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IMPORTANT: CLICK FOR PIR PRODUCT AVAILABILITY INFORMATION

Kingspan TF70 Thermawall Rigid PIR Insulation Boards

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.

Kingspan TF70, TW55 and TP10 are readily available in the following product thickness's 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 75mm, 80mm, 90mm, 100mm, 105mm, 120mm and 150mm.
Manufactured to order are the following thickness's 45mm, 55mm, 65mm, 85mm, 110mm, 115mm, 130mm, 135mm and 140mm

Product Functions

Kingspan TF70 Thermawall performance rigid PIR boards used for under floor and under-floor heating insulation

Kingspan TF70 or Thermawall TF70 Range comprises performance rigid PIR boards used for under floor and under-floor heating insulation. These boards are faced on both sides with a low emissivity composite foil facing that is highly resistant to the transmission of water vapour.

Please note:
To emphasise the application specific suitability of ThermaWall TW55, Thermapitch TP10, and ThermaFloor TF70, Kingspan have branded the same product with these three different names.

Common applications for this product include ...
Beam And Block Floors, Between Floor Joists, Suspended Timber Floors, Between and Under Floor Joists, Beam and Block Floors, Concrete Slab Floors, Upgrading Concrete Slab Floors, Basements, Garage Conversions

 

Product Description

The Front Facings

TF70 is faced on both sides with a low emissivity composite foil facing which is highly resistant to the transmission of water vapour. This reflective, low emissivity surface can effectively double the thermal resistance of the cavity in which the board is placed.

The Core

The core of TF70 is manufactured from trademarked Nilflam technology (a high performance CFC/HCFC free polyisocyanurate (PIR) based formulation). TF70 has a typical density of 32 kg/m3.

TF70 is manufactured without the use of CFCs/HCFCs and has zero Ozone Depletion Potential (ODP).

Compressive Strength

Typically exceeds 140 kPa at 10% compression when tested to BS EN 826: 1996 (Thermal insulating products for building applications. Determination of compression behaviour).

Water Vapour Resistance

Modified to include board facings, the boards achieve a resistance far greater than 100 MN.s/g, when tested in accordance with BS 4370–2: 1993 (Methods of test for rigid cellular materials. Methods 7 to 9)
Where additional vapour control is required an appropriate surface treatment should be applied over the completed insulated wall area (see ‘Water Vapour Control’)

Durability

If correctly applied, the TF70 Board has 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.

Fire Performance

TF70, when subjected to British Standard fire tests, achieves the results given below.
Test - BS 476–3: 1958 (External fire membrane adopted exposure roof test)
Result - SAA rating
Test - BS 476–7: 1997 (Fire tests on building materials and structures. Method of test to determine the classification of the surface spread of flame of products
Result - Class 1 rating

Product Benefits

    High performance rigid thermoset insulation – thermal conductivity 0.022 W/m.K
    Can reduce the cost of related items – soil removal, service connections
    Unaffected by air infiltration
    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 availability indicators

TF70 - Price and Availability Advisory:

Presently there are no availability restrictions, apart from manufacturing lead-times and minimum quantity order levels on the 45mm, 55mm, 65mm, 85mm, 110mm, 115mm, 130mm, 135mm and 140mm

Excellent = Product Availability Excellent Good = Product Availability Good Fair = Product Availability Fair Poor =  Product Availability Poor Undetermined = Product Availability Undetermined
Availability relies on stock levels at closest depots and upon transport logistics to effect deliveries


