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How do I repair damaged wall corner?

Hi everyone,

I’m hoping for some advice on how to repair this damaged corner of a wall (photo attached).

The plaster has chipped away quite deeply and you can see the rough material underneath. It’s right along the edge near a door frame, and the surface has a textured finish around it.

I’m not sure what materials I need or the best steps to fix it properly, especially to blend in the texture afterward.

Would I need to use something like a corner bead, or just patch it up with filler? Also, how would I match the texture once it’s repaired?

Any tips, product recommendations, or step-by-step instructions would be really appreciated. Thanks so much!

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JacobZ

Hi @MarlieBeena,

Welcome to the Bunnings Workshop community, it is fantastic to have you with us.

It looks like there are two separate products in use here, a cement-based mortar/render and a plaster topcoat. In terms of products, you could use this Dunlop Ardit Rapidset Repair Mortar to fill the bulk of the hole, then Hardwall Plaster over the top to finish and create the textured look before painting. There doesn't seem to be a bead, but you could use some mesh tape between the mortar and the plaster layer to help strengthen the patch.

Start by giving the hole a good clean out with a stiff-bristle brush and break off any loose pieces so that the subsurface is reasonably solid.

Once tidied, use a trowel to fill the hole with mortar, to just below the surface of the wall. Allow the mortar to dry and then apply some mesh tape over the top to help anchor the patch to the rest of the wall.

You can then apply a coat of hardwall plaster over the top to conceal the mesh tape, then allow this coat to dry.

It looks like a knock-down texture, which is achieved by using a Renderers Brush or something similar to flick specks of plaster onto the wall, allowing the specks to dry for around 10 minutes before smoothing and knocking them down with your trowel. If you search on YouTube for "How to knockdown texture", you will find a few examples.

Once dry, you can paint over the repair to blend everything in.

Let me know what you think and if you have further questions, please don't hesitate to ask.

Jacob

MarlieBeena

Thank you! Will give that a go.

Related to this too, how would you suggest preparing the same wall for painting if the paint on the same wall is

peeling and flaking?

MitchellMc

If the paint on the rest of the wall is deteriorating, then you may need further assessment, @MarlieBeena. You would typically take a metal scraper and start at the peeled area, then test how sound the surrounding paint is. If it chips away easily, then you should continue until you reach a well-bound and stable area. You might find that the rest of the paint simply wants to chip away. If that's the case, you need to decide whether you wish to remove all of it and start fresh or leave it as it is, fill the damaged area and paint over. How long that lasts is hard to determine, and removing the delaminating paint is generally the best option for a long-term fix.

If only this area has flaked off, and the rest of the paint is sound, you can use the Hardwall plaster to fill in the missing piece.

Please let me know if you have any questions.

Mitchell

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