Type-W Vent Extender Duct £49.00 ex VAT / pack of 50 Type-W Vent Extender Duct £49.00 ex VAT / pack of 50 Type W Extension Duct - Translucent. 50 ducts to a box. Extension duct for connection to rear of Type-W Vent to provide lengthened version to service masonry skins of increased thickness. Can be cut on site if required.DIMENSIONS: 200/225 x 65 x 10mmAIR FLOW RATING: 300mmĀ²MATERIAL: PolypropyleneBOXED: Packs contain 50 extensions £49.00 ex VAT Buy online now Find nearest stockist Resources View all related documents Instructional videos Installation Videos A series of tutorials explaining how to install SureCav Read more SureCav Brochure All PDF Drawings Certifications BBA Certificate Brochure Design Handbook Instruction Sheets .pdf BBA Certificate All PDF Drawings Certifications BBA Certificate .pdf Installation Instruction Sheet All PDF Drawings ICF SFS Timber/SIP Frame Traditional Block and Render Brick Flint Stone Instruction Sheets .pdf SureCav Pocket Guide All PDF Drawings Installation Guides Brochure Design Handbook Instruction Sheets .pdf Ventilation Requirements All PDF Drawings Cavity Ventilation Certifications BBA Certificate Ventilation Requirement .pdf Embodied CO2 Embodied CO2 Cals Planet Mark Certificate .pdf Typical details for SureCav25 and Brick All DWG Drawings All PDF Drawings Brick .pdf .dwg SureCav Typical Details (Stone outer leaf/block inner) All DWG Drawings All PDF Drawings Traditional Flint Stone .pdf .dwg Typical details for SureCav and Timber-Frame All DWG Drawings All PDF Drawings Timber/SIP Frame In Use Block and Render Brick Flint Stone .pdf .dwg Related Products SureCav 50 The 50mm cavity spacer system. Creates a guaranteed clear, dry, moisture and mortar free BBA approved 50mm residual cavityPanel size: 1200mm x 450mm x 50mm £150.00 ex VAT Add to cart SureCav 25 The 25mm cavity spacer system. Creates a guaranteed clear, dry, moisture and mortar free BBA approved, 25mm residual cavity Panel size: 1200mm x 450mm x 25mm £150.00 ex VAT Add to cart Washers Washers are used when installing SureCav on timber/SIP frame buildings to create a watertight seal. 5 per panel recommendedSize: 6mm diameter hole x 10mm deep £11.00 ex VAT Add to cart Type-W Vent Achieves 1500mm2 per linear meter BBA ventilation requirement, when installed every 0.5m high and low with these ventsSize: 105/115mm x 65 x 10mm £24.00 ex VAT Add to cart