Kingspan GreenGuard GG300 XPS Insulation Board 1250 × 600mm – 120mm (Pack of 3, 2.25m²)
Kingspan GreenGuard GG300 XPS Insulation Board 1250 × 600mm – 120mm (Pack of 3, 2.25m²)In stock
Minimum order £400 ex VAT, free delivery in England · Mainland Wales & Scotland: minimum order £400 ex VAT + £40 + VAT delivery
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline. Full delivery rules
Spread the cost: pay in 3 with Klarna, PayPal or Shop Pay at checkout Subject to status.
Bulk orders? Call 03330 908479 or contact us for a bulk quote.
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Delivery
Minimum order £400 ex VAT, free delivery in England · Mainland Wales & Scotland: minimum order £400 ex VAT + £40 + VAT delivery · Full delivery rules
- Free delivery with forklift offload
- Minimum order £400 ex VAT on insulation, plasterboard & drylining
Minimum order applies: add £400.00 ex VAT of these items to reach the £400 ex VAT minimum order.
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline. Full delivery details · Urgent courier quote (extra charge) · 03330 908479
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- Genuine manufacturer stock
- Trade pricing, shown ex VAT
- Call 03330 908479 for bulk quotes
Kingspan GreenGuard GG300 is an XPS insulation board (extruded polystyrene (XPS)) for inverted roofs, heavy-duty floors and below-ground applications. It has a declared thermal conductivity of 0.033 W/mK and, at this thickness, a thermal resistance of 3.60 m²K/W according to the manufacturer's datasheet. Each pack contains 3 boards covering 2.25m².
Specifications
| Brand | Kingspan |
|---|---|
| Thickness | 120mm |
| Board size (L × W) | 1250 × 600mm |
| Material | Extruded polystyrene (XPS) |
| Thermal conductivity (λ) | 0.033 W/mK |
| Thermal resistance (R-value) | 3.60 m²K/W |
| Reaction to fire | Euroclass F |
| Product standard | BS EN 13164 |
| Boards per pack | 3 |
| Coverage per pack | 2.25m² |
| Sold as | Pack of 3 boards (2.25m²) |
Delivery
Free delivery to England on every order; minimum order £400 + VAT. Delivered by Moffett lorry (forklift offload); someone must be present to receive it.
Downloads & technical information
- Kingspan GreenGuard GG300 technical datasheet (PDF)
- Kingspan GreenGuard GG300 Declaration of Performance (PDF)
- Kingspan GreenGuard GG300 BBA certificate (PDF)
- Kingspan product page (manufacturer website)
See the full range of Kingspan insulation boards.
FAQs
Is the price per board or per pack?
The price shown is for one pack of 3 boards covering 2.25m².
How many do I need?
Divide the area to be covered (m²) by 2.25m² and round up, then allow around 10% extra for cutting and waste.
What are the delivery charges?
Free delivery to England on every order; minimum order £400 + VAT. Delivered by Moffett lorry (forklift offload); someone must be present to receive it. Delivered in England only. We do not deliver to Northern Ireland or the Scottish islands.
Where can I find U-values and installation guidance?
See the manufacturer documents linked in the Downloads & technical information section above, or contact our team for help.
Thickness & R-value table – this product: R 3.60 m²K/W
Thickness & R-value table – this product: R 3.60 m²K/W
Kingspan GreenGuard GG300 XPS Insulation Board – all 8 thicknesses we stock.
| Thickness | λ (W/mK) | R-value (m²K/W) |
|---|---|---|
| 30mm | 0.033 | 0.90 |
| 40mm | 0.033 | 1.20 |
| 50mm | 0.033 | 1.50 |
| 60mm | 0.033 | 1.80 |
| 80mm | 0.033 | 2.40 |
| 100mm | 0.033 | 3.00 |
| 120mm this product | 0.033 | 3.60 |
| 150mm | 0.033 | 4.50 |
R-value = thickness (m) ÷ thermal conductivity λ, using the λ declared for each product, rounded down to the nearest 0.05 m²K/W. Always check the manufacturer's declaration of performance and your U-value calculation for Building Regulations.
Delivery information
Delivery information
Minimum order £400 ex VAT. Free delivery in England. Mainland Wales and Scotland: £400 ex VAT minimum plus £40 + VAT delivery.
Insulation, plasterboard, drylining, ceilings, timber, aggregates and cement. Separately delivered ranges have separate minimums. Access panels and Evolution fixings have their own delivery rules.
Delivery timing depends on stock and location; contact us before ordering if your project has a deadline.
