Waterproofing is one of the most critical elements in any building project. It protects your home from roof leaks, damp, and long-term structural damage—especially in areas like flat concrete roofs, balconies, retaining walls, and underground foundations. Choosing the right waterproofing method can be a game-changer, particularly in a climate prone to heavy rain or high humidity. Two of the most widely used systems are liquid rubber waterproofing and torch-on membrane waterproofing. But how do they compare, and which is best for your home?

At Home Renovations and Repairs, we’re experts in both methods and believe in choosing the right solution based on your specific needs, not a one-size-fits-all approach. Let’s explore each option to help you make an informed decision.

What Is Torch-On Waterproofing?

Torch-on waterproofing involves the use of a polymer bitumen membrane that is heat-fused to a primed surface using a gas torch. It’s most commonly used for concrete slabs, balconies, parapets, and even underground walls. Once installed, it is coated with aluminium paint to protect it from UV degradation and to provide a clean, finished look.

This system is robust and has a proven track record, making it one of the go-to choices for long-term waterproofing. However, it does come with certain caveats. The application requires skilled installers due to the use of open flame. If not properly executed, the heat can damage the membrane or underlying surfaces, and safety becomes a concern in residential areas.

The Case for Liquid Rubber Waterproofing

Liquid rubber waterproofing is a more recent innovation and is rapidly gaining popularity due to its versatility. It’s applied as a liquid coating and can adhere to a wide variety of surfaces, including flat roofs, metal surfaces, and older waterproofed areas that need touch-ups.

One of its biggest advantages is that it is seamless—this eliminates the risk of water penetration at joints, which is a common issue with roll-on membranes. It also cures into a highly elastic rubber membrane that can withstand cracking, UV exposure, and minor movement in the structure.

Because liquid rubber is cold-applied, it’s far safer than torch-on systems. There’s no risk of fire or burns, and it can be used in sensitive or occupied buildings without worry.

Durability and Longevity

When installed correctly, both systems can last many years. Torch-on membrane is known for its durability and is often preferred for high-traffic areas like balconies. It resists root penetration and mechanical damage, which makes it great for areas under planters or rooftop gardens.

Liquid rubber, while newer, has shown excellent longevity in many real-world applications. Its elasticity allows it to handle structural movement and thermal expansion better than rigid membranes.

At Home Renovations and Repairs, we ensure both systems are applied strictly according to NHBRC specifications, which means you’re guaranteed a compliant and professional result no matter which method is chosen.

Cost Comparison

Torch-on waterproofing is generally more labour-intensive and requires skilled workers familiar with heat-based installation. This, combined with the cost of materials and aluminium coating, makes it slightly more expensive upfront.

Liquid rubber tends to be more cost-effective, both in terms of material and labour. The ease of application also means less time on site, reducing overall project timelines.

However, the cheapest option isn’t always the best. Factors such as roof structure, accessibility, and weather conditions all affect which method will be most efficient and long-lasting.

Versatility and Application Areas

One of the standout features of liquid rubber is its versatility. It can be applied on various substrates including metal, asphalt, wood, and even previously waterproofed areas. It’s ideal for irregular shapes or hard-to-reach spots where torch-on membranes can’t be easily installed.

Torch-on, while excellent for large, flat surfaces, is limited to areas where a torch can safely be used. Complex or confined spaces may not be ideal for this method.

We often recommend liquid rubber for flat roof repairs, roof valleys, chimney bases, and gutters, whereas torch-on is preferred for balconies, retaining walls, and under-floor slab waterproofing.

Safety Considerations

There’s no question that liquid rubber is the safer option. Its cold application eliminates the fire risk associated with torch-based systems. This makes it a better fit for renovations where the building is occupied or in areas where using an open flame poses a danger.

At Home Renovations and Repairs, safety is always a top priority. We use only trained professionals and follow strict NHBRC guidelines to ensure both your property and our workers are protected throughout the process.

Which One Should You Choose?

The choice between liquid rubber waterproofing and torch-on membrane waterproofing largely depends on:

• Type of surface
  
• Area size and accessibility
  
• Budget
  
• Aesthetic preferences
• Long-term vs. short-term use

If you’re looking for a durable, UV-resistant, and mechanically robust system for large, open areas, then torch-on might be the way to go. But if you need a versatile, safe, and seamless application for a roof or balcony repair, liquid rubber is likely the better option.

Our Expert Recommendation

With over 40 years of experience, Home Renovations and Repairs has worked on countless waterproofing projects across residential, commercial, and industrial properties. Our expert team will always begin with a thorough inspection and consult with you on the best solution tailored to your needs.

Unlike other companies that use quick fixes like the “pap and lap” method, we believe in long-lasting repairs done right the first time. Whether we recommend liquid rubber or torch-on, we only use premium materials and methods that adhere to building regulations and ensure a lasting result.

Final Thoughts

When it comes to waterproofing, both liquid rubber and torch-on systems have their merits. The best choice will depend on your unique situation, but with the guidance of a trusted expert like Home Renovations and Repairs, you’ll be well-equipped to make the right decision.

Don’t wait until water damage becomes a serious issue. Contact Home Renovations and Repairs today to book a consultation. Call us or email for expert advice, professional service, and waterproofing that lasts.