With a wide range of application options, you are sure to find an impermeable underlay here to suit your project’s needs. Roofing Supplies are pleased to offer a variety of thickness options, from lightweight entry-level underlays to extremely heavy-duty premium membranes. Don't forget we also sell a wide range of breathable membranes and vapour control layers! Should you need help in deciding which impermeable underlay is right for your job, call 01752 466151 or email us at sales@roofingsuppliesuk.co.uk to speak with a member of our expert team today.