Roof underlays - the roof under a roof 

Roof felt forms an important second line of defence for all tile and slate pitched roofs. It also becomes a primary weather shield during roof construction. A well-designed membrane prevents heat loss, adding to the heat efficiency of any modern or renovated building.  

Marley roof underlays offer superb wind-uplift resistance and along with the integrated tape system, each product allows for use across all UK wind zones, in compliance with BS 5534, ensuring that tearing of the roof underlay and the risk of damage to the roof coverings is prevented.

What are the benefits of Marley non-breathable and Marley breathable membrane installation? 

Both the non-breathable membrane preferred in constructions with traditional ventilation methods, and the breathable roof membrane used where the transfer of moisture vapour from roof space is required, offer multiple features to promote consistent installation to the British Standard. There is no need for the laps to coincide with tile batten courses. It makes the installation of our membranes easier and quicker, whilst reducing wastage - adding to the cost efficiency of your project.

What type of roofing can I use Marley roof underlays on?

The manufacturing process used to produce our roof underlays ensures the layer is ultra-strong and durable, making both products suitable across various ventilation applications, both hot and cold roof constructions, and in conjunction with universal eaves vent systems or felt support trays at all gutter details. Marley membranes are designed to integrate either as part of a complete Marley roof system, or used in conjunction with other manufacturers’ tiles and slates. 

For more information on our vapour permeable and non-breathable underlays visit our product pages below. You can also contact your local specialist to discuss your project needs using Marley products.