Top 5 insulation materials for energy-efficient homes in Belgium

In the face of the ongoing energy crisis, homeowners are increasingly looking for ways to make their homes more energy-efficient. Insulating your home not only reduces your gas and electricity bills but also significantly boosts comfort levels. Let’s delve into the top insulation materials currently trending in the Belgian market.


Glass Wool: The Time-Tested Choice

Glass wool, or fiberglass, stands out as the most recognized thermal insulator. Its popularity isn’t surprising given its resilience against pests like rodents. Moreover, it remains effective even in highly humid conditions. Available in convenient rolls or panels, it’s user-friendly and easy to install.

Rock Wool: The Volcanic Solution

Derived from volcanic rocks known for their superior insulating properties, rock wool is another favorite. It offers both thermal and acoustic insulation. Ideal for insulating attics and walls, its fire-resistant nature and ability to repel all kinds of pests make it comparable to glass wool in terms of benefits.

Hemp: The Eco-friendly Trendsetter

Gaining traction in recent years, hemp is now a sought-after insulator. Available in rigid panels or loose-fill, this 100% natural, biodegradable, and renewable material boasts excellent thermal phase-shifting capabilities. In simpler terms, hemp excels in retaining heat, making it a top choice for those aiming for maximum energy efficiency.

Flax: The Green Insulator

Another natural contender in the insulation arena is flax. It’s eco-friendly, devoid of any adverse environmental impacts, and offers successful thermal insulation. By choosing flax, homeowners can ensure effective insulation while minimizing their carbon footprint, as it doesn’t require intensive industrial processes.

Wood Wool: The Recycled Option

Wood wool is also worth considering. A high-performing thermal insulator, it’s produced from wood and recycled sawmill waste. Available as rigid panels or in bulk, it’s recommended for wall insulation. However, it’s less suitable for roof insulation due to its flammability in certain conditions and susceptibility to wood-eating insects or fungi.


Belgium’s focus on energy efficiency has led to a surge in demand for top-quality insulation materials. Whether you’re renovating an old home or constructing a new one, choosing the right insulation is crucial. From traditional options like glass wool to eco-friendly alternatives like hemp and flax, there’s a solution for every homeowner’s needs. By investing in quality insulation, you not only save on energy bills but also contribute to a sustainable and eco-friendly future.