How Posi-Joists Reduce Energy Costs

Insulation Enhancement

The open-web construction of posi-joists allows for easy and effective installation of insulation. Insulation is key to maintaining consistent indoor temperatures by minimising heat transfer between the interior and exterior of a home. With posi-joists, there's ample space to fit insulation snugly between the joists, reducing heat loss or gain and enhancing overall thermal performance. 

Reduced Thermal Bridging

Unlike traditional solid timber joists that can create thermal bridges (areas where heat can pass through more easily) leading to energy inefficiencies, posi-joists minimise this issue. The metal web design significantly lowers thermal bridging, helping to maintain a more stable temperature within the building envelope. This means less reliance on heating and cooling systems to regulate indoor climate, resulting in energy savings over time.

Integration of Services

Posi-joists offer a versatile framework for integrating various utilities within the floor or roof structure. This streamlined approach to accommodating plumbing, electrical wiring and HVAC (Heating, Ventilation, and Air Conditioning) systems enhances efficiency in service installation. Properly designed and placed services minimise energy consumption, contributing to the overall energy-efficient design of the home.

Precision Engineering

Engineered to precise specifications, posi-joists ensure dimensional accuracy and consistency. This precision enables better-fitting insulation and building materials, reducing gaps that could compromise energy efficiency. The standardised design and high-quality construction further contribute to optimal energy performance.

Sustainability and Construction Speed

Posi-joists boast a high strength-to-weight ratio, allowing for longer spans and reduced material usage. This efficient use of materials not only enhances the structural integrity of the home but also contributes to sustainability by minimising resource consumption. Additionally, their lightweight nature facilitates faster construction times, reducing labour costs and the environmental impact associated with prolonged construction periods.


In conclusion, the use of posi-joists in residential construction is a game-changer for energy efficiency. Their innovative design, coupled with insulation capabilities, reduced thermal bridging and facilitation of service integration make them a valuable asset in creating homes that are not only structurally sound but also energy-efficient and environmentally friendly.

By incorporating posi-joists into building designs, homeowners can enjoy reduced energy bills, increased comfort and a smaller carbon footprint. As the push for sustainable living grows stronger, these engineered joists stand tall as a crucial component in the construction of energy-efficient homes.

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