Waterproofing for Curved Curved

Waterproofing for Curved Curved

If you have a curved roof, you know how challenging it can be to find the right waterproofing solution. The unique shape of curved roofs presents several complications when it comes to preventing water infiltration. However, with the right strategies and techniques, you can ensure your curved roof stays watertight. In this article, we will explore different waterproofing solutions specifically tailored for curved roofs.

Waterproofing for Curved Curved
Waterproofing for Curved Curved 1

What makes waterproofing curved roofs difficult?

Before we delve into the various solutions available, it’s important to understand the reasons waterproofing curved roofs can be challenging. Here are some factors that contribute to the complexities of this task:

  1. Curvature: Curved roofs have a unique shape, which makes it more difficult to ensure a uniform waterproofing layer. The curvature can cause water to pool or collect in certain areas, putting those spots at a higher risk of leakage.

  2. Surface Preparation: The surface of a curved roof is often uneven, requiring extra care and attention during the preparation stage. Uneven surfaces can make it challenging to install waterproofing membranes effectively.

  3. Movement: Curved roofs are often subject to more movement compared to traditional flat roofs. The expansion and contraction caused by temperature fluctuations can put added stress on waterproofing materials, potentially compromising their effectiveness.

Now, let’s explore some waterproofing solutions designed specifically for curved roofs:

1. Liquid Applied Membrane (LAM)

Liquid applied membranes are an excellent choice for curved roofs due to their versatility and ability to conform to complex shapes. These membranes are specially formulated to provide a seamless and continuous waterproofing layer. Here are some advantages of using LAM for curved roofs:

  • Flexibility: LAM has excellent elongation properties, allowing it to accommodate the movement of a curved roof without cracking or delaminating.

  • Seamless Application: Liquid applied membranes can be easily and evenly applied to the curved roof surface, ensuring a consistent layer of protection.

  • Quick Drying Time: Some LAM products have short curing times, which means the waterproofing layer can be applied in a shorter timeframe.

2. Preformed Membrane Systems

Preformed membrane systems consist of factory-made, pre-shaped waterproofing materials designed to fit the contours of curved roofs. These membranes offer several advantages for curved roof waterproofing:

  • Precise Fit: Preformed membranes are manufactured to match the shape of the curved roof accurately, ensuring a tight and secure fit.

  • Durability: These membranes are made from high-quality materials that can withstand the movement and stresses associated with curved roofs.

  • Easy Installation: Preformed membranes are relatively easy to install, saving both time and labor costs.

  • Longevity: When installed correctly, preformed membranes can provide long-lasting waterproofing protection, reducing the need for frequent maintenance.

3. Hot-Applied Bitumen

Hot-applied bitumen is a popular choice for curved roof waterproofing, especially in regions with extreme weather conditions. Here are some notable benefits of using this method:

  • Superior Adhesion: Hot-applied bitumen has excellent adhesion properties, ensuring a strong bond between the roofing material and the waterproofing layer.

  • Thermal Stability: This method offers exceptional resistance to temperature fluctuations, making it ideal for curved roofs that undergo extensive expansion and contraction.

  • Cost-Effective: Hot-applied bitumen is an economically viable option, especially for larger curved roofs.

  • Proven Track Record: Hot-applied bitumen has been used for decades and has a proven track record for providing long-term waterproofing protection.


Q: How often should I inspect my waterproofed curved roof?

A: It is recommended to conduct regular inspections of your curved roof every six months. This will help identify any potential issues or signs of deterioration early on.

Q: Can I install the waterproofing layer myself?

A: While it is possible to install the waterproofing layer yourself, it is highly recommended to hire a professional Contractor with experience in curved roof waterproofing. Improper installation can result in water infiltration and costly Repairs in the long run.

Q: Can I use the same waterproofing solutions for all types of curved roofs?

A: The choice of waterproofing solution may vary depending on the material of your curved roof. It is essential to consult with a waterproofing expert to determine the most suitable solution for your specific roof type.


Waterproofing curved roofs requires careful consideration of the unique challenges posed by their shape and movement. Liquid applied membranes, preformed membrane systems, and hot-applied bitumen are all effective options for ensuring a watertight curved roof. By choosing the right solution and working with experienced professionals, you can protect your curved roof from water infiltration and enjoy its aesthetic appeal for years to come. Remember to conduct regular inspections and seek expert advice for any maintenance or repairs required.

Waterproofing Somerset West

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