Best product for plaster board repair?

[sol26]

Hi all,
I am midway through a project to put my LCD onto a plasterboard wall (dot &dab) which is secured to a breeze block wall behind it.
I have cut out the channels and put in all my required cables, I'm a little unsure of what the best product is to use to fill/repair the channels. The channels are approx 25mm deep and about 40mm wide, I was going to use standard filler till I realised it will all just gloop into the voids behind the plasterboard!!
any suggestions much appreciated.

[RobJackson85]

Hmm - maybe cut small strips of plasterboard and slowly build them up to the required depth, then fill in the gaps. Its quite a tough job of filling holes in plasterboard.

[sol26]

only problem with that is the total depth is 25mm but its substantially less than that where the cables are.

Polycell do a plaster repair filler, has anyone used this?

[27neth]

use a tin of expanding foam. When it dries break some off until it is just below the plaster surface then cover with standard polyfilla.

john.

[sol26]

Thanks John. I did think about that but i thought that the filler would crack or come loose once on top of the foam when dry . How solid does the foam set??

[27neth]

Hi,
The foam sets very well, you can hold windows and door frames in with it You could put a flexible filler on top but i would say standard filler would be fine.

John.

[Badger0-0]

I'd go along with the foam

Then fill it to just below the surface, allow to properly dry (and yes it may crack) and then skim and sand to finish.

[sol26]

t.b.f thinking about it , its not to bigger issue if it cracks as it will be getting wallpapered over! Off to B&Q in the morning then and buy myself a tin of foam. how far does a tin go, bearing in mind i have about 13ft of channels to fill!?

thanks

[27neth]

It goes a long way, be very careful with it. Dont try to break it off until it is fully cured. it is a absolute pain to wash of your hands
It does expand a lot, one tin will do it, just dont get carried away by spraying a lot in the channel.
I would also masking tape your skirting boards and carpets underneath where you are filling and wear the provided gloves

John.

[sol26]

ok , thanks for the advice

[Badger0-0]

Originally Posted by 27neth

It goes a long way, be very careful with it. Dont try to break it off until it is fully cured. it is a absolute pain to wash of your hands
It does expand a lot, one tin will do it, just dont get carried away by spraying a lot in the channel.
I would also masking tape your skirting boards and carpets underneath where you are filling and wear the provided gloves

John.

All good advice, IMO

I'm just reaffirming that it expands a lot.

Spray a small blob first to get an idea

[RobJackson85]

Originally Posted by sol26

only problem with that is the total depth is 25mm but its substantially less than that where the cables are.

Polycell do a plaster repair filler, has anyone used this?

I forgot about that bit! The expanding foam will certainly do the trick, but as mentioned above expands alot!

It's also a real pain to clean off! Whether it be your hands, wall or any textile surface. Make sure you use the supplied gloves, or if handy a pair of marigolds as the gloves that are supplied tend to be abit on the small size.

[Badger0-0]

Originally Posted by sol26

t.b.f thinking about it , its not to bigger issue if it cracks as it will be getting wallpapered over! Off to B&Q in the morning then and buy myself a tin of foam. how far does a tin go, bearing in mind i have about 13ft of channels to fill!?

thanks

You could always do what a cheapskate mate of mine did (to be fair, times were hard 27 years ago).

Masking tape and then wallpapered over it

To be fair, it actually looked ok

[27neth]

As a few people have said its a pain to remove from your hands. The last time i had it on my hands i had to clean it off with petrol and sharp sand (on a building site) soap does not work....

john.

[rude-dog]

i've just done this but i used some dry wall, and just mixed it really thick. it worked a treat.