Description
Strotex Q-Medium Breathable Membrane 150g – 50m x 1m | CE Certified Roofing & Wall Membrane
Strotex Q-Medium 150g Breathable Membrane – Premium Roofing Underlay for Superior Weather Protection
The Strotex Q-Medium Breathable Membrane 150g (50m x 1m) is a premium-quality roofing and wall membrane designed to provide exceptional protection against moisture, wind, rain, and airborne contaminants while allowing water vapour to escape from within the building. Manufactured to British Standards and CE Certified, Strotex has earned its reputation as the gold standard in breathable roofing membranes.
With its robust 150g/m² construction, the Strotex Q-Medium offers a specification that has no direct market equivalent, making it the ideal choice for roofing professionals seeking enhanced durability, strength, and long-term performance.
Why Choose Strotex Q-Medium?
- Premium 150g/m² breathable membrane
- Roll size: 50m x 1m (50m² coverage)
- British Standard Approved
- CE Certified
- No equivalent specification currently available on the market
- Excellent vapour permeability to reduce condensation
- Provides outstanding resistance to wind-driven rain
- Strong, durable and tear-resistant construction
- Suitable for pitched roofs, timber frame walls and external cladding systems
- Quick and easy to install
Superior Performance Compared to Standard Membranes
Strotex breathable membranes are manufactured to a higher specification than many competing products:
- Strotex 95g – Higher specification than standard market alternatives
- Strotex 115g – Outperforms equivalent membranes
- Strotex 135g – Higher specification than comparable products
- Strotex 150g – No direct market equivalent
- Strotex 170g – Exceeds equivalent market membranes
- Strotex 220g – Industry-leading specification, outperforming all other breathable membranes available
Advanced Moisture & Weather Protection
The Strotex Q-Medium Breathable Membrane forms an effective secondary protective layer beneath roof coverings and external cladding systems. It prevents moisture that penetrates the outer layer from reaching the building structure while allowing trapped water vapour to escape, helping reduce condensation and maintain the effectiveness of insulation.
It also helps protect against:
- Wind-driven rain
- Moisture ingress
- Dust and dirt
- External environmental contaminants
This combination of breathability and weather resistance helps extend the lifespan of your roof while improving the overall performance of the building envelope.
Product Specifications
- Brand: Strotex
- Product: Q-Medium Breathable Membrane
- Weight: 150g/m²
- Roll Size: 50m x 1m
- Coverage: 50m²
- Certification: CE Certified
- Compliance: British Standards
- Colour: As shown in the second product image
The Strotex Range
Whether you’re working on a new build, extension, or roof refurbishment, the Strotex range offers a breathable membrane to suit every application. For heavier-duty projects, Strotex also offers 170g and the premium 220g 4-layer fully permeable membrane, delivering even greater durability and weather protection.
Choose the Strotex Q-Medium 150g Breathable Membrane 50m x 1m for a professional-grade roofing underlay that combines exceptional breathability, outstanding strength, and long-lasting protection for residential and commercial roofing projects.

