125mm Unilin Hyfloor Strip Foundation System

The 125mm Unilin Hyfloor Strip Foundation System delivers engineered floor insulation integrated with high-performance foundation riser panels constructed from medium-density block. This advanced system achieves the required U-Values and PSI value detailing, meeting the Future Homes Standard and passive floor performance requirements.

Installing premium insulation at the foundation stage of construction delivers substantial benefits. Precise detailing at the floor level establishes a foundation for thermal performance and installation quality across the entire building envelope. Optimising the floor assembly creates a standard for excellence throughout the construction process.

The 125mm Hyfloor Strip Foundation System satisfies Future Homes Standard compliance through its U-Value and Thermal Bridging performance whilst delivering the compressive strength required at foundation level.

Product Details

Product name: 125mm Hyfloor Strip foundation system

Type: Premium PIR insulation

Application: Walls

Thickness 100mm, 110mm, 125mm, 150mm

Inner facing: Foil facing

Outer facing: HIP facer

Thermal conductivity: 0.021 (W/mK)

Thermal Resistance: 0.11 – 0.13 W/m2k

Compressive strength: NPD

Size/Dimensions 1200 x 225mm / 1200 x 450mm

Reaction to fire: NPD

Installation: guide Please refer to marketing materials

EPD: An Environmental Product Declaration (EPD), certified by IGBC is available for this product. Please contact technical support for further details.

Key Highlights

1. Incorporates site detailing from the outset of the project.
2. Achieves impressive Y-Values of less than 0.05.
3. Boasts an exceptional lambda value of 0.021 W/mK.
4. Attains floor U-Values within the range of 0.11 to 0.13 W/m2K.
5. Utilizes blocks designed for multi-storey structures with remarkable compressive strength.
6. Adheres to standard construction Approved Construction Details (ACDs).
7. Follows a conventional construction approach, eliminating the necessity for engineering assurances.
8. Well-suited for integration with both built-in full-fill and partial-fill wall insulation solutions.

Thermal Bridging

Comparing an insulated foundation system with a traditional strip foundation requires straightforward heat loss assessment and performance comparison. The following evaluation method applies:

Determine the achieved U-Value for the floor assembly. Calculate the Psi value, representing heat loss at the wall and floor junction. Apply an appropriate f (temperature) factor to mitigate surface condensation and mould risk at skirting level. Generally, U-Values exceeding 0.15 W/m2K satisfy Future Homes Standard requirements. The resulting U-Value from specific floor insulation thickness depends on the floor's perimeter-to-area ratio (P/A). For example, approximately 150mm of the Hyfloor system typically delivers a U-Value between 0.11 and 0.13 W/m2K.

Info

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