Cold? Why Adding Wall Insulation is a Better Solution than Installing a New Heat Pump

When winter hits, and the temperature starts to drop you may start looking for ways to warm up your home. For some, the first thought is installing a new heat pump. But before you go down that track, it’s worth thinking about where your home might be losing heat in the first place. 

Adding wall insulation is one of the smartest ways to improve the warmth and comfort of your home. It works quietly in the background and keeps the heat in, right where you want it. 

Why Heat Escapes Without Wall Insulation 

Most homes built before the 1990s were not built with insulation in the external walls. Even homes built after that may have thin or patchy insulation that doesn’t do much to hold the heat in. If your walls are not insulated properly, a large amount of heat escapes straight through them. 

BRANZ research shows that uninsulated walls can account for up to 25 percent of heat loss in a home. That means one quarter of the heat you’re paying for is going straight out the wall. Even the best heat pump won’t solve this problem if the heat can’t stay in the room. 

What Wall Insulation Does 

Wall insulation slows the movement of heat. In winter, it stops heat from escaping through your walls. In summer, it helps block hot air from getting in. This creates a more stable temperature inside, which means you use less heating and cooling overall. 

The CosyWall system uses a dry, blown glasswool insulation that completely fills the wall cavity. It reaches into all the corners and gaps that traditional insulation can miss. Once it’s in, it works for the life of the home and requires no maintenance. 

Why Insulation is a Long-Term Fix 

A heat pump is one of the most energy efficient ways to heat your home, but it still relies on electricity to run. If your home isn’t well insulated, a lot of that heat will escape, meaning your heat pump must work harder and run longer to keep the space warm. That can lead to higher energy use and bigger power bills. 

Wall insulation helps stop that heat from escaping in the first place. It reduces how often you need to use your heat pump and helps it work more effectively. Once installed, insulation works year after year without needing any maintenance. There are no filters to clean, no parts to service, and no switches to turn on or off. It quietly does its job in the background, keeping your home warm and dry. 

Make Your Heating Work Better 

Even if you already have a heat pump, adding wall insulation can help it work more efficiently. When your walls are insulated, the warm air your heat pump creates stays inside longer. That means you won’t have to run the pump for as long or as often. Your home reaches the right temperature quicker and holds that warmth for longer. 

Think of insulation as giving your home a better “thermal shell”. It’s not about replacing your heating system but helping it perform better. 

What’s the Better Investment? Installing a New Heat Pump or Insulating Your Walls 

While both wall insulation and heat pumps are useful, insulation gives you long-term benefits that keep adding up. You pay once, and it keeps saving energy every day. It also adds to the value of your home and makes it more comfortable year-round. 

A new heat pump may still make sense for some homes, especially if you have no existing heating. But if you already have a heat source and your walls aren’t insulated, the better first step is clear. Insulate the walls and keep the heat in. 

Ready to Insulate Your Walls? 

If you’re thinking about making your home warmer and are interested in understanding the cost of installing wall insulation, try out our wall insulation calculator or feel free to give us a call on 0800 267 992.