Technical Data

Kingspan TF70 under floor, under-floor heating, 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 TF70 20mm 15 x 1.2m x 2.4m = 43.2m² 20 0.022 0.90 1.12 0.98 42.45
Kingspan TF70 25mm 12 x 1.2m x 2.4m = 34.56m² 25 0.022 1.10 0.91 1.14 39.48
Kingspan TF70 30mm 10 x 1.2m x 2.4m = 28.8m² 30 0.022 1.35 0.75 1.30 37.50
Kingspan TF70 40mm 8 x 1.2m x 2.4m = 23.04m² 40 0.022 1.80 0.56 1.62 37.36
Kingspan TF70 45mm 7 x 1.2m x 2.4m = 20.16m² 45 0.022 2.00 0.50 1.78 35.91
Kingspan TF70 50mm 6 x 1.2m x 2.4m = 17.28m² 50 0.022 2.25 0.45 1.91 33.06
Kingspan TF70 55mm 5 x 1.2m x 2.4m = 14.4m² 55 0.022 2.50 0.40 2.10 30.25
Kingspan TF70 60mm 5 x 1.2m x 2.4m = 14.4m² 60 0.022 2.70 0.38 2.26 32.55
Kingspan TF70 65mm 4 x 1.2m x 2.4m = 11.52m² 65 0.022 2.95 0.34 2.42 27.88
Kingspan TF70 70mm 4 x 1.2m x 2.4m = 11.52m² 70 0.022 3.15 0.32 2.58 29.76
Kingspan TF70 75mm 4 x 1.2m x 2.4m = 11.52m² 75 0.022 3.40 0.30 2.74 31.60
Kingspan TF70 80mm 4 x 1.2m x 2.4m = 11.52m² 80 0.022 3.60 0.28 2.90 33.44
Kingspan TF70 85mm 3 x 1.2m x 2.4m = 8.64m² 85 0.022 3.85 0.26 3.06 26.46
Kingspan TF70 90mm 3 x 1.2m x 2.4m = 8.64m² 90 0.022 4.05 0.25 3.22 27.84
Kingspan TF70 100mm 3 x 1.2m x 2.4m = 8.64m² 100 0.022 4.50 0.23 3.54 30.60
Kingspan TF70 110mm 3 x 1.2m x 2.4m = 8.64m² 110 0.022 5.00 0.20 3.86 33.36
Kingspan TF70 120mm 2 x 1.2m x 2.4m = 5.76m² 120 0.022 5.45 0.19 4.18 24.08
Kingspan TF70 125mm 2 x 1.2m x 2.4m = 5.76m² 125 0.022 5.65 0.18 4.34 25.00
Kingspan TF70 130mm 2 x 1.2m x 2.4m = 5.76m² 130 0.022 5.90 0.17 4.40 25.36
Kingspan TF70 140mm 2 x 1.2m x 2.4m = 5.76m² 140 0.022 6.35 0.16 4.82 27.78
Kingspan TF70 150mm 2 x 1.2m x 2.4m = 5.76m² 150 0.022 6.80 0.15 5.14 29.62
Thermal conductivity / Lambda value (W/mK) = 0.022 to 0.022 | Compressive Strength (kPa) = > 140 | Water vapour resistance (MNs/g) = > 100 | Fire Performance = Class 1 | 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 TF70 Datasheet | Kingspan Product Selector | Kingspan Design Manual | Kingspan BBA U-Value Compliancy Cert. | TF70 CE Performance Declaration


Kingspan Kooltherm® TF70 Range - Certification

Kingspan Thermafloor® TF70 comprises a high performance rigid thermoset insulation core faced on both sides with a low emissivity composite foil facing. 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 4841–6; under a management system certified to BS / I.S. EN ISO 9001: 2008, BS / I.S. ENISO 14001: 2004 and BS / I.S. 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).


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Product Installation - Kingspan Thermafloor TF70

Installation Below a Floor Slab

The site should be prepared and foundations, where appropriate, built to damp proof course (DPC) level.

A thin sand blinding may be used to achieve a continuous level surface free from projections over rolled hardcore.

The damp proof membrane (minimum 300 micron / 1200 gauge polythene) should be laid with joints well lapped and folded, to prevent the passage of ground water, over well compacted hardcore, prior to laying the insulation boards.

The membrane should be brought up the surrounding foundation walls until it is sufficiently above the height of the wall DPC so that it will connect with or form the DPC.

The insulation boards should always be loose–laid break–bonded, with joints lightly butted.

If two layers of insulation are required, they should be horizontally offset relative to each other so that, as far as possible, the board joints in the two adjacent layers do coincide with each other.

A strip of the insulation board (minimum 20mm thick) should be placed vertically around the perimeter of the floor slab in order to prevent cold bridging. The top of the strip of insulation board should be level with the top of the floor screed and the bottom should be level with the bottom of the horizontal floor insulation, and closely butted up to it.

Insulation boards should be overlaid with a polythene sheet (not less than 125 micron / 500 gauge), to prevent the wet concrete penetrating the joints between the boards, and to act as a vapour control layer. Ensure the polythene sheet has 150 mm overlaps, taped at the joints, and is turned up 100 mm at the walls.

The subsequent installation of the concrete slab and screed or other flooring material is carried out in a manner similar to that for an un–insulated floor. The concrete slab and screed should be allowed to dry out prior to the the installation of the floor finish.

