Kingspan Thermataper TT44

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


Kingspan Thermataper TT44 is a tapered insulation with a fibre-free, rigid thermoset polyisocyanurate (PIR) core. It is suitable for flat roofs waterproofed with partially bonded torch applied multi-layer bituminous waterproofing.

Features and benefits:

  • 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 is 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


E20/200 Proprietary underslab 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)

0.026 W/m·K.

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.

0.025 W/m·K.

0.024 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.

Product Reference

Kingspan Thermataper TT44




Rigid thermoset fibre-free polyisocyanurate (PIR) insulant.

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