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The Manthorpe Circular Soffit Vent is an essential component for builders and homeowners looking to improve roof space ventilation and prevent moisture buildup. Designed for both new builds and retrofitting into existing soffits, it provides reliable airflow while blocking large insects. While the design is highly effective for standard soffit boards, users must ensure they have the correct hole saw size of 70mm to guarantee a secure, press-fit installation.
| Colour | White |
|---|---|
| Model Part Number | 916241 |
| Brand | Manthorpe |
These vents are designed to fit a standard 70mm diameter hole.
While the finish is white, you can use a plastic-adhesion primer and suitable exterior paint if you need to match a specific soffit color.
Yes, they are suitable for both timber and PVCu soffit boards, provided you can cut a clean 70mm hole.
They are designed to provide consistent passive airflow. For optimal results, ensure you have enough vents installed to satisfy building regulations regarding roof void ventilation.
The vents are constructed from UV-resistant materials specifically engineered to resist brittleness and discoloration caused by long-term sunlight exposure.
The hole may have been cut slightly larger than 70mm. Use a small amount of clear silicone sealant around the rim to secure the vent.
Ensure the soffit material is not warped and that no debris is inside the hole. Lightly sand the edges of the hole if it is slightly undersized.
Use a soft brush or compressed air to clear the vent slots from the exterior side.
To install the vent, first locate the desired position on your soffit board. Use a 70mm hole saw bit to drill the opening. Ensure the area around the hole is clear of debris or obstructions before pressing the vent into place. The friction-fit design is intended to hold the vent securely in the board; if the hole is slightly loose, a small bead of exterior-grade silicone adhesive can be used to ensure a permanent bond. For maintenance, simply inspect the vents annually. If you notice a buildup of dirt or debris in the slots, gently wipe them with a damp cloth or use a soft-bristled brush to clear the openings, ensuring the airflow remains unblocked.
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