Therma TR27

Therma T27 T47 Wedge

Insulation For Waterproofed Flat Roofs

Kingspan Therma TR27 is a high performance, fibre-free rigid thermoset insulation, faced on both sides with a coated glass tissue autohesively bonded to the insulation core during manufacture.

  • FM approved for Class 1 steel deck roof assemblies
  • Compatible with most green roof systems
  • Easy to handle and install

Product Data table
Specification Guide
Typical Constructions
Testing and Data Table
Thermal Conductivity (λ-Value) at 23oC 0.028 W/mK (Insulant Thickness < 80 mm)
0.026 W/mK (Insulant Thickness 80 - 119 mm)
0.025 W/mK (Insulant Thickness ≥120 mm)
Product Dimensions 2270 mm x 1200 mm (2.72 m2)
1200 mm x 1200 mm (1.44 m²)
600 mm x 1200 mm (0.72 m²)
Product Thickness 30, 40, 50, 60, 70, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 150 mm

Assumptions & Key

The λ–values and R–values detailed on this page are quoted in accordance with AS/NZS 4859.1:2018. Product R-values are calculated using the calculated λ50/90, not the declared value.

Product R-values

 Product Thickness   Product R-value
 30 mm  R1.05
 40 mm  R1.45
 50 mm  R1.80
 60 mm  R2.15
 70 mm  R2.55
 80 mm  R3.05
 85 mm  R3.25
 90 mm  R3.45
 95 mm  R3.65
 100 mm  R3.85
 110 mm  R4.25
 120 mm  R4.90
 125 mm  R5.10
 130 mm  R5.30
The roof insulation shall be Kingspan Therma TR27 ____ mm thick, comprising a CFC/HCFC-free and zero Ozone Depletion Potential (ODP) rigid thermoset insulation core with coated glass tissue facings on both sides, manufactured under a management system certified to ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 and ISO 50001:2011 by Kingspan Insulation Limited and shall be installed in accordance with the instructions issued by them.

Dense Concrete Deck with Suspended Ceiling

Construction Reference

Metal Deck With No Ceiling

Construction Reference

Green Roof Covering Metal Deck with No Ceiling

Construction Reference

Green Roof Dense Concrete Deck With Suspended Ceiling

Construction Reference

Management Standards

Standard Management System
ISO 9001:2015 Quality Management
ISO 14001:2015 Environmental Management
ISO 45001:2018 Health and Safety Management
ISO 50001:2011 Energy Management

Kingspan Therma TR27 are also manufactured to the highest standards in accordance with the requirements of:
Requirement Rigid polyisocyanurate (PIR) and polyurethane(PUR) products for building end–use applications
BS 4841-3 Specification for laminated boards (roofboards) with auto–adhesively or separately bonded facings for use as roof board thermal insulation under built–up bituminous roofing membranes
BS 4841-4 Specification for laminated boards (roofboards) with auto–adhesively or separately bonded facings for use as roofboard thermal insulation under single−ply roofing membranes

Spanning On Metal Decks

Trough Opening (mm) Minimum Insulant Thickness (mm)
≤75 25
76 - 100 30
101 - 125 35
126 - 150 40
151 - 175 45
176 - 200 50
201 - 225 55
226 - 250 60

Product Testing

Characteristic Standard Result
 Compressive Strength AS 2498.3 Typically exceeds 150 kPa at 10% compression
Water Vapour Resistance AS 2498.5 > 7 MN·s/g·m 

Fire Performance

Kingspan Therma TR27, when subjected to the British and Australian Standard fire test specified in the table below, will achieve the result shown, when waterproofed with a single–ply waterproofing membrane.
Test Result
BS 476-3: 2004
(External fire exposure roof test)
Dependent on single-ply membrane adopted
AS 1530.3
(Ignitability, Flame Spread, Heat Release, Smoke Release)
Spread of Flame Index: 0
Smoke Development Index: 1
AS 2122.1
(Flame Propagation AS 1366)

Kingspan Therma TR27, when subjected to the British Standard fire test, specified in the table below, will achieve the result shown when waterproofed with 3 layer built–up felt and a loading coat of 10 mm chippings. For specifications without the chippings please consult the manufacturer of the mineral surfaced cap sheet for their fire classification details.
Test Result
BS 476-3: 2004
(External fure exposure roof test)
FAA Rating

Further details on the fire performance of Kingspan Insulation products may be obtained from the Kingspan Insulation Technical Service.

Environmental Data Table

Recyclability Non-contaminated insulation site waste is recyclable, but there are currently no facilities in Australia to process returned material
Re-usability Re-usable if removed with care (long term of service expected)
Water Use No water used in Kingspan Insulation's manufacturing process
Blowing Agent Global Warming Potential (GWP) Manufactured with a blowing agent that has low GWP
Blowing Agent Ozone Depletion Potential (ODP) Manufactured with a CFC/HCFC-free blowing agent that has zero ODP
Packaging Contains 0% recycled product
Polythene wrap and EPS skids 100% recyclable

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