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Kingspan Thermataper TT47

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Kingspan Insulation

A high performance, rigid thermoset polyisocyanurate (PIR) tapered insulation board for use beneath mechanically fixed/fully adhered single-ply waterproofing, and partially bonded built-up felt and mastic asphalt flat roofing systems.

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A tapered version of Kingspan Thermaroof TR 27, Kingspan Thermataper TT47 board is designed for use beneath mechanically fixed or fully adhered single-ply non-bituminous roofing systems.

The Kingspan Thermataper range has been specifically designed to prevent water ponding, the most common cause of failure of flat roofs.

U-value calculations for the Kingspan Thermataper range incorporate BS EN ISO 6946: 1997- Annex C (Building Components and Building Elements). Annex C outlines the calculation procedure to determine the total thermal transmittance of tapered insulation - what is termed the 'Annex C U Value'.

It is CFC-/ HCFC- free and is manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP), achieves a BRE Green Guide rating of A.

Kingspan Thermataper TT47 is manufactured under a management system certified to ISO 9001: 2015 (Quality Management Systems. Requirements), ISO 14001: 2015 (Environmental Management Systems. Requirements), BS OHSAS 18001: 2007 (Occupational Health & Safety Management Systems. Requirements) and ISO 50001: 2011 (Energy Management Systems. Requirements with guidance for use).

It is also manufactured in accordance with the Harmonised Standard BS EN 13165: 2001 (Thermal insulation products for buildings- Factory made rigid polyurethane foam (PUR) products- Specification).

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

Thermataper TT47


Refer to manufacturer's literature or Technical Services department for details of available thicknesses.

Standard Falls

1 :30

1: 40

1: 60

1: 80

Standard product features

Board size:

  • Length: 1.2 m.
  • Width: 1.2 m.

Thermal conductivity:

  • <80 mm thickness: 0.026 W/m·K.
  • 80–119 mm thicknesses: 0.025 W/m·K.
  • ≥120 mm thicknesses: 0.024 W/m·K.


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

Fire performance:

Details on the fire performance of Kingspan Insulation products may be obtained from the Kingspan Insulation Technical Service Department.

Responsible sourcing:

Certified to BES 6001 (Framework Standard for the Responsible Sourcing of Construction Products) for boards produced at Kingspan Insulation’s Pembridge and Selby manufacturing facilities.

Third party certifications
  • BBA Approval Inspection Testing Certificate No 06/4372
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