Plastering chases

crystal ball · 10 Feb 2020

Its along time since I was involved in plastering chases, I looked at a nice easy job today which will need making good, looks like I will have to do it. What is the best plaster on the market now, I used to use board finish, or bonding back in the day

Robin0577 · 10 Feb 2020

I usually use Thistle One Coat for making good. Professional plasterers will no doubt say it's useless stuff, and for plastering a whole wall it is, but for repair work it's good because you can fill deep chases without sag like you can with bonding but it has a much smoother finish than bonding. It also has a much longer working time than "proper" plaster.

RF Lighting · 11 Feb 2020

I like to use standard gypsum browning or undercoat plaster for the first layer and then gypsum easy filler for the top coat and then sand it back with 120 grit sandpaper on a flat sanding block once it’s fully dried.

Be careful that you don’t buy gypsum easifill which is a different product and is much harder to sand back to a good finish

Taylortwocities · 11 Feb 2020

Whssign

Taylortwocities
16 Jul 2016

What he said

I also recommend Easyfill 60 for most jobs like this. It sands down really smooth.

crystal ball · 11 Feb 2020

Easy fill 60 looks good, many thanks

studentspark · 12 Feb 2020

I was told never to use bonding if the other side of the wall is an outside wall - use sand and cement.

Only use Bonding if its an internal wall (for first fill) and no issues with damp.
Bonding expands and bubbles up if its a damp wall.

phatboy · 12 Feb 2020

I use Thistle Hardwall and then some multifinish, but if you just have 1 chase it would be a waste. If you have a load, then it's a sensible option.

Also found Hardwall excellent for fitting metal socket boxes, easier to get them straight than with screws.

securespark · 13 Feb 2020

I use finish over bonding. Polish the finish with a float trowel.

John D v2.0 · 15 Feb 2020

we use easyfill 60 for filling chases too, we had to put a lot of watery pva on first as the old plaster was super crumbly, but the easifill was great and easy to wash up.
we tried the knauf equivalent and had a lot of trouble getting a nice finish.

make sure to apply in 2 layers, the final layer is thin and can be sanded back as needed. make sure to throw the majoritty of the waste in the bin, dont wash it all away as it can set in the drain.

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Plastering chases

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