Kingspan Thermataper TT44-K

Suitable for use on new and existing roofs with timber or concrete decks.


Kingspan Thermataper TT44 tapered roof insulation combined with Kooltherm packer board for reduced overall thickness.

Features and benefits:

  • Potential thickness savings of 20–40 mm (dependent on the individual scheme and build-up, when compared with a full Polyisocyanurate (PIR) system).
  • No structural fall required.
  • For refurbishment applications, and can typically be installed above the existing roof surface (with a waterproof membrane).

Manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

Kingspan Thermataper TT44 tapered roof insulation and Kingspan Kooltherm packer board are both manufactured under a management system certified to ISO 9001: 2015 (Quality Management Systems. Requirements), ISO 14001: 2015 (Environmental Management Systems. Requirements),  ISO 45001: 2018 (Occupational Health and Safety Management Systems) and ISO 50001: 2011 (Energy Management Systems. Requirements with guidance for use).

General information

Uniclass 2015

Pr_25_71_63_66 Polyisocyanurate (PIR) foam boardsPrimary


J41/10 Built-up reinforced bitumen membrane warm deck roof covering

J41/420 Rigid urethane foam warm deck roof insulation

J42/10 Warm deck roof covering

J42/420 Rigid urethane foam warm deck roof insulation

Specification data - Polyisocyanurate (PIR) foam boards Enhanced data

Third party product certification

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.

Fire performance

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


Thermal conductivity (maximum)

Kingspan Thermataper TT44 (thickness): <80 mm: 0.026 W/m·K; 80–119mm: 0.025 W/m·K; ≥120 mm: 0.024 W/m·K. Kingspan Kooltherm packer board: 0.018 W/m·K.

Thickness (nominal)

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


Face size (length x width)

1200 x 600 mm.


Upper facing: Bitumen coated glass tissue finished with a thermofusible polypropylene fleece autohesively bonded to the insulation core. Lower facing: Mineralized glass tissue autohesively bonded to the insulation core

Kingspan Kooltherm packer board: Both sides with a glass tissue based facing, autohesively bonded to the insulation core.

Product Reference

Kingspan Thermataper TT44-K


Rigid thermoset fibre-free polyisocyanurate (PIR) insulant; Fibre-free rigid thermoset phenolic insulant.

Kingspan Thermataper TT44; Kingspan Kooltherm packer board. 

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