PIR boards for external wall insulation systems (ETICS)
External wall insulation changes more than the heat balance of a house. It deepens window reveals, affects how far sills project and alters the proportions of façade details. PIR boards intended for external thermal insulation composite systems (ETICS) provide good thermal resistance in a slim layer beneath render. This can be particularly useful when renovating a building where you want to retain existing features.
Slim insulation for refurbishment
PIR foam conducts little heat, so it can provide the same thermal resistance in a thinner layer than a material with higher thermal conductivity. The difference matters alongside narrow passages, under short eaves or at windows set close to the outer face of the wall. A slim build-up can simplify the way these details meet the new façade. When comparing prices per square metre, include any extra work that a thicker wall would require.
ETICS boards have facings designed for the specified façade layers. A rendered finish lets you use the insulation performance of the PIR core while selecting a colour and texture that suit the surroundings of a home, guest house or business premises. Regular board sizes help with setting out the insulation around repeated window openings. A shallow reveal or a shop entrance on a narrow pavement leaves little room for a thicker façade. A slim layer gives the designer more flexibility and may limit the amount of work needed on adjacent features.
Comparing the cost of a complete system
To use PIR beneath render, select a compatible ETICS with the specified adhesive, fixings, reinforced base coat and finish. The system specification covers the steps from buying the insulation to completing the façade. It helps the owner define what the supplier must deliver, what the installer must do and which properties the finished insulation system should achieve. Quotations can then be compared on the same basis.
A properly sized insulation layer reduces heat loss through the walls during the heating season. Shallower new reveals can also help preserve the proportions of the windows. On a home extension or the refurbishment of business premises, this allows energy performance, everyday use and appearance to be considered together. PIR for ETICS is especially worth considering where the space around the façade or existing building details would be difficult to alter.
SteelProfil can help select PIR boards for a compatible façade system. Our wider range includes first- and second-grade materials and batches available from stock. We can check whether the particular batch suits your project and advise on current prices and promotions. Please tell us the façade area and the design insulation thickness.
