The True Facts About Wall Insulation

When it comes to wall insulation, there are plenty of myths out there. Some people think it shrinks or breaks down over time. Others believe that wall insulation is wet and messy. At CosyWall Insulation, we hear these views often. So, we want to set the facts about wall insulation straight, especially for New Zealand homeowners. 

Here’s what you need to know. 

Wall insulation doesn’t shrink or slump 

Some people believe wall insulation settles over time and stops working. That might have been true for older insulation products, but not for blown insulation like CosyWall. 

CosyWall is made from dry glasswool and installed at a high density. It doesn’t slump or shrink inside your walls. Once it’s in, it stays there. It’s designed to perform for the life of your home and will not needs to be replaced or topped up. 

Heat pumps are helpful, but wall insulation does the heavy lifting 

Heat pumps are a popular heating option in New Zealand. They’re efficient and work well when used correctly. But without proper insulation, a lot of that heat escapes through the walls. 

Wall insulation helps form a thermal shell around your home. In winter, it slows heat from escaping. In summer, it keeps hot air out. This helps maintain a stable temperature inside your home all year round. 

What’s the better investment? 

A new heat pump might seem like a good option if you want to warm up your home. But if your walls aren’t insulated, that warmth doesn’t stay in the room for long. 

Wall insulation is a one-time cost that keeps delivering value. It improves comfort and helps reduce your energy bills. If you’re choosing between installing a heat pump or insulating your walls, start with the insulation. 

Wall insulation is dry, not foam 

Some people still think wall insulation is a wet spray foam. That’s not the case with CosyWall. 

CosyWall is a dry, blown-in glasswool insulation. It’s clean, safe, and contains no moisture. The installation process is tidy and doesn’t affect your wall linings or damage your home. 

It’s safe to breathe and safe for your home 

CosyWall insulation is made from up to 80 percent recycled glass. It’s non-toxic and safe to have in your home. It doesn’t give off fumes and won’t irritate your skin or lungs once installed. 

Because it’s moisture-resistant, it helps reduce the chance of mould and damp issues. This makes it a smart option for older homes or rooms where airflow is limited. 

Wall insulation isn’t required for rentals, but it’s still worth it 

New Zealand’s Healthy Homes Standards require ceiling and underfloor insulation for rental homes, but wall insulation isn’t compulsory yet. Even so, it can have a big impact. 

Uninsulated walls can be responsible for up to 25 percent of total heat loss in a home. That’s a big amount of energy going to waste. Adding wall insulation helps lock in heat and improve comfort. 

For landlords, it means offering a more desirable home to tenants. For tenants, it means lower power bills and a healthier place to live. 

It’s not as expensive as you think 

Many homeowners are surprised to learn that wall insulation is more affordable than expected. And because it helps reduce heating costs, it often pays for itself over time. 

Want to know how much it might cost to insulate your home? Use our online calculator or contact us for a free quote. 

Want to know more? 

If you’re thinking about insulating your walls, or you’ve heard something that doesn’t sound quite right, we’re happy to talk you through it. We’ve insulated thousands of New Zealand homes with CosyWall and we’re always here to help. 

Visit our website to learn more or book a free wall assessment. Understanding the facts about wall insulation is the first step to making your home warmer, drier, and easier to heat.