As if supplying wall insulation systems wasn't enough, render giant Sto is now keeping out high-frequency radiation as well as winter weather. Working on the principle of the Faraday cage, Sto-Shield Mesh replaces standard mesh reinforcement with a mesh incorporating fine, woven stainless steel threads. The company claims it provides 99 per cent protection against 'electromagnetic smog' from high-voltage power lines, radar, radio and television transmitters that can interfere with sensitive equipment. Sto-Shield Mesh is intended for use with all StoTherm external wall insulation systems and StoVentec rainscreen cladding systems. Visit www. sto. co. uk for more information.