Installation Below a Floor Screed

Concrete slabs should be allowed to dry out fully prior to the installation of the insulation boards (average 1 day per mm of slab thickness).

The surface of the slab should be smooth, flat and free from projections. Beam and block floors should be level and grouted. Rough cast slabs should be levelled using a thin sand blinding to ensure boards are continuously supported.

The damp proof membrane (minimum 300 micron / 1200 gauge polythene) should be laid with joints well lapped and folded, to prevent the passage of ground water, over the concrete floor slab, or beam and block floor, prior to laying the insulation boards.

The membrane should be brought up the surrounding foundation walls until it is sufficiently above the height of
the wall DPC so that it will connect with or form the DPC.

The insulation boards should always be loose–laid break–bonded, with joints lightly butted.

If two layers of insulation are required, they should be horizontally offset relative to each other so that, as far as possible, the board joints in the two adjacent layers do not coincide with each other (see Figure 15).

A strip of the insulation board (minimum 20mm thick) should be placed vertically around the perimeter of the floor slab in order to prevent cold bridging. The top of the strip of insulation board should be level with the top of the floor screed and the bottom should be level with the bottom of the horizontal floor insulation, and closely butted up to it.

Insulation boards should be overlaid with a polythene sheet (not less than 125 micron / 500 gauge), to prevent the wet screed penetrating the joints between the boards, and to act as a vapour control layer. Ensure the polythene sheet has 150 mm overlaps, taped at the joints, and is turned up 100 mm at the walls.

Use sand and cement screed laid to a minimum thickness of 65 mm for domestic construction and 75 mm elsewhere.

Installation in a Suspended Timber Floor

Installation from Above the Floor Joists

The installation of Kingspan Thermafloor TF70 in suspended floor constructions should be carried out before commencement of floor boarding.

The insulation boards should be cut to fit snugly between the floor joists. Measure the distance between the joists prior to cutting the boards as spacings can vary.

In order to ensure insulation boards are flush with the top surface of the joists, they should be supported on minimum 25 mm x 25 mm treated softwood timber battens, proprietary galvanised steel saddle clips, or galvanised nails partially driven into the side of the joists.

Battens / nails should be placed at an appropriate height to suit the thickness of board being fitted, and nails should remain 40 mm proud of the joist.
The insulation boards should then be fitted between the joists so that they are supported by the battens, saddle clips or nails.

If two layers of insulation are required, they should be horizontally offset relative to each other so that , as far as possible, the board joints in the two adjacent layers do not coincide with each other.

All board joints should be tightly butted.

Ensure that insulation boards are fitted tightly between the joists, and any gaps are filled with expanding urethane sealant.

Any narrow gaps between a joist and perimeter wall should be insulated by specially cut pieces of board which in turn should be supported on blocks nailed to the underside of the joists. Gaps less than 25 mm wide should be filled with expanding urethane sealant.

Kingspan Thermafloor TF70 is not suitable for installation directly over timber joists.

Installation from Below the Floor Joists

Floor boards should be fixed over joists prior to fitting Kingspan Thermafloor TF70 from below.

The insulation boards should be cut to fit snugly between the floor joists. Measure the distance between the joists prior to cutting the boards as spacings can vary.

Push the cut insulation boards between the joists so they are flush with the underside of the floor boards.
If two layers of insulation are required, they should be horizontally offset relative to each other so that, as far as possible, the board joints in the two adjacent layers do not coincide with each other.

All board joints should be tightly butted.

Ensure that insulation boards are fitted tightly between the joists, and any gaps are filled with expanding urethane
sealant.

Side–nail 25 mm x 25 mm timber battens to the joists or partially drive galvanised nails into the side of the joists in
the appropriate position to hold the boards in place.

Any narrow gaps between a joist and perimeter wall should be insulated by specially cut pieces of board which in turn should be supported on blocks nailed to the underside of the joists. Gaps less than 25 mm wide should be filled with expanding urethane sealant.

Installation Between Battens under a Timber Floor

Concrete slabs should be allowed to dry out fully prior to the installation of the insulation boards (average 1 day per mm of slab thickness).

The surface of the slab should be smooth, flat and free from projections. Beam and block floors should be level and grouted.

A thin layer of cement / sand mortar, a levelling screed, or a proprietary levelling compound can be used to achieve a level surface, and provide continuous bearing support to the battens, if required. This should be allowed to set, harden and dry (approximately 1 day per mm) before proceeding further.

