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Kingspan TR26 for Single Ply Waterproofing Flat Roofs

Kingspan TR26 Insulation for flat roofs waterproofed with partially bonded torch applied multi–layer bituminous waterproofing

Kingspan's popular polyisocyanurate products are available in most popular thickness’s from the manufacturer, in which case short lead-times apply. The most popular board sizes may be available from stock.

High performance Kingspan product, available in most popular thickness’s from the manufacturer, therefore short lead-times apply. This Thermaroof Range includes the following readily available product thicknesses 25mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 105mm, 120mm, 140mm and 150mm. Manufactured to order are the following thicknesses 30mm, 45mm, 55mm, 65mm, 75mm, 85mm, 95mm, 110mm, 115mm, 125mm, 130mm and 135mm

Product Applications

Insulation for flat roofs waterproofed with partially bonded torch applied multi–layer bituminous waterproofing

Common applications for this product include …
Between and Over Flat Roof Joists, plus Balconies and Terraces


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Click to Buy: Kingspan TR26 (ThermaRoof) Flat Roof Insulation Boards - Foil Faced = Both Sides

ThermaRoof TR26 is a foil faced insulation for flat roofs with mechanically fixed single-ply waterproofing



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Rarely requested product sourced directly, possibly manufactured to order.. Kingspan TR26 60mm, 5 x 1.2x2.4m = 14.4m² - ranging from £13.85 to £14.49 per m²

1 plus packs @ £14.49 per m² / £41.72 per board = £208.61 (£250.33 inc-VAT) per pack
3 plus packs @ £14.36 per m² / £41.35 per board = £206.77 (£248.12 inc-VAT) per pack
6 plus packs @ £14.23 per m² / £40.98 per board = £204.92 (£245.90 inc-VAT) per pack
8 plus packs @ £14.10 per m² / £40.61 per board = £203.07 (£243.68 inc-VAT) per pack
11 plus packs @ £13.97 per m² / £40.25 per board = £201.23 (£241.48 inc-VAT) per pack
14 plus packs @ £13.85 per m² / £39.88 per board = £199.38 (£239.26 inc-VAT) per pack

Rarely requested product sourced directly, possibly manufactured to order.. Kingspan TR26 70mm, 4 x 1.2x2.4m = 11.52m² - ranging from £16.23 to £16.98 per m²

1 plus packs @ £16.98 per m² / £48.92 per board = £195.66 (£234.79 inc-VAT) per pack
3 plus packs @ £16.83 per m² / £48.48 per board = £193.93 (£232.72 inc-VAT) per pack
6 plus packs @ £16.68 per m² / £48.05 per board = £192.20 (£230.64 inc-VAT) per pack
9 plus packs @ £16.53 per m² / £47.62 per board = £190.47 (£228.56 inc-VAT) per pack
12 plus packs @ £16.38 per m² / £47.18 per board = £188.73 (£226.48 inc-VAT) per pack
15 plus packs @ £16.23 per m² / £46.75 per board = £187.00 (£224.40 inc-VAT) per pack

Rarely requested product sourced directly, possibly manufactured to order.. Kingspan TR26 80mm, 4 x 1.2x2.4m = 11.52m² - ranging from £18.61 to £19.47 per m²

1 plus packs @ £19.47 per m² / £56.08 per board = £224.30 (£269.16 inc-VAT) per pack
3 plus packs @ £19.30 per m² / £55.58 per board = £222.31 (£266.77 inc-VAT) per pack
5 plus packs @ £19.13 per m² / £55.08 per board = £220.33 (£264.40 inc-VAT) per pack
8 plus packs @ £18.95 per m² / £54.59 per board = £218.34 (£262.01 inc-VAT) per pack
10 plus packs @ £18.78 per m² / £54.09 per board = £216.36 (£259.63 inc-VAT) per pack
13 plus packs @ £18.61 per m² / £53.59 per board = £214.37 (£257.24 inc-VAT) per pack

Rarely requested product sourced directly, possibly manufactured to order.. Kingspan TR26 100mm, 3 x 1.2x2.4m = 8.64m² - ranging from £22.71 to £23.77 per m²

