Bit of help needed - plastering

ezra_

Hi,

New to the forum.

We are moving in to an old cottage (think famine era) and there are a few jobs that need to be done.

First of these is plastering over the old front door so we can re-jig the kichen layout. This is made complicated by the fact that I'm not allowed by SWMBO to remove the old door (character feature) so instead I'm putting up some plasterboard over the door frame on the interior.

I've put up some batons and started to tack on the plaster board. However, the batons are straight and I've left about a 4mm gap for the plaster. This drifts from 2mm to 8mm, as the plaster on the walls isn't straight.

There are also some damaged bits of plaster around the old door frame.

Finish doesn't have to be perfect on this as we are planning on putting a cooker / extractor into the space and so will tile over. However, I've not plastered before and was planning on putting some skim coat over the plasterboard and matching the lines of the wall where possible.

So tell me pls - what have I done / am planning to do wrong!

Jimmy_M

You haven't rang a plasterer
Ah no - i admire your get up and go...

It will still have to be relatively flat for the tiles to go on properly.
Ive done smaller areas in a bathroom where tiles were going on, but not as big as a door....
Im by no means an expert (beginner like yourself) and someone else will prob give you better advice. But in my case i brought the plasterboard out as level as possible and tiled directly onto it. I only used plaster in areas such as where the sink had been previously plastered around leaving a hollow in the wall - then i tiled over..

sky6

Put a coat of Bonding over the plaster board to level it all up for you. Then you can skim with plaster. Plaster shouldn't be any thicker than 3 mm otherwise it ill crack and lift,
Mix the bonding to something like a milky porridge consistency. Bonding unlike Plaster will allow you a little time to lay it on.
Plaster, when you lay it on the Wall you can use a straight edge to level it out. then just leave it alone until it's going black and hardening. Then you can trowel it over to a finish. Use a brush to sprinkle on a drop of water to help you work it to a polished finished.

ezra_

sky6 wrote: »

Put a coat of Bonding over the plaster board to level it all up for you. Then you can skim with plaster. Plaster shouldn't be any thicker than 3 mm otherwise it ill crack and lift,
Mix the bonding to something like a milky porridge consistency. Bonding unlike Plaster will allow you a little time to lay it on.
Plaster, when you lay it on the Wall you can use a straight edge to level it out. then just leave it alone until it's going black and hardening. Then you can trowel it over to a finish. Use a brush to sprinkle on a drop of water to help you work it to a polished finished.

Thanks Sky6,

So you are saying to use something like:
http://www.gyproc.ie/products/plasters/thistlebond-it

to build up on the board so at the end of the process, there will be a uniform gap of c. 2mm which will be skimmed over?

Does this bond negate the use of plastering tape when going over the join beteween two boards?

sky6

No just ordinary Gypsum Bonding. It's white and powdery a bit like Flour. It's about a tenner a bag. You're best to mix a little of it and try it out on a waste piece of board just to check the consistency of the mix and how it goes on. Then basically use it to level up your wall and then finish with plaster. The Bonding give you about 10 to 15 minutes to work with it unlike the plaster. Make sure you use a clean bucket to mix in and clean Water. The Bucket will wash out easily afterwards although don't put it down the sink or drain.

Thistle Bond is used over existing plaster or after you have taken tiles down and want to plaster again.

ezra_

sky6 wrote: »

No just ordinary Gypsum Bonding. It's white and powdery a bit like Flour. It's about a tenner a bag. You're best to mix a little of it and try it out on a waste piece of board just to check the consistency of the mix and how it goes on. Then basically use it to level up your wall and then finish with plaster. The Bonding give you about 10 to 15 minutes to work with it unlike the plaster. Make sure you use a clean bucket to mix in and clean Water. The Bucket will wash out easily afterwards although don't put it down the sink or drain.

Thistle Bond is used over existing plaster or after you have taken tiles down and want to plaster again.

Cheers - thanks for that.