Kingspan Insulation Thermaroof TR27 flat roof board Kingspan Insulation

Kingspan Thermaroof TR27

High performance rigid Polyisocyanurate (PIR) flat roof insulation board

Can be used on flat roofs with fully adhered single-ply, partially bonded built-up felt, mastic asphalt, and cold liquid waterproofing.

Fully compatible with single–ply non–bituminous membranes that are fully bonded with solvent based adhesive systems.

Fully compatible with most bitumen based and mastic asphalt waterproofing systems.

Compatible with most green roof systems.

Ideal for new build and refurbishment.

Resistant to the passage of water vapour.

Thicknesses and Availability:

Available in most popular thicknesses from the manufacturer; short lead-times may apply as we may need to get stock in before delivering to site.

This Thermaroof Range includes the following readily available product thicknesses: 25mm, 50mm, 80mm, 100mm, 120mm, 130mm, 140mm and 150mm.

The folllowing thicknesses are manufactured to order: 70mm, 75mm, 90mm, 110mm and 160mm; these may carry minimum order levels.

Due to supply challenges from the manufacturers, please allow extended lead times on all PIR boards. Please feel free to contact me to check availability and lead times.

Product Information

General information about Kingspan Thermaroof TR27

Product Application

Flat roof insulating board

Kingspans high performance polyisocyanurate (PIR) foam board, Thermaroof TR27, is suitable for use in flat roofs waterproofed with fully adhered single-ply membranes, partially bonded built-up felt, mastic asphalt and cold liquid applied waterproofing applications.

Product Make-up

Core

Kingspan Thermaroof TR27 is manufactured with Nilflam technology, a high performance fibre–free rigid thermoset polyisocyanurate (PIR) insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)

Facings

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

Product Properties

Thermal Conductivity 0.027 W/m·K (insulant thickness > 80 mm)
0.025 W/m·K (insulant thickness 80 – 119 mm)
0.024 W/m·K (insulant thickness ≥ 120 mm) W/m·K
Compressive Strength 150 kPa at 10% compression BS EN 826: 2013
Nominal Density 32 kg/m³
Board Length 0.6m and 1.2m
Board Width 1.2m and 2.4m
Board Edge Square
Water Vapour Resistivity > 300 MNs/gm BS / I.S. EN 12086: 2013

Product Prices

Buy Kingspan Thermaroof TR27

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple boards... 12 x 0.6x1.2m = 8.64m² - in this instance, there are 12 x boards in a pack where each board is 0.6m x 1.2m providing a total coverage of 8.64m² per pack.

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR27 25mm, 12 x 0.6x1.2m = 8.64m² - ranging from £6.16 to £6.44 per m²

1 x pack @ £6.44 per m² / £4.64 per board = £55.66 (£66.79 inc-VAT) per pack
2 x packs @ £6.38 per m² / £4.60 per board = £55.16 (£66.19 inc-VAT) per pack
3 x packs @ £6.33 per m² / £4.56 per board = £54.67 (£65.60 inc-VAT) per pack
4 x packs @ £6.27 per m² / £4.52 per board = £54.18 (£65.02 inc-VAT) per pack
5 x packs @ £6.21 per m² / £4.47 per board = £53.69 (£64.43 inc-VAT) per pack
6 x packs @ £6.16 per m² / £4.43 per board = £53.19 (£63.83 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR27 50mm, 6 x 1.2x1.2m = 8.64m² - ranging from £10.02 to £10.49 per m²

1 x pack @ £10.49 per m² / £15.10 per board = £90.61 (£108.73 inc-VAT) per pack
2 x packs @ £10.39 per m² / £14.97 per board = £89.81 (£107.77 inc-VAT) per pack
3 x packs @ £10.30 per m² / £14.83 per board = £89.00 (£106.80 inc-VAT) per pack
4 x packs @ £10.21 per m² / £14.70 per board = £88.20 (£105.84 inc-VAT) per pack
5 x packs @ £10.12 per m² / £14.57 per board = £87.40 (£104.88 inc-VAT) per pack
6 x packs @ £10.02 per m² / £14.43 per board = £86.60 (£103.92 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR27 80mm, 4 x 1.2x1.2m = 5.76m² - ranging from £14.89 to £15.57 per m²