1 plus packs @ £23.77 per m² / £68.44 per board = £205.33 (£246.40 inc-VAT) per pack
3 plus packs @ £23.55 per m² / £67.84 per board = £203.51 (£244.21 inc-VAT) per pack
6 plus packs @ £23.34 per m² / £67.23 per board = £201.69 (£242.03 inc-VAT) per pack
8 plus packs @ £23.13 per m² / £66.62 per board = £199.87 (£239.84 inc-VAT) per pack
11 plus packs @ £22.92 per m² / £66.02 per board = £198.06 (£237.67 inc-VAT) per pack
14 plus packs @ £22.71 per m² / £65.41 per board = £196.24 (£235.49 inc-VAT) per pack

Rarely requested product sourced directly, possibly manufactured to order.. Kingspan TR26 120mm, 2 x 1.2x2.4m = 5.76m² - ranging from £27.68 to £28.96 per m²

1 plus packs @ £28.96 per m² / £83.42 per board = £166.83 (£200.20 inc-VAT) per pack
4 plus packs @ £28.71 per m² / £82.68 per board = £165.35 (£198.42 inc-VAT) per pack
7 plus packs @ £28.45 per m² / £81.94 per board = £163.87 (£196.64 inc-VAT) per pack
10 plus packs @ £28.19 per m² / £81.20 per board = £162.40 (£194.88 inc-VAT) per pack
13 plus packs @ £27.94 per m² / £80.46 per board = £160.92 (£193.10 inc-VAT) per pack
16 plus packs @ £27.68 per m² / £79.72 per board = £159.44 (£191.33 inc-VAT) per pack

Common product, generally held by all depots Generic Aluminised Tape, 100mm x 45m = 45lm - ranging from £0.16 to £0.17 per lm

1 plus rolls @ £0.17 per lm = £7.62 (£9.14 inc-VAT) per roll
5 plus rolls @ £0.17 per lm = £7.55 (£9.06 inc-VAT) per roll
10 plus rolls @ £0.17 per lm = £7.48 (£8.98 inc-VAT) per roll
15 plus rolls @ £0.16 per lm = £7.41 (£8.89 inc-VAT) per roll
20 plus rolls @ £0.16 per lm = £7.35 (£8.82 inc-VAT) per roll
25 plus rolls @ £0.16 per lm = £7.28 (£8.74 inc-VAT) per roll

Price and Availability Information

Presently there are no availability restrictions, apart from manufacturing lead-times and minimum quantity order levels on certain product sizes.
Please observe the 'Star Rating' indicators to assess availability.

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations


Product Characteristics

The Facings

Kingspan Thermaroof TR26 is faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture.

The Core

The core of TR26 is manufactured withNilrYam technology, a high performance rigid thermoset polyisocyanurate (PIR) insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

Compressive Strength

The compressive strength of TR26 typically exceeds 150 kPa at 10% compression, when tested to BS / I.S. EN 826: 1996 (Thermal insulating products for building applications. Determination of compression behaviour).

Water Vapour Resistance

Adjusted for the effect of board joints, the product achieves a resistance greater than 100 MN-s/g, when tested in accordance with BS EN 12086: 1997 / I.S. EN 12086: 1998 (Thermal insulating products for building applications Determination of water vapour transmission properties). TR26 should always be installed over a vapour control layer or sealed metal deck.

Durability

If correctly applied, the TR26 Boards have an indefinite life. Its durability depends on the supporting structure and the conditions of its use.

Resistance to Solvents, Fungi & Rodents

The insulation core is resistant to short–term contact with petrol and with most dilute acids, alkalis and mineral oils.
However, it is recommended that any spills be cleaned off fully before the boards are installed. Ensure that safe methods of cleaning are used, as recommended by the suppliers of the spilt liquid. The insulation core is not resistant to some solvent–based adhesives systems, particularly those containing methyl ethyl ketone. Adhesives containing such solvents should not be used in association with this product.

Damaged boards or boards that have been in contact with harsh solvents or acids should not be used.

