Sealing Sewer Access Chambers or manholes can often become necessary and are caused by many factors, poor construction, faulty concrete, produced without proper dewatering of site during construction or removal of dewatering pumps too early and of course age and exposure to aggressive conditions. EXTERNAL Waterproofing Access Manholes: Preparation –  clean external walls, fats, greases, … Continue reading Sealing Sewer Access Chambers – Manholes