Cement-free with maximum crack and impact resistance, the StoTherm Classic external wall insulation system has been installed throughout Europe for over 40 years.
At 50-60 Joules, StoTherm Classic has the greatest impact resistance within the external wall insulation industry.
StoArmat Classic, a flexible, acrylic intermediate render is used in conjunction with Sto-Glass Fibre reinforcing mesh, expanded polystyrene and Stolit acrylic finish render to achieve this outstanding impact resistance.
The original thin coat acrylic render, Stolit, is highly elastic and resilient to mechanical stress. High quality raw materials give Stolit optimum adhesion, low water absorption and high vapour permeability.
Independent testing of the impact resistance of StoTherm Classic external wall insulation system with StoArmat Classic reinforcing render was carried out by the German building research establishment: Ingenieurgemeinschaft Bauforschung Schaefer & Oberhaus, Dortmund.
Download Report "Resistance to impact with a hard body – testing in accordance with ETAG 004 section 5.1.3.3"