Kingspan Insulation Thermaroof TR27 flat roof board Celotex Insulation

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

Product Information

General information about Kingspan Thermaroof TR27

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


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


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

Product Properties

Thickness 25mm to 160mm
Board Length 1.2m
Board Width 0.6m and 1.2m
Board Edge Square

Product Prices

Buy Kingspan Thermaroof TR26

Product ex-VAT inc-VAT
Kingspan Thermaroof TR27 25mm, 12 x 0.6x1.2m = 8.64m² £73.26 £87.91
Kingspan Thermaroof TR27 50mm, 6 x 1.2x1.2m = 8.64m² £119.22 £143.06
Kingspan Thermaroof TR27 100mm, 4 x 1.2x1.2m = 5.76m² £144.71 £173.65
Kingspan Thermaroof TR27 120mm, 4 x 1.2x1.2m = 5.76m² £173.61 £208.33

Limited stock of the most popular boards sizes may be held at some of our larger depots.

Where products need to be brought in from Kingspan, please allow approx. 1 week for delivery on stocked items and up to 3 weeks on made to order thicknesses. While Kingspan keep the majority of the popular thicknesses in stock, less popular thicknesses may carry a minimum order level.

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 my vary.

  • Generally 1 or 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

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.027 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 Strength 150 kPa at 10% compression BS / I.S. EN 826: 2013
Vapour Resistance > 300 MNs/gm BS / I.S. EN 12086: 2013
Nominal Density 32 kg/m³
Product Thickness Thermal Resistance kg/m²
Kingspan TR27 25mm 25mm 0.95 m²K/W 1.78 kg/m²
Kingspan TR27 50mm 50mm 1.90 m²K/W 2.55 kg/m²
Kingspan TR27 60mm 60mm 2.30 m²K/W 2.93 kg/m²
Kingspan TR27 70mm 70mm 2.65 m²K/W 3.23 kg/m²
Kingspan TR27 75mm 75mm 2.85 m²K/W 3.39 kg/m²
Kingspan TR27 80mm 80mm 3.20 m²K/W 3.55 kg/m²
Kingspan TR27 90mm 90mm 3.60 m²K/W 3.97 kg/m²
Kingspan TR27 100mm 100mm 4.00 m²K/W 4.30 kg/m²
Kingspan TR27 110mm 110mm 4.40 m²K/W 4.64 kg/m²
Kingspan TR27 120mm 120mm 5.00 m²K/W 4.97 kg/m²
Kingspan TR27 125mm 125mm 5.20 m²K/W 5.14 kg/m²
Kingspan TR27 130mm 130mm 5.40 m²K/W 5.31 kg/m²
Kingspan TR27 140mm 140mm 5.80 m²K/W 5.64 kg/m²
Kingspan TR27 150mm 150mm 6.25 m²K/W 5.90 kg/m²
Kingspan TR27 160mm 160mm 7.25 m²K/W 6.31 kg/m²

Product Certificates

Please visit the Kingspan website for product certificates.