The Passivehaus (Passive House) standard ensures a building is energy-efficient that slashes heating / cooling energy use by up to 90% compared to typical buildings. It creates an exceptional comfortable, healthy, indoor environment.

THE KEY PRINCIPLES ARE:-

Continuous Insulation: High-level insulation throughout the entire building envelope (walls, roof, floor) prevents heat transfer, keeping the home warm in winter and cool in summer.

Airtightness: Buildings are meticulously sealed (verified by a blower door test) to prevent heat loss and air infiltration, ensuring a comfortable, draught-free environment.

High-Performance Windows: Triple-glazed windows with insulated frames are used to minimize heat loss and maximize solar gain in winter.

Thermal Bridge-Free Design: Construction details eliminate weak points in the insulation, preventing cold spots that lead to energy loss and condensation.

Ventilation with Heat Recovery (MVHR): A continuous, mechanical ventilation system extracts stale, warm air and uses it to pre-heat incoming, fresh air, retaining over 80-90% of the heat.

Click To Download - The Passivehaus Principles

OUR ALTERNATIVE ECO & HIGH PERFORMANCE WALL SYSTEM 

To achieve the enhanced wall u-values needed for Passivhaus, we have an alternative wall solution instead of using a 38mm x 140mm stud with multiple layers of PIR insulation. Our suggestion is the "Larson" Twin Wall System that is fully filled with an eco insulation material. Two parallel vertical members are connected by plywood gussets, the inner (loadbearing) leaf is constructed using 38x140 cls timbers while the outer leaf is constructed using 38x63mm cls. timber.

Fixed to the outer 38x63 cls. leaf is a breathable 12mm MEDITIVE VENT sheet material, and membrane, this allows the wall to breathe. The inner leaf is fitted with 12.5mm PROPASSIVE sheet materials, all joints and junctions are taped (using an airtight tape) ensuring the house is airtight and draught free.