Choice is

Our roof underlays and ventilation solutions offer tried and trusted performance for any project. When you’re creating better buildings and healthy homes, choice really is everything.

Roofing underlays

  • One of the broadest ranges available from a single manufacturer, covering all underlay categories

  • Suitable for all types of pitched tile and slate roofs whether new build or refurbishment, across traditional and offsite construction

  • The range includes vapour permeable and airtight membranes, air and vapour permeable (Type LR), as well as impermeable (Type HR) underlays

  • Completely watertight with strong hydrostatic head of water resistance, acting as a secondary line of defence against wind-driven rain and snow

  • Excellent wind uplift resistance ratings to meet BS 5534 requirements, allowing unrestricted use throughout the UK and Ireland with no need for additional sealing tapes

  • Work hand in hand with associated roof ventilation products to deliver a complete solution from one source

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Ventilation solutions

  • Our roofing ventilation products work alongside our roofing underlays, helping to reduce condensation risk within the roofspace, in compliance with BS 5250 requirements

  • A wide selection of roofing ventilation products suitable for all tile and slate roofs, covering the cold or warm roof structure

  • Developed for over 35 years, our dedicated range of slate and tile ventilators are available with over 450 choices of tile or slate profiles, with a colour matching service

  • The range covers high- and low-level ventilation options including slate and tile ventilators, fascia, soffit, abutment, ridge and rafter ventilators

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Technical expertise

Our Technical team provides full support on the roofing underlay choice and associated ventilation strategy to suit both existing projects and new specifications. We offer a whole host of technical services including:

  • Design guidance

  • Building regulations advice

  • Product specification details and clauses

  • Condensation risk analysis

  • Take-offs

  • U-value calculations

For ventilation and roofing membrane solutions, send your elevation drawings and roof build-ups to

Success stories

"We decided to modify our specification for re-roofing and use an air permeable membrane to give a good level of ventilation. A lot of our homes were originally constructed without ventilation in their eaves, so this material promotes increased natural ventilation and creates a healthier home."

Daryl Reed, Building Surveyor, believe housing

Specify with confidence

A UK producer with superior performance and product innovation at the very heart of our business, Glidevale Protect benefits from more than 38 years of experience and technical expertise. All our products are designed and developed specifically for the UK and Irish market requirements under the ISO 9001 quality standard, with the company also accredited to the international health and safety standard
ISO 45001 and the environmental standard ISO 14001.

Our range of roofing underlays has been independently certified by BM TRADA, which provides verification of product performance to guarantee compliance with BS EN 13859-1 and 2. This ensures our products are approved by a notified UKAS accredited certification body, giving you peace of mind with a ‘right first time’ specification that ticks every box.

One size does not fit all

With the undoubted synergy between roofing underlay choice and ventilation, it’s crucial to work with a partner who can advise on the full solution. Our motto of ‘Build Tight, Ventilate Right’ provides reassurance that the roof can be fully protected whilst achieving the required airflow into the property, future-proofing the roof.

View our roofing underlay and ventilation technical article to find out more.

View article


Control of harmful condensation in roofs CPD

Delivered virtually, this presentation covers why roofspace condensation is a problem and the need for controlled ventilation, as well as detailing technical requirements and standards to BS 5250 and BS 9250.

Get in touch to find out more.

For technical guidance or to book an online presentation:

+44 (0)161 905 5700