- 2. September 2025
PRODUCT DEEP DIVE: Insulation Filled Bricks
The challenge of creating energy-efficient buildings often requires rethinking traditional materials. In this edition of our Product Deep Dive series we explore insulation filled bricks, an innovative solution that enhances traditional masonry with advanced insulation properties. This solution is developed by EASI ZERo partners Leipfinger-Bader, Bollerup-Jensen and Fraunhofer Institute for Silicate Research ISC.
What are they?
Insulation filled bricks are bricks with hollow cavities, that are filled with insulation. This way they achieve excellent thermal insulation properties, eliminating the need for any additional insulating layers, while maintaining the durability of traditional masonry. While contemporary insulated bricks are usually filled with mineral fibres or timber fibres, the EASI ZERo project develops a novel approach with waterglass foam to further improve thermal insulation properties.
Applications
- External walls for new construction
- Structural walls with integrated thermal insulation
Environmental benefits
- Improved energy efficiency: Reduces thermal conductivity by approximately 5% compared to standard hollow bricks
- Resource optimization: Maximizes the insulation potential of existing brick geometry
These innovative bricks provide a comprehensive solution for energy-efficient wall construction, combining traditional masonry benefits with advanced thermal performance.
Watch the video
Watch the video to see the waterglass foam and the filled bricks up close!
In the Product Deep Dive series, we explore the different materials developed within the EASI ZERo project, as part of our initiative to create low-carbon solutions for energy-efficient building renovation. We discover what the products are, how they can be applied, and their environmental benefits.