Circular Soffit Vents Push-Fit Eaves Ventilation Disc (20 Pack) - Caramel

• Quick and easy fitting - push fits into 70mm hole
• Can be retro-fitted - use in new and existing soffits
• Strong and lightweight - made from durable polypropylene
• Strong and lightweight - made from durable polypropylene
• Complies with BS5250 - 4mm wide slots

ROUND PUSH-FIT SOFFIT VENTS (70MM) (Choice of pack size and colour) Quick and easy fitting round soffit vents for providing roof space ventilation at the eaves. Suitable for new builds and also retro-fitting to existing unvented soffit boards. Made from durable polypropylene and compatible with soffit board of any thickness. These circular soffit vents provide required ventilation, whilst avoiding excessive airflow resistance in the soffit, and preventing ingress of large insects. Features & Benefits Quick and easy fitting - push fits into 70mm hole Can be retro-fitted - use in new and existing soffits Strong and lightweight - made from durable polypropylene Flexible positioning - use for specific airflow needs Complies with BS5250 - 4mm wide slots Technical Information Base Diameter: 80mm Vent Diameter: 70mm Height: 15.5mm Material: Polypropylene Soffit Hole Diameter: 70mm Airflow: 2,150mm2 per vent. Equivalent Ventilation: 10,000mm2/M as one row at 200mm centres. 25,000mm2/M as two rows, with 86mm staggered centres. Certification: Satisfies requirements of NHBC, and complies with BS5250:2000, COSHH. Using the 70mm Circular Soffit Vents Fitting Advice Determine required airflow. Mono-pitch and dual-pitch roofs that arenâ€t used as living space and greater than 15°, require 10,000mm2/m. All other flat, mono and dual pitched roofs require 25,000mm2/m along each soffit. Space accurately and cut with care using a holesaw of 69-70mm - larger and the vent may not hold securely. Push the ventilator firmly into place. 10,000mm2/m airflow can be achieved using one vent every 200mm (allow 5 per metre). 25,000mm2/m can be achieved by staggering vents every 86mm in two rows (allow 12 vents per metre).