Shopping Basket

Order before 10am for next working day delivery.  Subject to product availability locally, and vehicle delivery slots

Kingspan Kooltherm K12 Phenolic Framing Board

High performance Kingspan product, available in most popular thickness’s from the manufacturer, therefore short lead-times apply. Kingspan Kooltherm K12 framing board forstud and cavity wall insulationThis Kooltherm Range includes the following readily available product thicknesses 50mm, 60mm and 70mm. Manufactured to order are the following thicknesses 25mm, 40mm, 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 140mm and 150mm

Product Applications

K12 Framing Board is faced on both sides with a low emissivity composite foil facing which is highly resistant to the transmission of water vapour.
The reflective, low emissivity surface can effectively double the thermal resistance of the cavity in which the board is placed.
K12 may be installed either between or outside timber studwork.
The insulation boards are easily cut to individual studwork spacings.


Drop-down price list / Add to shopping basket

Click to Buy: Kingspan K12 Phenolic Wall Framing Boards - Foil Faced = Both Sides

K12 Framing Board is faced on both sides with a low emissivity composite foil facing which is highly resistant to the transmission of water vapour. The reflective, low emissivity surface can effectively double the thermal resistance of the cavity in which the board is placed. It may be installed either between or outside timber studwork.

Procedure: Select products below to see pricing structure | Use product tick-boxes to select required products | Add to Basket

Our Prices are currently being revised please contact us for the latest prices

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 Board Facings

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 K12 framing board is a premium performance CFC/HCFC free rigid phenolic insulant of typical density 35 kg/m3.

CFC/HCFC free

K12 are manufactured without the use of CFCs/HCFCs and have zero Ozone Depletion Potential (ODP).

Compressive Strength

Typically exceeds 125 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 Where additional vapour control is required an appropriate surface treatment should be applied over the completed insulated wall area
(refer to 'Water Vapour Control').

Durability

If correctly applied, K12 framing board has an indefinite life. Its durability depends on the supporting structure and the conditions of its use.

Cold Bridging

When installed between timber studwork, the effects of cold bridging must be taken into account. In most cases this can represent up to 15% of the external surface area of the building which will significantly affect the overall U–value.
The problem is avoided when insulating outside or inside the studwork. By insulating the entire building envelope, or lining internally with insulation, the problem of cold bridging can be eliminated completely.

Water Vapour Control

Consideration should be given to the risk of condensation, when designing thermal elements.

Condensation can be controlled, in constructions containing Kingspan Kooltherm® K12 FramingBoard,by ensuring there is a layer of high vapour resistance on the warm side of the insulation layer.

If required, the vapour resistance of the wall lining can be increased by the use of a vapour check plasterboard,the use of Kingspan Kooltherm® K18 Insulated Plasterboard which contains an integral vapour control layer, the use of a layer of polythene sheeting, or by the application of two coats of Gyproc Drywall Sealer ... with appropriate detailing at joints, penetrations and wall perimeters.

A condensation risk analysis should be carried out following the procedures set out in BS 5250: 2002 (Code of practice for the control of condensation in buildings). The Kingspan Insulation Technical Service Department (see rear cover) can provide this service

Surface Condensation

Surface condensation can be controlled by the selection of the correct thickness of insulation, the heating and ventilation system being designed with condensation in mind, and subsequently the combination of heating and ventilation being used correctly.

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 suppliers of the spilt liquid.

The insulation core is not resistant to some solvent–based adhesive 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 K8 Cavity Board resist attack by mould and microbial growth and do not provide any food value to vermin.

Fire Stops

Current Building Regulations / Standards should be considered withregardtotherequirementsfor,andprovisionof,firestops.

Building designers should give consideration to the requirements of BS / I.S. EN 62305: 2006 (Protection against lightning).


