Kingspan Kooltherm K15


High performance rigid Phenolic rainscreen insulation board

Rigid phenolic insulation for use behind rainscreen facade systems.

Successfully tested in differing façade systems to BS 8414-1: 2015 + A1: 2017, BS 8414-2: 2005 & BS 8414-2: 2015 + A1: 2017, in accordance with the performance criteria set out in BR 135.

Ideal for new build and refurbishment.

Unaffected by air infiltration. Resistant to the passage of water vapour.

In order to check availability and order Kingspan Kooltherm K15, a Kingspan Kooltherm K15 request form will need to be filled in so that we can pass the details on to Kingspan in order to check stock and/or source the products.

Product options


Availability Indicators

Kingspan Kooltherm K15 is a special request product. In order to check availability and lead times, the Kingspan Kooltherm K15 request form will need to be filled out and sent to Kingspan to check stock/and or source the products.

Kingspan reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times may vary.

  • Generally 1 to 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Delivery charges will be calculated at check-out. Please visit our Ordering From Us page for further details on minimum order levels and delivery charges. If you have any queries, please do not hesitate to contact me via our Contact Form or on 01903 899 898.

Product Application

Rainscreen cladding insulating board

Kingspans high performance phenolic foam board, Kooltherm K15, is suitable for use in rainscreen facade systems.

Product Make-up

Core: The core of Kingspan Kooltherm K15 Rainscreen Board is a premium performance rigid thermoset modified resin insulant.

Facings: Faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness25mm to 150mm 
Board Length2.4m 
Board Width1.2m 
Board EdgeSquare 

Product Performance

Thermal Conductivity0.022 W/mK (insulant thickness 25 – 44 mm)
0.021 W/mK (insulant thickness ≥ 45 mm)
Compressive Strength100 kPa at 10% compressionBS EN 826:2013
Nominal Density35 kg/m³ 

Product Variants

ProductThicknessThermal Resistancekg/m²
Kingspan K15 25mm25mm1.10 m²K/W1.22 kg/m²
Kingspan K15 30mm30mm1.35 m²K/W1.39 kg/m²
Kingspan K15 40mm40mm1.80 m²K/W1.74 kg/m²
Kingspan K15 50mm50mm2.35 m²K/W2.09 kg/m²
Kingspan K15 60mm60mm2.85 m²K/W2.44 kg/m²
Kingspan K15 70mm70mm3.30 m²K/W2.79 kg/m²
Kingspan K15 75mm75mm3.55 m²K/W2.97 kg/m²
Kingspan K15 80mm80mm3.80 m²K/W3.14 kg/m²
Kingspan K15 90mm90mm4.25 m²K/W3.49 kg/m²
Kingspan K15 100mm100mm4.75 m²K/W3.84 kg/m²
Kingspan K15 110mm110mm5.20 m²K/W4.19 kg/m²
Kingspan K15 120mm120mm5.70 m²K/W4.54 kg/m²
Kingspan K15 130mm130mm6.15 m²K/W4.76 kg/m²
Kingspan K15 140mm140mm6.65 m²K/W5.11 kg/m²
Kingspan K15 150mm150mm7.10 m²K/W5.68 kg/m²