Description

SWRS sarking screw – Through fixing for insulation and counter-batten on a roof or facade The SWRS screw with a cylindrical head and a double thread is designed specially for fixing counter-battens through an external thermal insulation assembly, using the sarking technique. Its design provides flush installation in the timber without pre-drilling, while maintaining the integrity of the insulation and the membrane. Product characteristics -Material: Steel with Supracoat 2C coating -Head: Cylindrical -Thread: Double thread with a plain central section -Coating: Supracoat 2C (anti-corrosion, outdoor use) -Ø thread at the point: 5 mm -Ø thread under the head: 4.2 mm -Ø head: 10.5 mm -Lengths available: from 210 mm to 480 mm -Bit: T-40 -Unit weight: from 39 g to 87 g depending on the length -Packaging: Box of 50 screws Advantages -Cylindrical head for flush installation without splitting the timber -Double thread providing optimal load transfer -Plain section limiting punching of the insulation and the membrane -Direct installation without pre-drilling -Suits rigid, semi-rigid or flexible insulation Applications -Support: timber -Element fixed: counter-batten through insulation Uses: -Fixing of counter-battens on a roof or facade -External thermal insulation work (ETI) -Installation of sarking assemblies on a timber support