Bulk Pack 12 x Cromar Vent 3 Light Breathable Membrane - 1m x 50m

Cromar Vent 3 Light Breathable Membrane – Bulk Pack of 12 Rolls (1m x 50m)

Protect your roof with Cromar Vent 3 Light, a top-performing breathable roofing membrane designed for lasting strength and weather resistance. This bulk pack includes 12 rolls, giving you coverage for large roofing jobs or ongoing projects.

Use it on slated, tiled, or metal roofs—whether fully supported or unsupported. It works as a second layer of defence, stopping rain while letting trapped moisture escape. Unlike traditional membranes, Vent 3 Light delivers both high water resistance and outstanding breathability in one lightweight solution.

Why is Vent 3 Light essential?

When rain slips past roof tiles, you need a strong backup. Cromar Vent 3 catches and redirects that water safely into the gutter. This keeps your roof dry and your insulation protected—preventing costly leaks and long-term damage.

How does it stay waterproof but breathable?

The outer layer blocks water completely. The middle layer acts as a high-quality breathable membrane, letting water vapour out of the roof space. The inner layer guards the structure from abrasion, increasing durability and keeping the system intact.

Key Benefits:

• Covers up to 600m² with 12 rolls (1m x 50m each)

• Waterproof outer layer for reliable weather protection

• Breathable middle layer allows vapour to escape

• Durable inner layer adds strength and abrasion resistance

• Lightweight and easy to handle

• Ideal for pitched roof systems with tiles, slates, or metal

• Works with warm or cold roofs

Roofers across the UK choose Vent 3 Light for its performance, ease of use, and lasting protection.
Don’t settle for basic underlay. Choose Cromar Vent 3 Light and build it right.

Order your bulk pack today

Get 12 rolls of trusted protection, delivered fast across the UK. Upgrade your roof with Cromar’s best.