Product Advantages

    Premium performance rigid thermoset insulation – thermal conductivities as low as 0.020 W/m.K
    Class 0 fire rated insulation core
    Negligible smoke obscuration
    Can be used between studs or as an insulating sheathing
    Suitable for use with timber frame and steel frame wall construction
    Unaffected by air infiltration
    Resistant to the passage ofwater vapour
    Easy to handle and install
    Ideal for new build or refurbishment
    Non−deleterious material
    Manufactured with a blowing agent that has zero ODP and low GWP


Product Specifications

Kingspan K12 Phenolic Insulation Boards for stud framing and cavity wall applications

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 K12 25mm 12 x 1.2m x 2.4m = 34.56m² 25 0.021 1.15 0.87 1.09 37.68
Kingspan K12 40mm 8 x 1.2m x 2.4m = 23.04m² 40 0.021 1.40 0.72 1.61 37.12
Kingspan K12 50mm 6 x 1.2m x 2.4m = 17.28m² 50 0.020 2.50 0.40 1.96 33.90
Kingspan K12 60mm 5 x 1.2m x 2.4m = 14.4m² 60 0.020 3.00 0.34 2.31 33.30
Kingspan K12 70mm 4 x 1.2m x 2.4m = 11.52m² 70 0.020 3.50 0.29 2.66 30.68
Kingspan K12 75mm 4 x 1.2m x 2.4m = 11.52m² 75 0.020 3.75 0.27 2.84 32.72
Kingspan K12 80mm 4 x 1.2m x 2.4m = 11.52m² 80 0.020 4.00 0.25 3.01 34.68
Kingspan K12 90mm 3 x 1.2m x 2.4m = 8.64m² 90 0.020 4.50 0.23 3.36 29.04
Kingspan K12 100mm 3 x 1.2m x 2.4m = 8.64m² 100 0.020 5.00 0.20 3.71 32.07
Kingspan K12 110mm 3 x 1.2m x 2.4m = 8.64m² 110 0.020 5.50 0.19 4.06 35.10
Kingspan K12 120mm 2 x 1.2m x 2.4m = 5.76m² 120 0.020 6.00 0.17 4.41 25.42
Kingspan K12 140mm 2 x 1.2m x 2.4m = 5.76m² 140 0.020 7.00 0.15 5.11 29.44
Kingspan K12 150mm 2 x 1.2m x 2.4m = 5.76m² 150 0.020 7.50 0.14 5.46 31.46
Thermal conductivity / Lambda value (W/mK) = 0.021 to 0.020 | Compressive Strength (kPa) = > 100 | Water vapour resistance (MNs/g) = > 100 | Fire Performace = 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 K12 Datasheet | Kingspan Product Selector | Kingspan Design Manual | Kingspan BBA U-Value Compliancy Cert. | K12 CE Performance Declaration


Kingspan Kooltherm® K12 Range - Certification

K12 Wall Framing Board insulation is manufactured to the highest standards under a management system certified to BS / I.S. EN ISO 9001: 2008 (Quality management systems. Requirements), BS / I.S. EN ISO 14001 : 2004 (Environmental Management Systems. Requirements) and BS / I.S. OHSAS 18001: 2007 (Health and Safety Management Systems. Requirements).

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 TW53

    Kingspan TW53 designed for wall insulation to be used behind traditional and lightweight polymer modified renders

    Click for more information

    Kingspan TW53 wall insulation behind traditional and lightweight polymer modified renders
  • Kingspan TW50

    Kingspan ThermaWall TW50 is a cut-down (0.45 x 1.2m) version of the TP10, TF70 & TW55, general application boards.

    Click for more information

    Kingspan TW50 is a cut-down (0.45 x 1.2m) version of TP10, TF70 and TW55
  • Celotex CW4000

    Celotex Cavity Wall boards are cut-down (0.45 x 1.2m) versions of the TB4000, GA4000 & XR4000 general application boards.

    Click for more information

    Celotex Cavity Wall boards are cut-down versions of the  general application boards TB4000, GA4000 & XR4000
  • Celotex FR5000

    Celotex FR5000 is ideal for external masonry wall that requires the benefits of increased fire resistance protection

    Click for more information

    Celotex FR5000 partial fill cavity wall offers increased fire resistance protection

Product Installation - Kingspan K12

External Masonry – Timber Frame Wall with Insulating Sheathing

Framing board wooden stud wall application

K12 framing board should be fixed to the external surface of the timber frame structure (outside of any OSB or plywood sheathing) and restrained using temporary fixing in the form of large headed galvanised clout nails prior to being tied into the masonry leaf with an appropriate timber frame wall tie. Ensure that K12s are tightly butted and that any requirements of the timber frame manufacturer are met.
Please contact the Kingspan Insulation Technical Service Department (see contact information below) for further information.

