PIR boards for external wall insulation systems (ETICS)
Adding external insulation changes the depth of the wall at windows, balconies and eaves. PIR boards intended for external thermal insulation composite systems (ETICS) can deliver the required thermal resistance with a relatively slim build-up. This is an option for both refurbishment and new homes, particularly where clean edges and carefully proportioned details define the façade.
Shallower reveals and slimmer edges
For the same thermal performance, PIR can be thinner than insulation with a higher thermal conductivity. Around windows this limits the extra reveal depth and helps keep the proportions of the opening. Beneath short eaves or on a narrow balcony, a slimmer build-up makes better use of the space available. Size the insulation for the target thermal resistance and check its fit against the building geometry. A smaller projection may also help where a renovated section meets an area of the façade that is being retained.
A facing matched to the system
Façade boards have facings designed for the layers beneath the render. The glass fleece facing on termPIR ETX boards is one example. In the finished wall, insulation, adhesive, reinforced base coat and finish each have a defined purpose. Use the complete compatible ETICS specified for the board. Its instructions give the installer a defined method and set out how to achieve the required façade performance.
An even base across the wall
Rigid boards retain their shape during installation and can be fitted accurately at corners. Regular formats help set out joints and plan cuts at openings. Choose an edge detail appropriate to the system. The result is an even insulation layer ready for the following coats. The lightweight core is practical on the upper parts of a façade, and the slim section helps with narrow strips around junctions. Setting out corner cuts in advance helps keep adjoining wall faces aligned for a consistent rendered finish.
Options for refurbishing an existing façade
Consider PIR for ETICS where thicker insulation would require extensive changes to sills, flashings or a junction between two parts of a building. A slimmer layer can preserve the outline and limit new projections while improving thermal comfort indoors. Render gives the façade a conventional appearance, so an efficient core can be used without imposing an industrial finish. The system can suit both uninterrupted wall areas and carefully detailed changes of plane.
SteelProfil supplies façade PIR boards and complementary materials. Ask about current prices, promotions and availability from stock. Our range includes first- and second-grade materials. Choose a board compatible with your rendered insulation system and the finish you have planned for the renovated façade.
