Sealing the window sill

Window sills that are installed on the outside of window and façade elements are often made from aluminium profiles, sometimes from natural stone or, in exceptional cases, from wood. It is important that the end pieces of aluminium window sills are impermeable to driving rain. If this is not the case, or if condensation is likely to occur underneath the window sill, a second waterproof layer must be created using a tub-shaped sealing film (e.g. TEROSON FO 3 SK1). The film is adhered to the substructure profile of the window element and is guided over the external insulation layer down to the façade plaster. This protects the insulation from moisture penetration.