Soffit Vent Strip

• Efficient, unobtrusive and easy to fit
• 4mm wide slots comply with BS 5250: 2021 
• Durable and totally resistant to decay 
• UV stabilised and colourfast

• Satisfies all NHBC requirements
• Manufactured to BS EN ISO 9001 and BS EN ISO 14001
• Complies with all relevant Building Regulations
• Meets all relevant British Standards

• Manufactured by extrusion in UPVC.
• Available in white or brown – product 1137 also available in black.

Soffit Vent Strip (10mm airflow)

G20 Carpentry/Timber Framing/First Fixing

Clause 910^ EAVES SOFFIT VENTILATION 

• Manufacturer: Timloc Building Products, Timloc House, Ozone Park, Howden, East Yorkshire, DN14 7SD. T: 01405 765567 W: www.timloc.co.uk 
• Soffit boards: Fix to leave a continuous ventilation opening not less than 10mm wide for full length of eaves 
• Fit a propriety Soffit Vent Strip Type C across the required opening to prevent large insect entry.
• Product Reference: 1137
• Type: Soffit Vent Strip 2.4m Type C (10mm Airflow) 
• Colour: (Black, White, Brown)

Soffit Vent Strip (25mm airflow) 

G20 Carpentry/Timber Framing/First Fixing 

Clause 910^ EAVES SOFFIT VENTILATION 

• Manufacturer: Timloc Building Products, Timloc House, Ozone Park, Howden, East Yorkshire, DN14 7SD. T: 01405 765567 W: www.timloc.co.uk 
• Soffit boards: Fix to leave a continuous ventilation opening not less than 25mm wide for full length of eaves 
• Fit a propriety Soffit Ventilator Strip Type C across the required opening to prevent large insect entry
• Product Reference: 1138 
• Type: Soffit Ventilator Strip 2.4m Type C (25mm Airflow) 
• Colour: (White, Brown)

• Use product 1137 to ventilate pitched roofs, where the pitch of the roof is 15 degrees or more, and the roof void is attic or loft space.
• Use product 1138 to ventilate pitched roofs, where the pitch of the roof is less than 15 degrees, flat roofs or any roof where living accommodation is contained within the roof space.
• Ideally the soffit board should be 6mm in thickness. Thicker boards up to 9mm can be accommodated with care, but it may be necessary to chamfer the edge of the board to make installation easier.
• Ensure the ventilator is fixed securely to the back of the fascia board using all the fixing holes provided. Screws are preferable, but nails may be used with care.
• Ventilation must be provided for the full length of the eaves and along both sides of the building to create a cross flow ventilation action.

• Determine whether the roof design requires ventilation equivalent to a continuous 10mm opening (product 1137), or 25mm opening (product 1138).
• Specify which colour is preferred.
• Measure the overall length of the eaves to be ventilated and divide by 2.4m to determine the number of lengths required.

Product 1137

Provides ventilation equivalent to a continuous 10mm opening (10,000mm2 per metre run). 

Product 1138 

Provides ventilation equivalent to a continuous 25mm opening (25,000mm2 per metre run). 

Both products are supplied in 2.4m lengths.