Waterproofing membranes are designed to protect a surface from the perils of leakage. Water penetration and leakage, if neglected, can have disastrous consequences for a structure. A waterproofing membrane acts as a protective layer which can be applied either on the roof, retaining walls or basement of a structure. There are different types of waterproofing membranes which can be broadly classified as sheet-based membranes and liquid-based membranes. Sheet-based membranes are in the form of rolls whereas liquid applied waterproofing membranes come in the form of liquid that can be sprayed on the surface. Bituminous waterproofing membrane is one of the most common sheet-based membranes. This article discusses the APP waterproofing membrane – one of the most popular and high utility bituminous membranes, highly regarded for its applications on the roof. Let’s understand what this membrane is and why is it so popular.

What is an APP waterproofing membrane?

APP stands for Atactic Polypropylene. APP membrane is the most commonly used waterproofing material on concrete roofs and low-slope roofs. APP membrane is applied to asphalts with a torch. Applications of APP membranes aren’t limited to just roofs. Man made ponds, bathrooms, water tanks, curtain walls, concrete channels can be protected against water ingress with APP waterproofing membrane. APP membrane is a durable waterproofing material largely preferred by contractors for safeguarding surfaces against leakage.