but strangely it only is affecting the top area near the
I have noticed that the plaster in that section is very thin in some
places and am now at a point where I would like to replace it with a
new piece of plasterboard.
Is there anything I need to put in front of the chimney after I remove
the old plaster and before I add the new plaster to reduce the heat
eminating from there? (I'm thinking of something like aluminium paper
Also any tips on how best to do this job would be appreciated.