Acoustic plasterboard & soundproofing (AU): what works (and what doesn’t)

People search for acoustic plasterboard when they want quieter bedrooms, home theatres, offices, or multi-residential walls that don’t leak sound. The trap is thinking one sheet fixes everything. In reality, soundproofing is about building a complete system that reduces vibration and blocks air gaps.

What is acoustic plasterboard?

Acoustic plasterboard is designed to improve sound control compared to standard board. It typically has a denser core and is used as part of a wall/ceiling system to increase mass and reduce sound transmission.

Start here: shop acoustic plasterboard

Acoustic plasterboard

3 simple soundproofing upgrades that move the needle

1) Add insulation in the cavity

Even basic acoustic-rated insulation in the stud cavity can significantly reduce transmitted sound. Mass + absorption beats mass alone.

2) Decouple the wall or ceiling

Resilient channels or isolation systems reduce vibration transfer. This is often the difference between “a bit better” and “wow, that worked”.

3) Seal all gaps

Sound travels through air. If you leave gaps at the perimeter, power points, or penetrations, you’ll lose performance fast. Use appropriate sealants/gaskets as required.

Don’t forget the finishing materials

• Compounds & adhesives for taping and topping
• Screws & fasteners

FAQ

Is acoustic plasterboard worth it?

Yes, if you install it as part of a system (insulation + decoupling + sealing). If you’re only swapping one layer of board with no other changes, the improvement may be modest.

What’s better: double plasterboard or acoustic plasterboard?

Often, adding another layer increases mass and can be very effective. Acoustic board can also help. The right choice depends on the space, constraints and target performance.

Need help choosing a setup?

If you’re building in WA or SA and want help selecting materials for a quieter wall or ceiling, contact us and tell us the room type and what noise you’re trying to reduce.