Wall Ties – Timber Frame Wall

The outer leaf of masonry may be constructed in the conventional manner using appropriate wall ties to restrain the two wall skins together. The ties should be inserted whilst constructing the outer leaf ensuring a slight offset is achieved, sloping the tie downwards towards the outer leaf.

External Masonry – Steel Frame Wall with Insulating SheathingFraming board metal stud wall application

Similarly fixed as for 'Timber Frame', K12 should be restrained to the outside of the steel frame construction ensuring vertical board joints coincide with a vertical member. Fixings should be in accordance with the steel frame manufacturer's recommendations.
Please contact the Kingspan Insulation Technical Service Department (see contact information below) for further information.

Wall Ties – Steel Frame Wall

Advice should be sought from the appropriate steel frame manufacturer for recommendations of a suitable wall tie specification.

External Masonry - Timber Frame Wall with Insulation

Between Studs To restrain insulation boards from moving within the timber stud cavity, side nail battens to the stud to provide a 'stop'. This should coincide with board thickness, allowing the K12FramingBoardtofinishflushwith the outside surface of the timbers.
Insulation boards that have been individually cut to fit the stud spacings may be temporarily held to the battens with large headed clout nails.
An additional restraint to the boards will be provided by a plasterboard lining fixed to the inside face of the timbers.
When utilising K12 between studwork, the plasterboard lining should be of the vapour check type or a separate polythene vapour control layer used.
Ensure there is a tight fit between K12 framing board and the adjoining structure. Fill all gaps with expanding urethane sealant.

Brick Veneer Wall (External Side of Frame)

Framing board brick veneer applicationEnsure that stud spacings do not exceed 600 mm centres.
Attach appropriate wall ties to frame at spacings required for the masonry external leaf.
Fix Kingspan Kooltherm K12 Framing Board to the external surface of the frame structure ensuring vertical board joints coincide with a vertical member.
Ensure that the boards are lightly butted and continuity of insulation is maintained.
Use large headed galvanised clout nails or screws as fixings prior to the insulation boards being tied to the frame with an appropriate timber frame wall tie and insulation retaining disc.
Ensure that fixings are coincident with the underlying timber studs, top and bottom wall plates.
Construct the outer leaf of masonry in the conventional manner, using appropriate wall ties to hold the two wall leaves together.

Dwarf Wall – Insulation Between Studs

To restrain insulation boards from moving within the timber stud cavity, side nail battens to the stud to provide a 'stop'. This should coincide with board thickness, allowing the K12 to finish flush with the inside surface of the timbers.
Insulation boards that have been individually cut to fit the stud spacings may be temporarily held to the battens with large headed clout nails.
An additional restraint to the boards will be provided by a plasterboard lining fixed to the inside face of the timbers.
When utilising K12 between studwork, the plasterboard lining should be of the vapour check type or a separate polythene vapour control layer used.
Ensure there is a tight fit between K12 framing board and the adjoining structure. Fill all gaps with expanding urethane sealant.

Timber Clad / Tile Hung Timber Frame Wall

Insulating Sheathing Where the intended external cladding is to be timber boarding, K12 should be temporarily pinned in place with all joints tightly butted.
A breathable membrane (such as Dupont Tyvek Supro) is applied over the insulation boards and temporarily stapled or pinned in place. Preservative treated softwood counter–battens are fixed vertically to the wall structure at 600 mm centres.
The timber boarding system is then fixed to the counter–battens.
The counter–battens should be fixed at centres to coincide with the timber frame wall studs.
Application advice should be sought from the appropriate membrane manufacturer.
Timber boarding should be secured in accordance with the boarding manufacturer's recommendations.


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