How do I repair a crack in the cornice
Hi @Blacktown,
Welcome to the Bunnings Workshop community, it is wonderful to have you with us.
The repair really comes down to the severity of the crack. It may just require a skim with some topping compound, a quick sand and some paint to conceal a small crack, or it could involve V grooving the crack and filling it with base coat and taping it before skimming, sanding and painting, or it could be severe enough that it would warrant removing and replacing the cornice altogether.
If you could upload a photo of the damage to your cornice, it would help us to give advice that is specific to your circumstances.
Let me know if you require any assistance with uploading images. I am happy to help.
Jacob
Due to the depth of those cracks, typically, you would need to use base compound and tape to stabilise and cover them, however due to the proximity to the end of the cornice, it would be difficult, bordering on impossible to blend the repair in because of the thickness of the tape.
For this reason, I think the best approach is to cut out and replace the damaged lengths of cornice.
Check out https://www.bunnings.com.au/diy-advice/home-improvement/walls/how-to-cut-and-install-cornice for some guidance on how to do this.
If that approach seems too difficult, you could likely get away with using a utility knife, ensuring you wear gloves and long sleeved work clothes while doing so, to V-groove the cracks, then fill them with a filler such as this https://www.bunnings.com.au/uni-pro-500g-multi-purpose-interior-filler-500g_p1210281 , allowing it to dry, giving it a light sand then painting. This repair would help to fill the existing cracks, however it would not stabilise the cornice, so if further movement occurs, the cracks may open up further.
Ultimately, the choice is yours, but the replacement option will be better long term.
Let me know what you think and if you have further questions, please don't hesitate to ask.
