How to patch kitchen plasterboard?

sudipto

Hello everyone,

I am a newbie in this area so looking for some help and advice from the many experts here.

Doing some kitchen plasterboard replacement work due to kitchen renovation.

Bought gyprock aquacheck plasterboard 10mm for this.

But when I compare the thickness of existing plasterboard with new, I am getting doubts if it's same.. attached image of existing plasterboard. Looks like 11mm. Am I overthinking here? I know there is no 11mm plasterboard. Maybe there is a layer of paint on it making it look thicker? As I am doing it first time, want to make sure, don't want the plasterboard uneven.

And to do the work, things I would need are:

Drill driver

Plasterboard screws 6gx30mm 

Stud adhesive 

Joint knife

Joint tape

Base coat

Do I need anything else?

I am trying to following this one: https://www.bunnings.com.au/diy-advice/diy-skills/repairing/how-to-repair-a-large-hole-in-plasterboard

Thanks in advance. The community has really helped me to do it on my own.🙏

MitchellMc

Welcome to the Bunnings Workshop community @sudipto. It's sensational to have you join us, and many thanks for your question about plasterboard.

You're definitely on the right track, and it's great to see you doing your research before jumping into the project. A few layers of paint can certainly make plasterboard appear thicker than it actually is, especially in a kitchen where multiple repaints are common. It's also possible that the existing board has swollen slightly over time, particularly if there’s been any exposure to moisture. That could explain why it looks closer to 11mm, even though 10mm is the standard.

If you're replacing a large section of the wall, this slight difference in thickness shouldn't be an issue. You’ll only have one transition between the old and new plasterboard, and that can easily be feathered out with joint compound to create a smooth and even surface. However, if you’re doing several small patch repairs, you might need to apply a skim coat of compound over the new sections to build them up to the same level as the surrounding wall. Once dry, you can sand it back for a flush finish.

Your list of tools and materials looks solid. You might also want to add a topping compound for a smoother finish over the base coat, a sanding block or pole sander to help with blending, and a dust mask for safety while sanding.

Also, remember that asbestos was commonly used in older houses. If you encounter any cement sheets or sheeting that you can not identify, it's best to have them checked before beginning work.

Please let me know if you have any questions.

Mitchell