Condensation remains one of the biggest hidden risks in pitched roof construction. When warm, moist air becomes trapped within the roof space, it can lead to timber decay, mould and costly call-backs. A well-chosen underlay is therefore critical — not just for weather protection, but for long-term roof health.
Air- and vapour-permeable membranes provide a simple, effective solution. By allowing both air and vapour to pass through, they help moisture escape before it can condense. To ensure compliance and peace of mind, roofers should always look for BBA certification for use in both cold and warm non-ventilated roofs, as well as NHBC approval confirming that no additional ventilation is required.
First introduced in 1996, Roofshield® from Don & Low set the benchmark for this technology — and continues to outperform not just competing underlays, but even conventionally-ventilated roofs.
Five reasons roofers trust Roofshield®:
- Exceptional water resistance – a durable barrier against wind-driven rain and snow.
- High breathability – prevents condensation and supports a healthy roof environment.
- Long-term durability – withstands UV exposure, temperature change and handling.
- Easy installation – no vents, no tapes, no extra fixings. Saves time and reduces materials on site.
- Sustainable choice – made using recyclable materials and backed by an Environmental Product Declaration (EPD) for full transparency.
After nearly 30 years of use in real-world UK conditions, Roofshield® remains a trusted, installer-friendly solution that cuts risk, saves labour and keeps roofs performing at their best.
