Workshop
Start a discussion

The Bunnings Workshop community can help with your home improvement projects.

How to fix a large hump in plaster under window?

MichaelKuen
New Contributor

How to fix a large hump in plaster under window?

796B3E54-2343-43B8-B3D4-9176AD02C126.jpeg

DFA6EBB9-B0E6-45CE-A58D-883D1A7F6021.jpeg

34637D3D-D76C-47B3-9648-37E454B0EDA1.jpeg

   

I have been going through fixing cracks in the plaster around the house. One of them I noticed extra trouble applying the compound. I checked with a level and it is humped out by a considerable amount. What is the best solution here? How should I go about fixing this myself?

 

Please ignore the compound in the photo. It is very thin and has nothing to do with the hump. It is located under a window. Cheers!

EricL
Bunnings Team Member
Bunnings Team Member

Re: Large hump in plaster under window.

Hi @MichaelKuen

 

There are a few possibilities why the hump in your wall has occurred. It could be that the plasterboard has deformed due to long-term moisture damage. Water may have entered the window sill and has damaged the stud framing and window frame causing it to swell and deform under the plaster. Aging has caused the timber frame to shift causing irregularities in the wall.

 

Repairing it will require you to remove the plaster and examine what has happened to the framing. Once the framing has been repaired and leveled you will have to put new Gyprock CSR 2400 x 1200 x 10mm 2.88sqm Plasterboard RE onto the frame. 

 

Here is a handy step-by-step guide: How to plasterboard a stud wall

 

Let me tag our experienced members @tom_builds and @TedBear for their recommendations.

 

If you need further assistance, please let us know.

 

Eric

 

See something interesting? Give it the thumbs up!
Reply
Loading...
MichaelKuen
New Contributor

Re: Large hump in plaster under window.

Thank you again Eric! I will see what I can do.

Reply
Loading...

Why join the Bunnings Workshop community?

Workshop is a friendly place to learn, get ideas and find inspiration for your home improvement projects