Kingspan Thermaroof TR27


High performance rigid Polyisocyanurate (PIR) flat roof insulation board

Can be used on flat roofs with fully adhered single-ply, partially bonded built-up felt, mastic asphalt, and cold liquid waterproofing.

Fully compatible with single–ply non–bituminous membranes that are fully bonded with solvent based adhesive systems.

Fully compatible with most bitumen based and mastic asphalt waterproofing systems.

Compatible with most green roof systems.

Ideal for new build and refurbishment.

Resistant to the passage of water vapour.

Thicknesses and Availability:

Available in most popular thicknesses from the manufacturer; short lead-times apply as we may need to get the products in from Kingspan before delivering to site.

This Thermaroof Range includes the following readily available product thicknesses: 25mm, 50mm, 80mm, 100mm, 120mm, 130mm, 140mm and 150mm.

The following thicknesses are manufactured to order: 70mm, 75mm, 90mm, 110mm and 160mm; these may carry minimum order levels.


Product options


Availability Indicators

Kingspan Thermaroof TR27 is sent out from depots nationwide and is subject to the Local Depot Delivery minimum order levels and delivery charge thresholds.

Limited stock of the most popular boards sizes may be held at some of our larger depots, and thus, available on shorter lead times than the availability rating suggests.

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

Flat roof insulating board

Kingspans high performance polyisocyanurate (PIR) foam board, Thermaroof TR27, is suitable for use in flat roofs waterproofed with fully adhered single-ply membranes, partially bonded built-up felt, mastic asphalt and cold liquid applied waterproofing applications.

Product Make-up

Core: Kingspan Thermaroof TR27 is manufactured with Nilflam technology, a high performance fibre–free rigid thermoset polyisocyanurate (PIR) insulant.

Facings: Faced on both sides with a coated glass tissue, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness25mm to 160mm 
Board Length1.2m 
Board Width0.6m and 1.2m 
Board EdgeSquare 

Product Performance

Thermal Conductivity0.027 W/mK (insulant thickness > 80 mm)
0.025 W/mK (insulant thickness 80 – 119 mm)
0.024 W/mK (insulant thickness ≥ 120 mm) W/mK
Compressive Strength150 kPa at 10% compressionBS / I.S. EN 826: 2013
Vapour Resistance> 300 MNs/gmBS / I.S. EN 12086: 2013
Nominal Density32 kg/m³ 

Product Variants

ProductThicknessThermal Resistancekg/m²
Kingspan TR27 25mm25mm0.95 m²K/W1.78 kg/m²
Kingspan TR27 50mm50mm1.90 m²K/W2.55 kg/m²
Kingspan TR27 60mm60mm2.30 m²K/W2.93 kg/m²
Kingspan TR27 70mm70mm2.65 m²K/W3.23 kg/m²
Kingspan TR27 75mm75mm2.85 m²K/W3.39 kg/m²
Kingspan TR27 80mm80mm3.20 m²K/W3.55 kg/m²
Kingspan TR27 90mm90mm3.60 m²K/W3.97 kg/m²
Kingspan TR27 100mm100mm4.00 m²K/W4.30 kg/m²
Kingspan TR27 110mm110mm4.40 m²K/W4.64 kg/m²
Kingspan TR27 120mm120mm5.00 m²K/W4.97 kg/m²
Kingspan TR27 125mm125mm5.20 m²K/W5.14 kg/m²
Kingspan TR27 130mm130mm5.40 m²K/W5.31 kg/m²
Kingspan TR27 140mm140mm5.80 m²K/W5.64 kg/m²
Kingspan TR27 150mm150mm6.25 m²K/W5.90 kg/m²
Kingspan TR27 160mm160mm7.25 m²K/W6.31 kg/m²