BecoWallform insulated concrete formwork

Practical, energy-efficient construction to accommodate our future needs, BecoWallform insulated concrete formwork (ICF) is designed to offer a range of performance standards to suit all self build applications.

This monolithic, ICF building system is quick to construct yet offers levels of performance significantly better than available from slower, more traditional approaches to building.

BecoWallform is based on large hollow lightweight block components that lock together without intermediate bedding materials to provide a formwork system into which concrete is poured. Once set, the concrete becomes a high strength structure and the formwork remains in place as thermal insulation, with U-values down to 0.11W/m²k — ideal for zero-energy buildings.

There is a range of concrete core thicknesses for different structural applications and the connecting ties in the wallblocks may be integral insulation or steel to suit the individual project specification.

The building process is quick, tidy and precise, with lower labour and equipment requirements than alternative methods. Creative design is encouraged by the availability of a comprehensive range of components to provide a home that is comfortable, energy efficient, storm and flood resilient, and built to last.

Wallform 313

The Wallform 313 ICF system is a practical solution for self builders seeking to meet the new UK Building Regulations with ease. Offering a U-value of 0.18W/m²K, Wallform 313 delivers excellent standards for thermal performance, ensuring homes are highly energy-efficient and cost-effective to run.

This exceptional thermal insulation is achieved through its unique combination of expanded polystyrene (EPS) panels and a solid concrete core, delivering both structural strength and superior energy efficiency. For self builders aiming to reduce their carbon footprint while enjoying a high level of comfort, Wallform 313 is the ideal choice.

The system's fast and straightforward construction process makes it particularly attractive to those managing their own projects. Wallform’s interlocking components are easy to assemble, reducing build time and minimising waste onsite.

Once the wallblocks are filled with concrete, they create a robust, airtight structure with exceptional thermal mass, helping to regulate indoor temperatures naturally.

In addition to meeting Part L requirements for energy performance, Wallform 313 provides excellent sound insulation and durability, making it well-suited for modern living.

Wallform 375 and 438

The Wallform 375 and 438 ICF systems are the ultimate choice for self builders aiming to build to Passivhaus standards. With U-values of 0.14W/m²K (Wallform 375) and 0.11W/m²K (Wallform 438), these systems deliver unparalleled thermal performance, ensuring exceptional energy efficiency and ultra-low to zero heating demands.

Both systems are certified as Passivhaus compatible components by the German Passivhaus Institute, confirming their suitability for the most stringent energy-efficient building requirements.

What sets Wallform 375 and 438 apart is their elimination of thermal bridging, with PSI values [a measure of heat loss at junctions in the building, such as between the wall and a window frame] among the lowest of any building system currently available. This dramatically reduces heat loss at junctions, ensuring a consistent internal environment and helping homeowners achieve maximum energy savings.

The systems’ design, combining expanded polystyrene (EPS) insulation and a concrete core, creates a highly airtight, robust structure that maintains internal temperatures year-round with minimal energy input.

For self builders pursuing net-zero or ultra-low-energy homes, Wallform 375 and 438 provide an easy-to-install, sustainable solution that simplifies the path to Passivhaus living. These systems not only help reduce operational carbon significantly but also offer long-term comfort, durability, and protection from rising energy costs — perfect for future-proofing your home.

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