200 Stainless Steel A2 Roofing Screws 4.5 x 20 mm TX20 with 15 mm EPDM Washer

Description

• Contents: 4.5 x 20 mm roofing screws; length measured from the outer edge of the pan head to the tip
• Quantity: 200 pieces
• Pan head with preassembled 15 mm sealing washer and EPDM seal
• Material: A2 stainless steel (material no. 1.4301, V2A)
• Drive: TX20 Torx
• Required quantity: approx. 810 per meter of sheet metal or translucent roofing panel
• The roofing screw should be driven approximately 30 mm into the wood

Properties of the roofing screw Material Our roofing screws are made of rust-resistant A2 stainless steel (V2A) to ensure durability and prevent corrosion. The sealing washer is made of EPDM (ethylene propylene diene rubber), which is UV-resistant and helps prevent dust and water from entering. Drive The roofing screw uses a TX20 Torx drive, which has the advantage of distributing force optimally across the entire surface. Uses Because of the material and sealing washer, roofing screws are used for exterior installation of roof panels. When used with translucent panels, plastic spacers must be placed under the panels to prevent deformation. When fastening corrugated and trapezoidal sheet metal, use profile caps to distribute the screw pressure effectively. Important information When fastening in the corrugation valley, there is a limited risk that water may collect in the drainage channel. Over time, water may penetrate the wood through capillary openings, which can damage the wood. It is better to fasten on the corrugation crest and use suitable spacers or profile caps. To determine the correct screw length, bear in mind that the screw should extend approximately 30 mm into the wood. Spacers and profile caps must also be included in the profile height calculation. The following rule of thumb applies for calculating screw length: Screw length = profile height + 30 mm Approximately 810 screws and spacers are required per square meter of roofing sheet.

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