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Thermazone Roofboard

Third party certifications:
  • BSI Kitemark

    Certificate type

  • BBA Agrément Certificate

    Certificate type

BMI Icopal

A polyisocyanurate rigid core board, for use with partially bonded traditional pour-and-roll systems and Icopal thermically-activated/ self-adhesive systems.

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+44 (0)843 224 7400 www.icopal.co.uk

Icopal Thermazone Roofboard consists of a CFC/ HCFC free polyisocyanurate rigid core faced on both sides with a mineralized glass tissue autohesively bonded to the insulation core during manufacture. Icopal Thermazone Roofboard is designed for use beneath traditional partially bonded built-up roofs and single-ply roofing systems, in a warm deck situation. The board is available as a 1200 x 600 mm board for use when bonding in hot bitumen in ‘pour & roll’ specifications, and as a 2400 x 1200 mm board for other applications.

General information
Specification data - Polyisocyanurate (PIR) foam boards
Product Reference

Thermazone Roofboard


Tapered 1:60 fall

25 mm

30 mm

40 mm

50 mm

60 mm

80 mm

90 mm

100 mm

120 mm

140 mm

160 mm

180 mm

Standard product features

Thermal conductivity:

  • 0.026 W/m.K (insulant thickness < 80 mm);
  • 0.025 W/m.K (insulant thickness 80–119 mm);
  • 0.024 W/m.K (insulant thickness > 120 mm).


PIR foam: 32 kg/m³ (nominal).

Compressive strength:

PIR foam: 150 kPa at 10% compression.

Board size:

  • Flat boards: 2400 x 1200; 1200 x 600 mm.
  • Tapered boards: 1200 x 1200 mm.

Minimum thickness:

25 mm.

Product Options


Boards are available tapered for cut-to-falls applications. Icopal Limited can offer a design service for cut-to-falls systems. Contact Icopal technical services for further information.

Third party certifications
  • British Standards Institution (BSI) - certficate : Rigid polyisocyanurate foam (PIR) roofboard manufactured to BS 4841-3
  • Certificate: 15/5253 : Icopal Insulation
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