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MAPM901
70mm Round Soffit Vent White M901
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70mm Round Soffit Vent White M901
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£0.44
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£0.37
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Description
Reliable Roof Space Airflow with the 70mm Round Soffit Vent White M901
Maintaining healthy air circulation inside a roof void is one of the most critical steps in protecting any building from long term structural decay. Without steady, passive airflow, warm moist air from living spaces below naturally drifts upward into unheated loft areas. When that vapour strikes cold roof timbers and roof underlay, it condenses into water droplets, eventually causing wet rot, ruined insulation, and costly mould growth. The 70mm Round Soffit Vent White M901 delivers a simple, efficient, and discreet solution to keep air moving steadily across roof eaves.
Designed specifically for both brand new building projects and fast remedial upgrades, this push fit circular ventilator ensures that external air enters the eaves void smoothly. It directly relieves trapped moisture while actively preventing unwelcome pests from gaining access to the roof timbers. The clean white plastic finish blends unobtrusively into standard PVCu, timber, or composite soffit boards, giving your roofline an orderly, professional appearance that stands up to demanding British weather conditions year after year.
Whether you are tackling a comprehensive fascia and soffit replacement or resolving loft condensation problems in an existing property, this ventilator makes roofline maintenance hassle free. It can be slotted directly into new boards prior to fitting or retrofitted in situ using a standard hole saw cutter, providing an economical way to meet essential roof ventilation standards without complex timber modifications.
Why Choose Circular Push Fit Eaves Ventilation
Traditional continuous strip vents can be time consuming to align and cut, especially when carrying out quick repair work on older rooflines. Circular eaves ventilators offer exceptional flexibility, allowing you to position ventilation exactly where it is needed along the run of the roofline.
- Targeted Moisture Reduction – Promotes natural cross ventilation through the roof void to evaporate condensation before it damages structural rafters or ceiling insulation.
- Effective Insect and Bird Screening – Moulded internal grille apertures stop nesting birds, wasps, and large beetles from crawling into warm attic areas while still permitting free airflow.
- Quick Installation – Engineered with a snug push fit rim that grips securely into pre-drilled holes, eliminating the need for messy adhesives, specialist clips, or visible screw heads.
- Weatherproof Construction – High quality white plastic resists UV degradation, cracking, and rot, keeping its neat finish through driving rain, winter frost, and summer sunshine.
- Flexible Spacing – Calculate and install the exact quantity of vents needed along your eaves run to achieve airflow equivalent to continuous 10mm or 25mm opening requirements.
Simple Four Stage Installation Workflow
Stage 1: Measuring and Spacing Layout
Assess your roof ventilation requirements by checking the width of your eaves and roof pitch. Mark out regular intervals along the underside of the soffit board. Consistent spacing ensures uniform airflow across the attic space while maintaining a tidy, balanced visual finish along the exterior roofline.
Stage 2: Cutting the Apertures
Using a standard 70mm hole saw attached to a power drill, cut neat circular openings through the soffit board at your marked locations. Support the board firmly to avoid splintering timber or cracking PVCu. Smooth away any rough burrs or loose swarf around the cut edge.
Stage 3: Fitting the Ventilator
Offer the 70mm Round Soffit Vent White M901 up to the opening and press it firmly into position until the outer rim sits flush against the board. The integral side ribs bite into the sides of the hole, securing the vent firmly without requiring messy mastic or screws.
Stage 4: Checking Loft Airflow
Inspect the installation from inside the roof space if accessible to ensure that mineral wool insulation or eaves trays do not directly block the rear grille. Clear unobstructed openings allow cool outside air to sweep through the attic floor and vent condensation away freely.
Practical Advice for Retrofit Remedial Work
If your home currently suffers from condensation droplets forming on roof felt during cold spells, retrofitting round soffit vents is one of the most cost effective remedies available. Because these units push directly into the soffit from the outside, you do not need to pull off existing gutters, remove tiles, or dismantle the eaves structure.
For properties requiring airflow equivalent to a continuous 10mm opening along the eaves, spacing circular soffit vents at calculated regular centres provides full Building Regulation compliance for standard pitched roofs above 15 degrees. Always ensure that the internal loft insulation does not sit directly over the vents, as keeping a clear 25mm air gap above the insulation roll allows incoming fresh air to circulate without restriction.
Technical Specifications
| Specification | Rating or Standard | Practical Details |
|---|---|---|
| Product Model | M901 Series | Manufactured to standard roofline dimensions for broad trade compatibility |
| Aperture Cutout Diameter | 70mm | Fits standard 70mm hole saw cutouts cleanly in plastic, timber, and composite |
| Overall Face Diameter | Approx 80mm | External collar flange overlaps hole edges to disguise minor cutting imperfections |
| Material Construction | Moulded Polypropylene | Durable, weather resistant plastic that will not rot, warp, or crack over time |
| Colour and Finish | White Gloss | Matches standard white PVCu fascias and soffit boards seamlessly |
| Ventilation Type | Open Grille Flow | Provides balanced passive airflow while filtering out large airborne debris |
| Fixing Method | Friction Push Fit | Side retention lugs secure the vent in place without screws or sealants |
| Insect Protection | Integrated Flyscreen Slits | Narrow slot geometry bars entry to birds, wasps, hornets, and nesting insects |
| Packaging Unit | Single Unit | Sold individually to let you purchase the exact count needed for your project |
Frequently Asked Questions
How many soffit vents do I need along my roofline?
For standard roof ventilation equivalent to a continuous 10mm gap, you generally require circular 70mm vents placed roughly every 200mm along the run of the soffit board. The exact quantity depends on your roof design, roof pitch, and whether cross ventilation is also present on the opposite eaves or ridge.
Can these vents be installed on existing soffits without dismantling anything?
Yes, they are ideal for remedial retrofit applications. Simply drill a 70mm diameter hole straight into your existing wooden or plastic soffit board from below and push the vent firmly in place until the collar seats against the underside.
Do I need glue, screws, or silicone sealant to hold them in place?
No extra fixings are necessary under normal circumstances. The body of the vent features moulded push fit ribs that compress slightly as the unit enters the hole, creating a firm friction grip that resists wind and vibration.
Will these ventilators keep out wasps and bees?
The grille features narrow slotted openings designed to prevent the ingress of nesting birds, mice, and large insects including wasps, while maintaining free air movement through the unit.
Need Advice on Your Roof Ventilation Project?
If you are unsure whether the 70mm Round Soffit Vent White M901 meets your specific building ventilation requirements or need help estimating unit quantities, our knowledgeable team is here to assist you.
Contact Our TeamSpecification
| Finish | White |
|---|---|
| Dimensions | 70mm dia |