Waterproof & Dry are the UK’s trusted independent suppliers of Delta® Membrane Systems. It is our mission to make Delta® Membranes available online at the best prices with next day delivery. Delta® membrane systems are recognised around the globe for their quality. They are manufactured by Dörken, the world's largest manufacturer of cavity drain membranes. Waterproof & Dry are proud to be the biggest independent online supplier of Delta® Membrane Systems. We stock a wide range of Delta® Products covering everything from basement waterproofing systems to sump pumps, tanking products to damp proofing membranes.