What Waterproofing Membrane Is the Best for My Roof

What Waterproofing Membrane Is the Best for My Roof

Let’s take a closer look at the different types of roof waterproofing membranes. 


What Waterproofing Membrane Is The Best For My Roof

Waterproofing is a construction measure to prevent water infiltration into the building structure. Its importance is overlooked most of the time and assumed to be a costly affair. Though, the prevention of water-based damage reduces the need for future remedial work. Waterproofing is essential for any building, feature, or landmark that needs proper protection. 

Roofs are the most vulnerable parts of the buildings when it comes to water infiltration. It is subject to intense wear and tear and should last for 4-5 decades. It is crucial to add a supplementary waterproofing membrane to protect it against adverse climate. 


What Waterproofing Membrane Is Best for My Roof:

Roof waterproofing prevents possible leaks and mold formation. Thus, improving the performance and enhancing longevity. Research shows waterproofing accounts for only 1% of the building construction’s cost. When ignored, it can be responsible for 90% of the damage. However, it is vital to understand that not all waterproofing chemicals are suitable for all purposes. Therefore, always make sure that you get the right waterproofing membrane type.

Here are the 4 common types of roof waterproofing membranes:


Bituminous Membrane:

The bituminous membrane is a flexible protective coating known as asphalt coating. The bitumen-liquid membrane is well-known for its high-performance and low price. 

It is essential to use a bitumen membrane to complete the roof waterproofing process. Plus, chamfer tapes for corners leaks and drainage systems. It prevents water accumulation and makes concrete waterproof. 

Bitumen membrane is mixed elastomeric and plastomeric polymers to enhance its properties. It increases the durability and strength to withstand wear and tear. 

Unlike others, bitumen membranes are easy to maintain. It has a layer with a sticky substance on one side and a waterproof substance on the other side. It reduces installation errors because there is no multiple-layer installation. The bitumen membrane has the following advantages:

  • Odour-free
  • Easy and flexible to apply
  • Easy maintenance
  • Longevity


Cementitious Waterproofing:

The cementitious membrane consists of dry cement, sand, and liquid latex. These products are mixed at the construction site. The mixture turns into a cementitious fluid that is applied to the surfaces using a brush or a roller. The liquid latex plays a vital role in this membrane. It induces the waterproofing and flexibility of the product. 

A cementitious waterproofing membrane is common for its breathability. It is seamless to apply on concrete and masonry surfaces. 

It has the following advantages:

  • It`s long-lasting with a successful record of usage for past years. 
  • It can withstand any kind of water pressure.
  • It does not need heavy machinery.
  • It`s environment-friendly
  • It has good elasticity.



Polyurethane liquid waterproofing membrane is used for roofs subject to extreme weather conditions. This method is more expensive than other waterproofing membranes. 

The polyurethane waterproofing membrane is very sensitive to moisture content. So, it is crucial to be careful in evaluating the moisture content of the concrete slab. Otherwise, it may peel off after some time. 

It has many benefits, such as:

  • Higher flexibility
  • Decrease in the concrete’s water absorbency
  • Polyurethane membrane hardens the uppermost concrete surface. 


Liquid Waterproofing:

A liquid waterproofing membrane is a monolithic, fully bonded liquid coating. It is suitable for many waterproofing and roofing applications. It usually consists of a primer coat and two coats of topcoats applied by roller, spray, or trowel. When dried, it forms an elastic membrane capable of withstanding abrasion. It has the following benefits: 

  • Ideal for exposed roofs with complicated details and penetrations.
  • Breathable and releases water content trapped in the cracks and holes.
  • Protects the roof or foundation from mechanical damages. 
  • Cost-effective solution for roof repairs and renovations.
  • Seamless to apply in gaps, cracks, and voids. 
  • Durable
  • Rapid curing and excellent adhesion to all kinds of surfaces.
  • Concrete surfaces expand due to sunlight exposure. This liquid membrane expands with the concrete surface to prevent cracks and water penetration. 

At the end of the day, there are many types of waterproofing products on the market. Each has its significance in the durability, life, and functionality of the building. It is important to choose the right roof waterproofing membrane. Primarily depending on the size and location of the building. 

Consider the impact of a waterproofing membrane on the structural integrity of your building. And choose a reliable construction material and building materials supplier. 

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