Ivy: a natural insulator with plenty going for it

What if your wall turned green... and clever with it? No, we're not talking about technology, but about ivy, that climbing plant so often unloved, yet blessed with unsuspected natural insulating properties. As well as looking good, it can play a genuine part in saving energy. So how do you make the most of it without your house ending up looking like an ancient ruin? Here's everything you need to know.

Ivy, a natural insulator that grows all by itself (well, almost)

The magic of ivy is that it needs neither an automatic watering system nor a degree in thermal engineering. Once it has taken root, it looks after itself. But make no mistake: behind its wild appearance, ivy is a real thermal ally.

In summer, it creates natural shade and limits the heat absorbed by your walls, acting like a green air conditioner.

In winter, it forms a barrier against wind and heat loss.

The result? Lower heating and air conditioning needs, and therefore genuine energy savings

How do you make it work without turning your house into a jungle?

Yes, ivy climbs, it clings... and sometimes it works its way in. But don't panic: you can absolutely set boundaries for it.

Use a trellis or a free-standing structure

Don't let ivy attach itself directly to your façade. Fit a wooden or metal trellis 10 to 15 cm away from the wall. This lets air circulate and protects the materials. It also makes maintenance far easier!

Keep an eye on it, like a pet

A quick going-over with the secateurs twice a year and ivy stays exactly where you want it. Prune it back so it doesn't climb onto the roof or block the gutters.

Check the condition of the wall

Before letting your ivy spread, make sure your walls are sound and free of cracks. Otherwise it could work its way in, and there go your savings!

An eco-friendly, money-saving choice

Alongside its insulating power, ivy is good for biodiversity: it attracts pollinating insects and provides shelter for birds. And what do you get out of it? A green façade, natural thermal comfort and a healthy cut in your energy bills. Quite the winning combination, isn't it?

In short

• An effective natural insulator, in winter and in summer
• Easy to install with a trellis
• Eco-friendly, attractive and economical
• Light but regular maintenance required

Want to know more about insulation? Take a look at our article on 10 tips for insulating your home without any building work!