The insulation core and facings used in the manufacture of TR26 resist attack by mould and microbial growth, and do not provide any food value to vermin

Fire Performance

TR26, when subjected to the British Standard fire test specified in the table below, will achieve the result shown, when waterproofed with a single-ply waterproofing membrane.

Test BS 476-3: 2004 (External fire exposure roof test)

Result Dependent on single-ply membrane adopted Further details on the fire performance of Kingspan Insulation products may be obtained from the Kingspan Insulation Technical Service Department (see below).


Product benefits

    High performance rigid thermoset insulation - thermal conductivity 0.022 W/m-K
    LPCB approved to LPS 1181: Part 1
    FM approved for Class 1 steel deck roof assemblies
    Fully compatible with most mechanically fixed single-ply waterproofing systems
    Compatible with most green roof systems
    Installation technique is ideal for fast track building programmes
    Resistant to the passage of water vapour
    Easy to handle and install
    Ideal for new build and refurbishment
    Non-deleterious material
    Manufactured with a blowing agent that has zero ODP and low GWP


Product Specifications

Kingspan TR26 Flat Roof, Torch Applied, Rigid PIR Insulation Boards

Product Code

Board dimensions

Thickness (mm)

λ Value (w/mK)

R-value (m²K/W)

U Value (W/m²K)

Weight (kg/m²)

Unit weight (kg)

Kingspan TR26 70mm 4 x 1.2m x 2.4m = 11.52m² 70 0.022 3.15 0.32 2.71 31.24
Kingspan TR26 80mm 4 x 1.2m x 2.4m = 11.52m² 80 0.022 3.60 0.28 3.03 34.92
Kingspan TR26 85mm 3 x 1.2m x 2.4m = 8.64m² 85 0.022 3.85 0.26 3.19 27.57
Kingspan TR26 90mm 3 x 1.2m x 2.4m = 8.64m² 90 0.022 4.05 0.25 3.35 28.95
Kingspan TR26 95mm 3 x 1.2m x 2.4m = 8.64m² 95 0.022 4.30 0.24 3.51 30.33
Kingspan TR26 100mm 3 x 1.2m x 2.4m = 8.64m² 100 0.022 4.50 0.23 3.67 31.71
Kingspan TR26 105mm 3 x 1.2m x 2.4m = 8.64m² 105 0.022 4.75 0.22 3.83 33.12
Kingspan TR26 110mm 3 x 1.2m x 2.4m = 8.64m² 110 0.022 5.00 0.20 3.99 34.50
Kingspan TR26 115mm 2 x 1.2m x 2.4m = 5.76m² 115 0.022 5.20 0.20 4.15 23.92
Kingspan TR26 120mm 2 x 1.2m x 2.4m = 5.76m² 120 0.022 5.45 0.19 4.31 24.84
Kingspan TR26 125mm 2 x 1.2m x 2.4m = 5.76m² 125 0.022 5.65 0.18 4.47 25.76
Kingspan TR26 130mm 2 x 1.2m x 2.4m = 5.76m² 130 0.022 5.90 0.17 4.63 26.68
Kingspan TR26 135mm 2 x 1.2m x 2.4m = 5.76m² 135 0.022 6.10 0.17 4.79 27.60
Kingspan TR26 140mm 2 x 1.2m x 2.4m = 5.76m² 140 0.022 6.35 0.16 4.95 28.52
Kingspan TR26 150mm 2 x 1.2m x 2.4m = 5.76m² 150 0.022 6.80 0.15 5.27 30.36
Thermal conductivity / Lambda value (W/mK) = 0.022 to 0.022 | Compressive Strength (kPa) = > 150 | Water vapour resistance (MNs/g) = > 100 | Fire Performace = N/A | Please Note: R-Value = Thermal Resistance; U-Value = Thermal Transmittance Co-efficient; Compressive Strength = kiloPascals; Vapour resistance = Meganewton second gram

Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.

