Roofing felt provides the essential secondary weatherproofing layer beneath tiles and slates, protecting your roof structure from wind-driven rain, condensation, and debris. At McMahons, we stock a comprehensive selection of underlays and membranes suited to pitched roofs across residential, commercial, and agricultural buildings, ensuring long-lasting protection whatever the Irish weather throws at your project.
From traditional bituminous felts to advanced breathable membranes, our range covers every application and budget requirement.
For a complete roofing solution, browse our full Roofing & Ventilation Products range, including Lead Flashing & Roll for weathertight joints and penetrations.
Selecting the right underlay depends on your roof construction type, ventilation strategy, and local exposure conditions. Breathable membranes suit most modern warm roof builds, while traditional felt remains appropriate for ventilated cold roofs and non-habitable spaces. Consider the weight, lap requirements, and whether counter-battens are needed for your chosen product.
With nearly 200 years serving Irish builders, we understand that reliable materials and knowledgeable support make all the difference on site. Our branches stock leading brands at competitive trade prices, with expert staff ready to help you match the right membrane to your specification. Set up a McMahons trade account today to access trade pricing and streamline your ordering across multiple projects.
