ABOUT Yep, everybody asks about the spelling of our name: It's Impervius not Impervious... It's the Latin, you see. The purest most accurate meaning of the word: Impervius meaning impenetrable. Can't get thorugh. Can't get around, can't get under. And it gives us that point of difference from all our competitors that you will come to know means excellent quality, excellent service and excellent prices. Meet Brad Ryan, the owner of Impervius Waterproofing Membrane, a Sydney based company. Brad is a 2nd generation waterproofer with 28 years experience in the construction industry. From multi-storey builds to single residences. Contact us today for more information.