Kingspan TR26 Datasheet | Kingspan Product Selector | Kingspan Design Manual | Kingspan BBA U-Value Compliancy Cert. | TR26 CE Performance Declaration

Kingspan Kooltherm® TR26 Range - Certification

Kingspan Thermaroof® TR24 comprises a high performance rigid thermoset insulation core faced with a bitumen coated glass tissue finished with a thermofusible polypropylene fleece on its upper surface and a mineralised glass tissue on its lower surface.  The product is manufactured: with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP); in accordance with the requirements of BS 4841–3; under a management system certified to BS EN ISO 9001: 2008, BS EN ISO 14001: 2004 and BS OHSAS 18001: 2007, by Kingspan Insulation Limited and should be installed in accordance with the instructions issued by them.

CE Marking - Kingspan has provided Decelerations of Performance for its products. CE marking is the visible sign, that the product has met the requirements of the European Norms (ENs) and is therefore compliant with the Construction Products Regulation (CPR).


  • Kingspan TR24

    Fibre free, rigid insulation used for flat roofs that is compatible with the majority of torch applied waterproofing system

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    Kingspan Therrmaroof TR24 insulation for flat roofs waterproofed with partially bonded torch applied multi–layer bituminous waterproofing
  • Kingspan TR27

    Glass tissue faced insulation for fully adhered single-ply, partially bonded built-up felt, mastic asphalt waterproofing.

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    Kingspan TR27 glass tissue faced insulation for fully adhered single-ply partially bonded asphalt waterproofing
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  • Celotex TD4000

    Celotex Tempchek Deck TD4000 Range is PIR insulation bonded to plywood for, use in smaller flat roof applications.

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    Celotex Tempchek Deck is PIR insulation bonded to plywood for flat roof applications

Product Installation - Kingspan TR26

Tapered Roofing

Kingspan Thermaroof TR26 is also available in a tapered version, Kingspan Thermataper TT46, (Priced on Application) comprising a high performance rigid thermoset insulation core, manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP), faced on both sides with a low emissivity composite foil facing. Kingspan Thermataper TT46 comes with a supporting design service. This ensures that the most cost-effective solution for a roof is identified and that the end result is a tapered system design which meets a roof's rainwater run-off and insulation requirements.

Further details of Kingspan Thermataper TT46 are available from the Kingspan Insulation Tapered Roofing Department (see rear cover), which should be consulted as early as possible in the process of designing a roof.

Roof Waterproofing

TR26 is suitable for use with most mechanically fixed single-ply waterproofing membranes. Please Note: Kingspan Thermaroof TR26 Is not suitable for use with bitumen based built-up waterproofing systems or mastic asphalt.

Water Vapour Control

TR26 should be installed over a separate vapour control layer, in new build roofs, unless it is being used in conjunction with a sealed metal deck.

Regardless of the deck type it is recommended that a condensation risk analysis is carried out for every project. For refurbishment projects, involving the addition of insulation to existing insulated flat roofs, or roofs constructed of insulated steel faced composite panels, it is imperative that a U Value calculation and condensation risk analysis is carried out for every project, in order to ensure that the correct thickness of insulation is installed to achieve the required thermal performance, whilst avoiding interstitial condensation.

In refurbishment projects, where TR26 is to be installed over an existing bituminous waterproofing membrane, the membrane can be used as a vapour control layer, as long as it is in a good water tight condition. Where this is not the case, a separate vapour control layer should be installed. A minimum separate vapour control layer should consist of a 1000 gauge (250 micron) polythene sheet, with all joints lapped and then sealed with double sided self adhesive tape.

Roof Loading / Traffic

TR26 is suitable for use on access roof decks subject to limited foot traffic. Where inappropriate foot traffic is liable to occur it is recommended that the roof surface is protected by specially constructed walk-ways. For further advice on the acceptability of specific foot traffic regimes, please contact the Kingspan Insulation Technical Service Department (see rear cover).

Green Roofs

TR26 is suitable for use under most green roof systems. Green roof systems are a specialist design area. When designing a loose-laid insulated green roof assembly consideration needs to be given to the following.

Green roof systems are required to have a minimum dry weight of 80 kg/m2 to ballast the insulation boards beneath them.