If there is no damp proof membrane in the concrete floor, one (minimum 300 micron / 1200 gauge polythene) should be laid with joints well lapped and folded, to prevent the passage of ground water, over the concrete floor slab, or beam and block floor, prior to installing the battens.

The membrane should be brought up the surrounding foundation walls until it is sufficiently above the height of the wall DPC so that it will connect with or form the DPC.

Ensure battens are of the appropriate thickness, so that the insulation boards finish flush with their top surface (unless an underfloor heating system is to be used).

The battens should be mechanically fixed down in accordance with the fixing manufacturer’s instructions.

The insulation boards should be cut to fit snugly between the 50 mm wide treated softwood timber battens.
Measure the distance between the battens prior to cutting the boards as spacings can vary.

All board joints should be tightly butted.

Ensure that insulation boards are fitted tightly between battens, and any gaps are filled with expanding urethane sealant.

Any narrow gaps between battens and perimeter wall should be insulated by specially cut pieces of board. Gaps less than 25 mm wide should be filled with expanding urethane sealant.

Insulation boards and battens should be overlaid with a vapour control layer of polythene sheet (not less than 125 micron / 500 gauge), prior to installing the floor.

Ensure the polythene sheet has 150 mm overlaps, taped at the joints, and is turned up 100 mm at the walls.

Installation Below a Floating Timber Floor

Concrete slabs should be allowed to dry out fully prior to the installation of Kingspan Thermafloor TF70 (average 1 day per mm of slab thickness).

The surface of the slab should be smooth, flat and free from projections. Beam and block floors should be level and grouted. In accordance with BRE Good Building Guide 28 Part 1 (Domestic floors: construction insulation and damp-proofing), irregularities should not exceed 5 mm when measured with a 3 metre straight edge.

A thin layer of cement / sand mortar, a levelling screed, or a proprietary levelling compound can be used to achieve a level surface, and prevent the boards of Kingspan Thermafloor TF70 from slipping under the timber floor boards, if required. This should be allowed to set, harden and dry (approximately 1 day per mm) before proceeding further.

If there is no damp proof membrane in the concrete floor, one (minimum 300 micron / 1200 gauge polythene) should be laid with joints well lapped and folded, to prevent the passage of ground water, over the concrete floor slab, or beam and block floor, prior to installing the insulation boards.

The membrane should be brought up the surrounding foundation walls until it is sufficiently above the height of the wall DPC so that it will connect with or form the DPC.

To comply with NHBC recommendations, preservative treated softwood timber battens should be positioned at doorways, access panels and to support partitions. The size of the battens selected should ensure that, when installed, the top surface of the insulation boards are flush with the top of the battens.

The insulation boards should always be loose–laid break–bonded, with joints lightly butted.

Insulation boards should be overlaid with a polythene sheet (not less than 250 micron / 1000 gauge), to act as a slip layer, and a vapour control layer. Ensure the polythene sheet has 150 mm overlaps, taped at the joints, and is turned up 100 mm at the walls.

Timber floor boards e.g. tongue–and–groove 18 mm thick plywood, should then be laid over the insulation and battens with staggered cross–joints in accordance with DD ENV 12872 : 2000.

An expansion gap of 2 mm per metre run of floor, or a minimum of 10 mm overall, whichever is the greater, should be provided between the floor boards and the perimeter walls.

Where there are long (over 5 metres), uninterrupted lengths of timber floor boards, proprietary intermediate expansion joints should be installed on the basis of a 2 mm gap per metre run.

Before the timber floor boards are interlocked, apply a continuous bead of waterproof wood grade PVA adhesive to the top and bottom of the tongue and groove joints.

Once the timber floor boards have been laid, temporary wedges should be inserted between the walls and the floor, to maintain tight joints, until the adhesive has set.

Once the wedges are removed, they are replaced with strips of cork or polyethylene foam to act as a compressible filler and to help prevent cold bridging. Skirtings may then be fixed.

Wheeled / Foot Traffic

Ensure boards are protected during installation from wheeled / foot traffic by using scaffold planks or other protective measures.

Underfloor Heating Systems

Please refer to the instructions of the specific underfloor heating system manufacturer


Contact Manufacturer

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.

Contact us

Insulation Online Limited

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

Telephone: 0333 8000 828

Telephone: 01293 781252

Facsimile: 0333 7000 797

Email: enquiries@insulation-online.com