Vent-Flat Roof Terminal Aluminium Breather Vent

The Vent-Flat Roof Terminal Aluminium Breather Vent is intended to provide ventilation for suitable flat-roof build-ups where the design calls for a dedicated breather outlet. The spun aluminium construction creates a formed terminal above the roofing surface, and the outlet is incorporated into a correctly weathered roofing detail.

Aluminium breather vent for specified flat-roof designs

The current description gives approximately 180mm height, 240mm base diameter and 165mm aperture diameter. It mentions up to 25m² area per vent, but this should be treated as a supplier-specific guidance figure rather than an automatic design rule. The ventilation strategy depends on roof size, construction, moisture condition and exposure.

Product sizes and available options

• Item: Vent-Flat Roof Terminal Aluminium Breather Vent

Choosing the right materials

Flat roofs can suffer from trapped moisture, but adding vents without diagnosing the roof build-up may not resolve condensation or saturated insulation. A roofer or designer should establish whether the terminal is appropriate and how many units are required. The base must be compatible with the surrounding waterproofing membrane and deck details.

Installation and maintenance advice

Prepare the terminal penetration, flashing and membrane interface using an approved system. The exact sealing and attachment method depends on the roof covering. Do not cut through the waterproofing without a properly specified weathering detail, and arrange safe access for any work at height.

Related products and buying information

Explore flat roof ventilation terminals for related materials. For the rest of the project, compare roof ventilation components and choose suitable flat roof waterproofing systems. Further options and practical information are available through flat roof drainage outlets.

Frequently asked questions

What is a flat-roof breather vent for?

It provides a designated route for vapour or air in roof systems designed to use such ventilation.

What is this terminal made from?

The product is described as spun aluminium.

What are the listed dimensions?

Approximately 180mm high, 240mm base diameter and 165mm aperture diameter.

Does every 25m² of roof need one vent?

Not necessarily. Quantity and suitability must be checked against the manufacturer's and roof designer's guidance.

Will fitting a vent automatically fix condensation?

No. Moisture problems require assessment of the full roof construction and its causes.

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Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.