However, the total required dry weight will depend upon wind uplift, which in turn will vary with the geographical location of the building, local topography, and the height and width of the roof concerned. The necessity for any additional dry weight should be assessed in accordance with BS 6399-2:1997 (Loading for Buildings. Code of practice for wind loads) or BS / I.S. EN 1991 -1 -4: 2005 (National Annex to Eurocode 1 Actions on structures. General Actions. Wind Actions).

When installing a loose-laid insulated green roof assembly, any insulation must be immediately over-laid with the green roof system, which must meet all of the requirements outlined above. Where these requirements cannot be ensured, the insulation must be mechanically fixed.

For further information please contact the Kingspan Insulation Technical Service Department (see below). Lightning Protection Building designers should give consideration to the requirements of BS / I.S. EN 62305: 2006 (Protection against lightning)

Installing over Metal Decks

Where an FM or LPCB approved construction is required, please refer to 'LPCB & FM Certification' on page 13.

Metal decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.

If using a sealed metal deck there is no requirement for a separate vapour control layer.

If the metal deck is not sealed the vapour control layer should be loose-laid.

Where one run of the specified vapour control layer laps another, there should be minimum 150 mm side and end overlaps, which should be adequately sealed.

Turn up the vapour control layer at the edge of the roof to a height appropriate to the specified waterproofing
membrane.

Boards of TR26 should be secured to the deck using mechanical fixings e.g. telescopic tube fasteners

Insulation boards should always be laid break-bonded, either with their long edges at right angles to the trough openings, or diagonally across the corrugation line, and with joints lightly butted. There should be no gaps at abutments.

Roof-light or ventilator kerbs etc. should always insulated with the same thickness of TR26 as the general roof area.

A 25 mm thick TR26 upstand should be used around the perimeter of the roof on the internal fagade of parapets.

A minimum distance of 300 mm should be maintained between the top of the insulation upstand and the bottom
of the horizontal roof insulation.

The waterproofing membrane is also mechanically fixed in accordance with the membrane manufacturer's instructions, over the whole insulated area including any insulation upstands, as soon as possible after laying the
insulation boards.

Installing over Concrete Decks

Concrete decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow
correct falls to all rainwater outlets.

The vapour control layer should be loose-laid over the deck.

Where one run of the specified vapour control layer laps another, there should be minimum 150 mm side and end
overlaps, which should be adequately sealed.

Turn up the vapour control layer at the edge of the roof to a height appropriate to the specified waterproofing
membrane.

Boards of TR26 should be secured to the deck using mechanical fixings e.g. telescopic tube fasteners (see 'Mechanical Fixings').

Insulation boards should always be laid break-bonded, either with their long edges at right angles to the edge of, or diagonally across the roof, and with joints lightly butted. There should be no gaps at abutments.

Roof-light or ventilator kerbs etc. should always insulated with the same thickness of TR26 as the general roof area.

A 25 mm thick TR26 upstand should be used around the perimeter of the roof on the internal fagade of parapets.

A minimum distance of 300 mm should be maintained between the top of the insulation upstand and the bottom of the horizontal roof insulation.

The waterproofing membrane is also mechanically fixed in accordance with the membrane manufacturer's instructions, over the whole insulated area including any insulation upstands, as soon as possible after laying the insulation boards.


Manufacturer's Contact Details

Kingspan Limited

Kingspan Kooltherm Phenolic Foam, Therma PIR, and Styrozone Polystyrene range of rigid insulation boards

Pembridge, Leominster, Herefordshire, HR6 9LA

Kingspan Technical Advisory Service.

Telephone: 01544 388 601 - Fax: 01544 388 888
Email: info@kingspaninsulation.co.uk  / technical@kingspaninsulation.co.uk
Web sites: Kingspan Home Page / Kingspan U-Value Calculator.

Our Contact Details

Insulation Online Limited

27 Massetts Road, Horley, Surrey, Rh4 7DQ, UK

Telephone: 0333 9000 989

Telephone: 01293 781252

Facsimile: 0333 7000 797

Email: enquiries@just-insulation.com