Ensure your roof is protected from moisture, wind, and weather with our range of high-performance breathable roofing felt and membranes. At Mitcham Builders Merchants, we supply everything you need to create a secure, long-lasting roofing system—whether you're working on a pitched roof, extension, or flat roof refurbishment.

Our breathable felts allow moisture to escape from within the structure while preventing water ingress, helping to maintain a dry and healthy building interior. If you're looking to buy roofing felt for a quick repair or full roof install, we stock a variety of rolls suitable for different applications and roof types.

We also offer durable rubber membranes for flat roofs—ideal for long-lasting, seamless protection. If you're planning to buy rubber roofing membrane, our selection includes trusted products that deliver excellent flexibility, UV resistance, and weatherproofing.

Order online with fast UK delivery, or visit our Croydon branch to explore the full range of membranes and felts. Our expert team is here to help you choose the right solution for your roofing project.