Stylite PassivHaus Insulated Foundation - Insulated Foundation System

Stylite PassivHaus Insulated Foundation is designed for ground floor foundation applications, using high density Expanded Polystyrene (EPS) combined with lower density flooring boards to form a modular insulated base for foundations. Manufactured to BS EN 13163:2012+A2:2016 under ISO 9001:2015 and ISO 14001:2015 accredited systems, it eliminates the critical wall-to-floor cold bridge in traditional foundations, reducing underfloor heat loss through rising walls from 65% to 12%.

The EPS units are designed to specific plot layouts and manufactured off-site. The system uses small pegs and clips for easy installation and is delivered ready to install.

All Stylite Passivehaus Foundations are made up of footing pieces and boards spread across the centre of the foundation. Different foundations will require different sized footings but generally, the boards comprise of standard flooring insulation at 2400 x 1200 mm at 100 and 200 mm thick. The EPS 300 footings are typically 1200 x 600 x 450 mm. The Height of the footing piece will typically be 450 mm high to accommodate the base layer, overlay and 150 mm of reinforced concrete topping.

Features and benefits:

• Eliminates the critical wall-to-floor cold bridge in traditional foundations.
• Resistant to moisture and rot.
• Available in a range of sizes and thicknesses to suit application.
• Pre-cut modular pieces.
• Save time and money on foundations.
• Requires 60% less concrete.
• No reduction in performance over time.
• Lightweight, quick & easy to install.
• Minimal water absorption & permeability.
• 100% recyclable.
• BRE Green Guide Rating of A+.
• Length Tolerance: L2.
• Width Tolerance: W2.
• Thickness Tolerance: T2.
• Flatness Tolerance: P5/P3.
• Squareness: S2.

Expanded Polystyrene is rot proof, Expanded Polystyrene is not affected by bacteria, moulds or fungi, and will not provide nutrient value for insects or vermin. Expanded Polystyrene does not lose any performance over time and will remain an effective insulation for the life of the building.

Stylite Expanded Polystyrene is hydrophobic and highly resistant to the absorption of water but will allow a very minimal amount of water vapour transfer. Expanded Polystyrene is often utilised with a suitable damp proof membrane or vapour control layer to avoid any unwanted water ingress.

Expanded Polystyrene will achieve reaction to fire Euroclass F. However, the system classification achieved when installed within a building will generally be considerably better due to use of other construction materials. We also supply FRA grades which contain a Fire Retardant Additive and achieve reaction to fire Euroclass E.

The Stylite Expanded Polystyrene does not contain HFC’s, CFC’s or HCFC’s. Expanded Polystyrene has a Global Warming Potential (GWP) of zero and a low O-Zone Depletion Potential (ODP). Expanded Polystyrene is 100% recyclable.