I'm about to start cutting some cable chases in a wall that's going to
be painted, but when I last did this (a long time ago) I never managed
to fill the chase so it disappeared completely. This house is all lime
plaster and I don't know whether that makes it easier or harder to get
"perfect" filling.
How do you do it? Bonding+finish, sand/cement+filler, ... ?

wrote:

I'm about to start cutting some cable chases in a wall that's going to
be painted, but when I last did this (a long time ago) I never managed
to fill the chase so it disappeared completely.

What I've found works well is to fill it roughly (using the One Strike
filler mentioned in the ceiling thread) and then after that's dried I
"pack" it in with finger pressure, and re-fill the shallow dip with
screwfix plaster filler (in a frame gun cartridge) which I find gives a
very fine/hard/crisp finish.

This house is all lime plaster

Dunno whether the plaster filler would blend in, or stick out, from a
lime finish ...

On Tuesday, 28 November 2017 22:46:07 UTC, wrote:
I'm about to start cutting some cable chases in a wall that's going to
be painted, but when I last did this (a long time ago) I never managed
to fill the chase so it disappeared completely. This house is all lime
plaster and I don't know whether that makes it easier or harder to get
"perfect" filling.
How do you do it? Bonding+finish, sand/cement+filler, ... ?

I never permit a single grain of sand to remain above the wall surface. Overfill & sand is a guaranteed fail imho, though it seems to be popular. Do that and you can't help but end up with a flat result, after a number of goes that reduces as skill increases. If you want to match lime, use lime for the final layer.


NT

On 28/11/2017 22:46, wrote:
I'm about to start cutting some cable chases in a wall that's going to
be painted, but when I last did this (a long time ago) I never managed
to fill the chase so it disappeared completely. This house is all lime
plaster and I don't know whether that makes it easier or harder to get
"perfect" filling.
How do you do it? Bonding+finish, sand/cement+filler, ... ?

After you have chased the wall paint it with watered down PVA and let it
dry. Before filling paint it gain. This will help stop the existing
plaster sucking the moisture from the new plaster and help prevent
cracking.

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