1 x pack @ £15.57 per m² / £22.43 per board = £89.70 (£107.64 inc-VAT) per pack
2 x packs @ £15.44 per m² / £22.23 per board = £88.91 (£106.69 inc-VAT) per pack
3 x packs @ £15.30 per m² / £22.03 per board = £88.12 (£105.74 inc-VAT) per pack
4 x packs @ £15.16 per m² / £21.83 per board = £87.32 (£104.78 inc-VAT) per pack
5 x packs @ £15.02 per m² / £21.63 per board = £86.53 (£103.84 inc-VAT) per pack
6 x packs @ £14.89 per m² / £21.44 per board = £85.74 (£102.89 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR27 100mm, 4 x 1.2x1.2m = 5.76m² - ranging from £18.24 to £19.09 per m²

1 x pack @ £19.09 per m² / £27.49 per board = £109.94 (£131.93 inc-VAT) per pack
2 x packs @ £18.92 per m² / £27.24 per board = £108.97 (£130.76 inc-VAT) per pack
3 x packs @ £18.75 per m² / £27.00 per board = £108.00 (£129.60 inc-VAT) per pack
4 x packs @ £18.58 per m² / £26.76 per board = £107.02 (£128.42 inc-VAT) per pack
5 x packs @ £18.41 per m² / £26.51 per board = £106.05 (£127.26 inc-VAT) per pack
6 x packs @ £18.24 per m² / £26.27 per board = £105.08 (£126.10 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR27 120mm, 4 x 1.2x1.2m = 5.76m² - ranging from £22.11 to £23.13 per m²

1 x pack @ £23.13 per m² / £33.31 per board = £133.24 (£159.89 inc-VAT) per pack
2 x packs @ £22.93 per m² / £33.02 per board = £132.06 (£158.47 inc-VAT) per pack
3 x packs @ £22.72 per m² / £32.72 per board = £130.89 (£157.07 inc-VAT) per pack
4 x packs @ £22.52 per m² / £32.43 per board = £129.71 (£155.65 inc-VAT) per pack
5 x packs @ £22.31 per m² / £32.13 per board = £128.53 (£154.24 inc-VAT) per pack
6 x packs @ £22.11 per m² / £31.84 per board = £127.35 (£152.82 inc-VAT) per pack

Limited stock of the most popular boards sizes may be held at some of our larger depots.

Where products need to be brought in from Kingspan, please allow approx. 1 week for delivery on stocked items (highlighted in green below in the properties section) and up to 3 weeks on made to order thicknesses. While Kingspan keep the majority of the popular thicknesses in stock, less popular thicknesses may carry a minimum order level.

Kingspan reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

Please observe the 'Star Rating' indicators to assess availability.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations


Product Performance and Guides

Product Performance, Manufacturer Certification, Downloads, and Installation Guides

Thermal Resistance

While we have provided Thermal Resistance values for all thicknesses on the Kingspan TR27 datasheet, some thicknesses may not be readily available.

Items highlighted in green are generally held in stock by Kingspan.

Product Thickness Thermal Resistance kg/m²
Kingspan TR27 25mm 25mm 0.95 m²K/W 1.78 kg/m²
Kingspan TR27 50mm 50mm 1.90 m²K/W 2.55 kg/m²
Kingspan TR27 60mm 60mm 2.30 m²K/W 2.93 kg/m²
Kingspan TR27 70mm 70mm 2.65 m²K/W 3.23 kg/m²
Kingspan TR27 75mm 75mm 2.85 m²K/W 3.39 kg/m²
Kingspan TR27 80mm 80mm 3.20 m²K/W 3.55 kg/m²
Kingspan TR27 90mm 90mm 3.60 m²K/W 3.97 kg/m²
Kingspan TR27 100mm 100mm 4.00 m²K/W 4.30 kg/m²
Kingspan TR27 110mm 110mm 4.40 m²K/W 4.64 kg/m²
Kingspan TR27 120mm 120mm 5.00 m²K/W 4.97 kg/m²
Kingspan TR27 125mm 125mm 5.20 m²K/W 5.14 kg/m²
Kingspan TR27 130mm 130mm 5.40 m²K/W 5.31 kg/m²
Kingspan TR27 140mm 140mm 5.80 m²K/W 5.64 kg/m²
Kingspan TR27 150mm 150mm 6.25 m²K/W 5.90 kg/m²
Kingspan TR27 160mm 160mm 7.25 m²K/W 6.31 kg/m²

Standards & Approval

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

Kingspan Thermaroof TR27 is also manufactured to the highest standards under a management system certified to ISO 9001: 2015 (Quality management systems. Requirements), ISO 14001: 2015 (Environmental Management Systems Requirements), BS / I.S OHSAS 18001: 2007 (Occupational Health and Safety Management Systems Requirements) and ISO 50001: 2018 (Energy Management Systems Requirements with Guidance for Use).

