Over Fascia Vent - 1 Metre X 10mm² Airflow - 40 Pack
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Product Information
Full details
This guide is for builders, roofers, and DIY enthusiasts undertaking residential and commercial roofing projects. The B&Q Over Fascia Vent pack provides continuous roof eaves ventilation, preventing condensation and moisture damage. A key benefit is its ease of installation directly onto the fascia board. One caveat is that it offers 10mm of airflow, which may require supplemental ventilation in some specific situations. This product offers a practical and cost-effective solution for maintaining a healthy roof space.
All features
| Model Part Number | HS-1289-1-1 |
|---|---|
| Brand | B&Q |
Extended Product Information
FAQs
What is the primary purpose of these over fascia vents?
Their primary purpose is to provide continuous airflow at the eaves of a roof, preventing condensation, mould growth, and moisture damage within the roof space.
How much airflow do these vents provide?
Each 1-metre vent provides 10mm of continuous airflow.
Can these vents be used on both new and existing roofs?
Yes, they are suitable for new builds, extensions, and refurbishment projects.
Do I need a soffit for these vents to work?
No, these over fascia vents can be installed with or without a soffit.
What types of roofs are these vents suitable for?
They are suitable for both pitched and flat roof applications.
What are the dimensions of each vent?
Each vent measures 1 metre in length, with a width of 38mm and a depth of 20mm.
Will birds or insects get into my roof space through these vents?
The vents are designed to resist the entry of birds and large insects.
Are these vents compliant with building regulations?
Yes, this system fully complies with UK Building Regulations and British Standards.
Troubleshooting
Vent seems to be blocked by debris
Visually inspect the vent from the exterior and gently clear any accumulated leaves or nesting material. Ensure the roof felt is correctly installed to prevent major debris ingress.
Condensation still present in the roof space
Verify that the 10mm continuous airflow is maintained along the entire eaves length. Consider if additional ventilation (e.g., roof tile vents or higher airflow vents) is required based on the roof's pitch, insulation levels, and internal humidity.
Vent appears deformed or damaged
While durable, extreme forces could cause damage. Inspect for cracks or warping. If damaged, replace the affected section to maintain ventilation integrity.
Pros and Cons
Pros
- Effectively prevents condensation and mould growth.
- Easy installation directly on the fascia board.
- Suitable for a wide range of roof types (pitched and flat).
- Durable and lightweight construction.
- Complies with relevant building standards.
Cons
- Provides 10mm continuous airflow, which might be insufficient for very high-moisture environments without additional ventilation.
- Requires a minimum fascia depth for proper installation.
- Not designed for exposed applications where heavy weather impact is expected.
Setup, Compatibility & Care
Setup:
- Ensure the top of the fascia board is clean and level.
- Position the vent directly onto the fascia board.
- Secure the vent using appropriate fixings (not supplied, consult roofing guidelines).
- Allow the roofing felt to overlap the vent cleanly and extend into the gutter.
Compatibility:
- Suitable for both pitched and flat roof applications.
- Can be installed with or without a soffit.
- Compatible with standard roofing felt and gutter systems.
Care:
- No specific ongoing care is required beyond ensuring the ventilation path remains clear of debris (leaves, nests) through periodic visual inspection.