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 of K12 framing board is a premium performance CFC/HCFC free rigid phenolic insulant of typical density 35 kg/m3.
K12 are manufactured without the use of CFCs/HCFCs and have zero Ozone Depletion Potential (ODP).
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 (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
(refer to 'Water Vapour Control').
If correctly applied, K12 framing board has an indefinite life. Its durability depends on the supporting structure and the conditions of its use.
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 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.
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).