Case Study

Recovering works on an Armley primary school renewing the fibre-cement slate roof with Permavent RED vapour-permeable underlay.

Holy Family Primary School, Armley, Leeds

A full re-roofing project of a primary school using Permavent RED vapour permeable membrane and Easy Valley

When Holy Family Catholic Primary School needed to replace and refresh their aging fibre-cement slate roof and the old blown windows they reached out to The Purple Roofing Company. The Purple Roofing Company was started in 2021 and their commitment to providing outstanding roofing services has already pushed them into a prominent and respected position both in their Yorkshire base and nationally. The project was completed over a 3-week period during the summer break to avoid disruption with health and safety requirements. During a difficult period in a worldwide pandemic, extra COVID-19 measures were in place during the completion of the project.

View products used in project


Armley, Leeds


To replace the fibre-cement slates with thin edge interlocking tile that closely matched the original slate thanks to the 40% reduction in thickness from regular tile, new batten and membrane underlay as well as given adequate cover for the window openings as the old roof windows are replaced.


Why Permavent Was Chosen:

Purple Roofing’s managing director Matthew Ford has been aware of Permavent and our range of class-leading products since his time in university, when he attended one of our popular CPD learning presentations.

When planning the project, Permavent RED was chosen to form the underlay for the new tiles, as well as cover for the window openings, because of its high-performance properties, including superior water-resistance that creates a barrier to wind and rain both during and following construction. The highly durable membrane is vapour permeable and an ideal fit for roofs that include existing ventilation as the Holy Family School roof does.

Matthew Ford said “In order to offer the confidence required in a 10-year insurance backed guarantee we insist on using the highest standard materials installed in compliance with any relevant regulations. Permavent products fit these company values while also providing a superior waterproofing solution while refurbishment works are ongoing for complete peace of mind.”


How Permavent Products Were Installed:

Permavent RED was installed as per the manufacturer’s instructions and building standards regulations, in compliance with BS5534 & BS5250.

Permavent also offered technical support if required, as well as advice on getting the best possible commercial deal available by utilising their extensive network of suppliers in the area to contact for the best materials and prices.

Accompanying Materials:

  • Permavent RED 160gsm
  • Permavent Easy Valley
  • Northstone Causway thin edge interlocking tiles in black
  • Velux Roof windows


Installer: Purple Roofing Co. Ltd.
Merchants: Rinus Roofing Supplies, Bradford

Products Used

Permavent RED

Ultra Strong vapour permeable Membrane

  • Superior tensile strength
  • Superior tear resistance
  • For use on any types of roofing/walling applications

Easy Valley

Unique dry valley system for slates

  • Extends the life of the roof by keeping battens dry
  • Anti-theft design with no scrap value