Protect Membranes is a brand of construction membranes, roofing membranes and roofing accessories under the company Building Product Design Ltd (BPD). BPD has over 34 years of industry experience and they are acknowledged leaders in roofing ventilation and construction membranes, building ventilation and specialist building products. We stock their impermeable membranes, breathable roofing underlay, air and vapour control layers and more.