Modular Climate-Positive Timber & Straw Construction System

HALM GmbH specializes in prefabricated timber shell construction with straw infill, creating modular building systems designed for climate-positive residential development. By combining renewable, regenerative materials with precision prefabrication, HALM delivers high-performance building envelopes that store carbon, improve energy efficiency, and enable rapid on-site assembly.

The system integrates:

• Timber structures from sustainable sources
• Straw as a natural, carbon-storing insulation material
• High energy-performance building envelopes
• Modular and scalable construction methods
• Efficient, low-emission prefabrication processes

Beyond new builds, HALM focuses strongly on serial retrofitting, providing affordable and scalable solutions to decarbonize existing buildings — a key challenge in the European building sector.

To strengthen regional sustainable construction value chains, HALM is also developing infrastructure such as a straw rebaling system to supply certified straw bales across northern Germany, reinforcing local, circular material cycles.

HALM’s construction system actively stores carbon, reduces embodied emissions, supports circular material use, and contributes to the Bauwende — the transformation toward regenerative and climate-responsible building practices.