Why Choose Sheet Membrane for Tough Underground Structures

When it comes to building underground structures, you have all the usual construction challenges coupled with fighting against the unpredictability of nature. Water infiltration, chemical exposure and changes in soil and rock formation present unique challenges for this kind of structure.

Choosing the most suitable waterproofing structure, material and application method is therefore essential for protecting its performance and longevity.

Enter sheet membrane. The high-quality, reliable, durable and water-proof solution, ready to act as a reliable shield for your structure against the underground elements.

About Sheet Membrane

Sheet membrane is a type of waterproofing material commonly used in construction. Its highly durable properties make it a popular choice when building tough structures.

To create a barrier against water and other elements, thin, continuous sheets of watertight material are laid over a surface. This waterproofing membrane provides a uniform thickness and does not rely on the applicator to check film thickness.

The most commonly used of all sheet membrane materials is bituminous (asphalt-based). But, sheet membrane is also available in PVC, rubber and polyurethane, among others.

Choosing a sheet membrane comes with a huge range of benefits for your project. These include superior waterproofing, durability and resistance, flexibility, ease of application, instant and reliable sealing and safety and environmental consciousness.

How Sheet Membranes Help Prevent Water Infiltration in Underground Structures

Sheet membranes work by forming an impermeable barrier between the elements and the surface they are protecting. They can fulfil the needs of even the most demanding below-ground structures.
Application methods vary from adhesion, heat welding, or mechanical fasteners, depending on the material. Regardless of your method of choice, using sheet membranes results in a continuous and seamless barrier to your underground structure and ensures there are no gaps that water can seep through.

Sheet membranes are known for their chemical resistance and water tightness. That’s what gives them such a solid reputation for protecting underground structures. By producing a robust and durable shield, sheet membranes effectively prevent potential water infiltration and moisture-related damage.

Why Sheet Membranes Are Effective for Challenging Underground Conditions

Building an underground structure is no mean feat. In fact, it presents a whole range of challenges you need to overcome.

Subsurface conditions can vary significantly, making predicting ground behaviour, stability, and bearing capacity challenging. Soil and rock formation must also be considered.

Additionally, underground structures can be more susceptible to issues such as movement, settling, cracks and leaks. These vulnerabilities emphasise the importance of durable, robust and long-lasting protection for your underground structures.

Sheet membranes are particularly effective in addressing these issues thanks to their resilient properties that can withstand structural tearing, puncturing, and cracking, ensuring the longevity of the structure.

Types of Membranes

There are two main types of membrane solutions: liquid and sheet. Each comes with different properties, optimal usage, strengths and weaknesses.

Liquid waterproofing will protect a surface for many years. They are cold-applied liquid membranes suitable for external flat and sloped surfaces. Applied by hand or sprayed onto surfaces, they provide a seamless finish for surfaces such as balconies and podium decks.

As discussed, sheet waterproofing is the preferred choice for underground structures. A more reliable option, sheet membrane, is applied in one continuous sheet, reducing the risk of joins or seams that water could penetrate. Contrastingly, liquid waterproofing can have gaps or weak points that are susceptible to water exposure.

Sheet membranes are also more durable than their liquid counterparts. This is particularly necessary for underground structures that are at a higher risk of mechanical damage, UV exposure, and chemical attacks.

Types of Sheet Membranes

Once you’ve settled on using sheet membranes as your waterproofing method, you need to choose the most suitable material for your structure: PVC, bitumen or butyl.

PVC

Highly resistant to water, chemicals and UV radiation, PVC is a flexible material with easy installation, making it ideal for protecting underground structures. The use of heat welding creates seamless joints and reduces the risk of leaks.

Bitumen

As one of the more popular choices, bitumen sheet membrane is a solid choice when high mechanical resistance, elasticity, thermal stability and durability are required.

They can be more difficult to apply in cold temperatures than other options and may be more sensitive to UV radiation depending on the type used.

Butyl

Often referred to as a rubber membrane, butyl is a material favoured in situations where there may be cold temperatures. It’s a highly flexible material, allowing it to adapt to changes in the structure.

The Advantages of Using Illawarra Industrial Supplies for Your Sheet Membrane Needs

Illawarra Industrial Supplies has over 120 years of combined experience and a highly trained team, equipping us with the knowledge to provide you with the best possible guidance on choosing the most suitable and cost-effective sheet membrane solution for your underground structure.

We pride ourselves on the comprehensive service we provide for our clients and always stay on top of technology and innovation developments. We are not a “sell and forget” company; instead, we provide technical support and address concerns. We distribute the best-known brands and most advanced products, ensuring that the solutions we offer are reliable and trusted.

Call (02) 4271 3888 or use the contact form on our website to speak to a waterproofing expert. We’re here to help!