What Are SIP Panels

The Future of Energy-Efficient Construction

How SIP Panels Work – Structural Insulated Panels Explained

Structural Insulated Panels (SIPs) are an advanced, high-performance building material designed to create airtight, highly insulated, and energy-efficient structures. Each SIP panel consists of three layers:

Outer Skins – Made from Oriented Strand Board (OSB) for strength and durability.
Insulating Core – High-density expanded polystyrene (EPS), polyurethane (PUR), or polyisocyanurate (PIR) for superior thermal efficiency.

How They Work in Construction:

SIPs are pre-cut and delivered ready to assemble, reducing on-site labour.
Panels interlock using a tongue-and-groove system, ensuring a seamless fit.
Once assembled, the structure is airtight, improving energy efficiency and reducing heating costs.

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SIP panels can be used for walls, floors, and roofs, making them ideal for new builds, extensions, and garden offices.

Why Choose SIPs Over Traditional Brick & Block?

Feature	SIP Panel Extensions	Traditional Brick & Block Extensions
Build Speed	Up to 60% faster	Slow due to weather delays, drying times, and complex labour
Energy Efficiency	Superior insulation, lower energy bills	Requires extra insulation layers, increasing costs
Labour Costs	Lower – Fewer trades needed	Higher – Requires multiple skilled tradespeople
Material Waste	Minimal – Factory precision-cut panels	High waste from bricks, mortar, and on-site cutting
Overall Cost	More cost-effective in the long term	Higher due to extended build time and extra materials

SIPs offer a faster, stronger, and more energy-efficient alternative to traditional building methods, making them perfect for modern, sustainable homes.

Technical Data & Performance Comparison Charts

Thermal Performance

SIP panels have a U-value as low as 0.13 W/m²K, exceeding UK building regulations for insulation.
Their continuous insulation reduces thermal bridging, minimising heat loss.

Structural Integrity

SIPs can support loads up to 6 times their own weight, making them incredibly strong.
Fire-resistant and weatherproof, they perform well in extreme conditions.