Vent-Flat Roof Terminal Extra Aqua Breather Vent And Cap

The Vent-Flat Roof Terminal Extra Aqua Breather Vent and Cap is intended for roofing systems designed to use a breather outlet to help manage trapped moisture. It has a separate protective cap and formed base, so its waterproofing interface and location must be planned into the roof system rather than treated as a simple after-fit air vent.

Extra Aqua breather terminal for designed flat-roof ventilation

The existing listing describes a polypropylene body with grey base and white dome, approximately 197mm high, 267mm base diameter and 184mm opening. It also refers to an indicative coverage of up to 36m² per vent. That figure must be confirmed against the manufacturer's guidance and overall roof design before calculating the required number of units.

Sizes and available variants

• Product: Vent-Flat Roof Terminal Extra Aqua Breather Vent And Cap

Choosing the right version

Determine whether the existing roof has a correctly specified vapour barrier, ventilation strategy and sound insulation/deck materials. Moisture within old flat-roof layers can have several causes. A vent may form part of a remedial system, but it will not by itself fix leaks, rotten decking or a failed waterproofing membrane.

Installation and practical project advice

Any roof penetration requires a compatible waterproofing detail at the terminal base. Select a location that will not interfere with roof outlets, walkways or falls. Follow the manufacturer's current instructions for the cap, membrane interface and fixings, and use safe roof-access arrangements.

Related products and buying guidance

Compare flat roof ventilation terminals and browse roof ventilation products for other materials in the same project. You can also find flat roof outlets, together with flat roofing systems for more ideas and buying advice.

Frequently asked questions

What is an Extra Aqua breather vent?

A terminal intended to provide a designed ventilation or vapour escape point in suitable flat-roof systems.

What is the listed height?

Approximately 197mm.

What is the approximate base diameter?

267mm in the existing product information.

Can I fit one for every 36m²?

Only if that approach is supported by the manufacturer's and roofing designer's requirements.

Will it repair a leaking flat roof?

No. Leaks and defective materials require assessment and appropriate waterproofing repair.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

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.