Acoustic wall insulation price calculator
Enter the size of each wall you want quietened and get an indicative price. It takes about ten seconds, and you do not have to give us your details to see the number. For how the system works, see CosyWall wall insulation.
Price a wall
Your estimate appears on this page. If you want it in writing, the quote form opens underneath it.
Acoustic Wall Insulation Calculator
Enter the length and height of each wall in metres. Add as many walls as you need and we will total them to calculate the estimated cost for acoustic wall insulation.
*This is an estimate only and includes GST. A minimum charge applies to small jobs. For a formal written quote, fill in your details below.
Like a formal written quote? Enter your details and a Safe-R team member will be in touch.
Thanks. Your details have been sent to the Safe-R team and we’ll be in touch shortly with a formal written quote.
This estimate is based on installing CosyWall acoustic insulation at an installed R-Value of R2.2 into a 90mm timber frame wall cavity.
Please note, there are many factors that can impact the overall price, so this calculator should only be used as a ballpark indicator. We recommend contacting our team to arrange an insulation assessment of your property and provide an accurate quote.

What acoustic wall insulation costs
The walls worth doing are the ones between a living area and a bedroom, between two bedrooms, and around bathrooms.
It is priced on the area of the walls you choose, so you can do the rooms that need it and leave the rest. A minimum charge applies to small jobs. Wall sizes, construction and access all change the real job, so your installer confirms the final price after a site visit. Use the calculator above for an immediate estimate on your own walls.
Why homeowners choose CosyWall Acoustic.
The estimate is one thing. This is what stands behind it.
Installed since 2002
CosyWall has been going into New Zealand homes since 2002.
CodeMark certified
The CosyWall system holds certificate CMNZ70016.
50 year guarantee
Carried on the CosyWall system.
Priced by wall area
Do the one room that needs it, not the whole house.

What moves the price up or down.
The calculator gives you an indicative figure for the walls you enter. These are the things that shift it when your local installer prices the job properly.
Wall size, not house size
The estimate adds up the length and height of each wall you enter, so the size of the house does not come into it.
How many walls
Most homeowners start with one or two walls, the bedroom or the office, and add more later.
Wall construction
Cavity depth and framing affect how much product a wall takes.
Access
Furniture, fitted wardrobes and tight spaces add time to the installer’s quote.
Your linings stay on.
An internal wall is done from one side, through small holes in the plasterboard. It is a service call, not a renovation, and the room is usable again the same day.
1Prepare the wall
We drill small holes into the plasterboard, taking care that they can be easily repaired afterwards.
2Fill the cavity
CosyWall Acoustic is blown in with specialised equipment, filling the gaps and voids that let sound move through the wall.
3Repair the wall
We fill and sand every hole, so the wall is ready for a fresh coat of paint.
“Once we’ve completed the process you’ll never know we were there.”
Acoustic wall insulation cost questions.
The questions people ask before they book, answered plainly.
The calculator on this page gives an estimate including GST for the walls you choose. The walls worth doing are the ones between a living area and a bedroom, between two bedrooms, and around bathrooms. It is priced on wall area, so you can do the rooms that need it, and a minimum charge applies to small jobs. Wall sizes, construction and access all change the real job, so your installer confirms the final price after a site visit. Use the calculator on this page for an immediate estimate on your own walls.
No. CosyWall Acoustic is blown into the existing wall cavity through small holes drilled in the plasterboard. Every hole is filled and sanded afterwards, ready for a fresh coat of paint.
The ones with a room on each side that you want separated. Bedrooms next to a living area, a home office, a media room, a bathroom or laundry, and walls onto a hallway are the usual ones.
Filling the cavity slows sound moving between the rooms on either side of that wall. It reduces transfer rather than removing it, and the result depends on the wall construction, the doors and any gaps around them.
Yes. Thermal work goes in the external walls and acoustic in the internal ones, and the same installer can do both on the same visit.
Enter the wall dimensions, and once you have the estimate you can add your details on the same page. The Safe-R network installer for your region will contact you to arrange a quote.
Pricing something else?
Retrofit wall insulation calculator
Price insulating your external walls for warmth, by total floor area.
Blown ceiling insulation calculator
Price insulating your ceiling or roof space by total roof area.
CosyWall Acoustic
How acoustic insulation works in an internal wall, and where it is worth putting in.
Want your acoustic insulation quote in writing?
Use the calculator for the estimate, then add your details and the Safe-R installer for your region will be in touch to arrange a proper quote. You can also request an insulation quote directly from our team.