Kingspan Thermaroof TR27, produced at Kingspan Insulation’s Pembridge and Selby manufacturing facilities, is covered by BBA Certificate 16/5332.

Flat Roof Installation

Over Metal Deck specific
  • 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, and the insulation boards are to be bonded down, in order to ensure an adequate bond between the metal deck and the vapour control layer, the metal deck should be suitably primed, in accordance with the primer manufacturer’s instructions, prior to the application of the hot bitumen, or suitable alternative proprietary adhesive system, used to bond the vapour control layer to the deck.
  • If the metal deck is not sealed, and the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • Over Concrete Deck specific
  • Concrete decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • If the insulation boards are to be bonded down, in order to ensure an adequate bond between the vapour control layer and the concrete deck, the concrete or screeded surface should be suitably primed, in accordance with the primer manufacturer’s instructions, prior to the application of the hot bitumen, or suitable alternative proprietary adhesive system, used to bond the vapour control layer to the deck.
  • If the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • Over Ply Deck specific
  • Plywood decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • If the insulation boards are to be bonded down, in order to ensure an adequate bond between the plywood deck and the vapour control layer, the plywood surface should be suitably primed, in accordance with the primer manufacturer’s instructions, prior to the application of the hot bitumen, or suitable alternative proprietary adhesive system, used to bond the vapour control layer to the deck.
  • Alternatively, the vapour control layer can be nailed to the deck, in which case the nail heads will become sealed with the subsequent bonding of the insulation boards to the vapour control layer.
  • If the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • Over Existing Flat Roof specific
  • The existing waterproofing membrane surface should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • Where the existing waterproofing membrane is not fit for purpose as a vapour control layer, and the new insulation boards are to be bonded down, a separate vapour control layer should be bonded to it with hot bitumen, or suitable alternative proprietary adhesive system. If the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • General guides for Flat Roof Installation
  • 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 new waterproofing membrane.
  • Boards of Kingspan Thermaroof TR27 should be bonded down by laying into hot bitumen (max. temperature 240°C) mopped or poured over the vapour control layer, or with the use of a suitable alternative proprietary adhesive system.
  • Alternatively, the insulation boards should be secured to the deck using mechanical fixings e.g. telescopic tube fasteners (see ‘Mechanical Fixings’ below).
  • 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 be insulated with the same thickness of Kingspan Thermaroof TR27 as the general roof area.
  • A 25 mm thick Kingspan Thermaroof upstand should be used around the perimeter of the roof on the internal façade 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.
  • For roofs without parapets, a timber edging batten of the same height of the insulation is to be used to fix the fascia board to the gutter system. Please contact the membrane manufacturer for more details.
  • The waterproofing membrane is installed 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.
  • Mechanical Fixings
  • The number of mechanical fixings required to fix Kingspan Thermaroof will vary with the geographical location of the building, the local topography, and the height and width of the roof concerned along with the deck type.
  • A minimum of 4 fixings are required to secure 1.2 x 0.6 m boards of Kingspan Thermaroof TR27 to the deck.
  • A minimum of 5 fixings are required to secure 1.2 x 1.2 m boards of Kingspan Thermaroof TR27 to the deck.
  • A minimum of 6 fixings are required to secure 2.4 x 1.2 m boards of Kingspan Thermaroof TR27 to the deck.
  • The requirement for additional fixings should be assessed in accordance with BS 6399–2: 1997 (Loadings for buildings. Code of practice for wind loads) or BS / I.S. EN 1991−1.4: 2005 + A1: 2010 (National Annex to Eurocode 1. Actions on structures. General Actions. Wind Actions).
  • Mechanical fixings must be arranged in an even pattern.
  • Fasteners at insulation board edges must be located > 50 and < 150 mm from edges and corners of the board and not overlap board joints.
  • Each fixing should incorporate a square or circular plate washer (min. 50 x 50 mm or 50 mm diameter).
  • If two layers of insulation are to be installed, the base layer should be mechanically fixed with minimum 1 no. fixing in the centre of the insulation board before fixing the top layer as described above.
  • Kingspan TR27 on Metal Deck
    Kingspan TR27 on a metal deck with no ceiling
    Kingspan TR27 on Concrete Deck
    Kingspan TR27 on a concrete deck
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here