Kingspan GreenGuard Product Corner Kingspan GreenGuard Product Corner

Extruded polystyrene insulation

Kingspan GreenGuard GG300 is a high performance rigid extruded polystyrene insulation.

It offers thermal conductivities as low as 0.034 W/m·K, and is used to insulate inverted roofs, basements, car park decks, and heavy-duty commercial, industrial and cold store flooring.

Product brochures

Our product brochures include U-value tables, handling advice and installation guidance.

Kingspan GreenGuard Basements

Kingspan GreenGuard Inverted Roofs

Kingspan GreenGuard Heavy Duty Floors

Kingspan GreenGuard Car Park Decks

Technical & Downloads

Thermal conductivity (thickness of insulation) 0.034 W/m·K (30 - 150 mm)
0.036 W/m·K (> 150 mm)
Euroclass E (30 - 60 mm) 
F (> 60 mm)
Compressive strength 300 kPa (at 10% compression)
Core Kingspan GreenGuard GG300 is a high performance rigid extruded polystyrene insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)
Board size 1.25 x 0.6 metres (rebated)
Weight Approx 3.00 kg/m2 at a thickness of 100 mm


How can we help you?

How can we help you?

Net Zero Energy / Renewable Energy Kingspan GreenGuard is manufactured in our Selby facility. By the end of 2020, 100% of the non-renewable operational energy used in manufacturing processes in this site will be matched through the use of renewable energy and the purchase of renewable energy certificates (to offset any remaining non-renewable energy use). Visit our Net Zero Energy area to learn more.
Net Zero Carbon manufacturing Our groupwide aim is to achieve net zero carbon (CO2e) emissions (scope 1 & 2) from our manufacturing activities by the end of 2030. For more info, visit Planet Passionate
Waste to Landfill At Selby, we currently send 0% of our manufacturing waste to landfill. We are working to achieve total landfill diversion in the next year.
Our Planet Passionate goal is to send zero waste to landfill by 2030.
Kingspan GreenGuard® GG300 produced at Kingspan Insulation’s Selby, North Yorkshire manufacturing facility is manufactured under a management system certified to BS EN ISO 14001: 2015.
Planet Passionate
Through our new Planet Passionate 10-year groupwide sustainability programme, we aim to make significant advances in the sustainability of our business and of our products.

How can we help you?