Skip to main content
CosyWall insulation reducing noise between internal walls

How CosyWall Insulation Can Be Used to Reduce Noise Between Internal Walls

Written by emdagency on . Posted in General Knowledge.

Noise is one of the most overlooked problems in New Zealand homes. Whether it’s a child watching TV in the next room, conversations carrying down the hallway, or traffic outside, unwanted sound can make it hard to relax. While many homes are insulated for warmth, internal walls are often left empty, which allows sound to travel easily between rooms. 

If you want to reduce noise between internal walls, CosyWall Insulation can help. Our blown insulation system doesn’t just keep your home warmer, it also makes it quieter. 

Why Sound Moves So Easily Between Rooms 

Most older New Zealand homes, and even many newer ones, don’t have insulation in the internal walls. These walls might have plasterboard and timber framing, but nothing inside to stop sound. 

That means everyday noises like talking, music, or appliances can pass through with little resistance. In homes with open-plan layouts, timber floors, or multiple bedrooms close together, this becomes even more noticeable. 

Who Benefits from Internal Wall Insulation 

Many people can benefit from reducing noise between internal walls. 

  • Parents with young children who nap during the day 
  • People working from home who need quiet to focus 
  • Households with different sleep schedules 
  • Shared homes or flatmates wanting more privacy 
  • Anyone who just prefers a calm and peaceful environment 
  • Even in small ways, a quieter home can help reduce stress and improve comfort. 

How CosyWall Insulation Works to Reduce Noise 

CosyWall Insulation is a dry fibre, blown insulation system. It’s made from glasswool and is installed into the wall cavity using a specialised blowing process. The fibres are packed in at a high density, completely filling the space inside the wall. 

This dense layer helps absorb sound and reduces the amount of noise that can pass from one room to another. It’s especially effective at blocking mid to high-frequency sounds like speech, music, and general household noise. 

While CosyWall is often used to insulate external walls for warmth, it also works very well in internal walls to reduce sound transfer. 

Installing Internal Wall Insulation 

Installing CosyWall into internal walls is straightforward. If the linings are already off, we can install insulation directly into the cavities as part of your renovation with our linings off method. If the linings are staying on, we can access the walls by drilling small holes and patching them afterwards. 

This process doesn’t require a full renovation and can usually be completed quickly. It’s a tidy job with minimal disruption.  

Pairing with Acoustic Panels for Even Better Results 

For homes where soundproofing is a bigger concern, CosyWall Insulation can be paired with acoustic panels. These panels are fixed to the surface of the wall and add another layer of sound absorption. 

While CosyWall doesn’t install acoustic panels ourselves, many of our customers choose to combine both solutions for added noise reduction.  

Talk to Us About Reducing Noise in Your Home 

If you’re tired of hearing everything through the walls, or you just want a little more quiet in your day, internal wall insulation could be the answer. 

CosyWall Insulation is a simple, effective way to reduce noise between internal walls and improve the comfort of your home. Contact us today to find out more or to get a free quote.