When waterproofing balconies before installing concrete, shingle lapping is particularly effective. While it may not be the most discussed aspect of construction, its importance cannot be overstated. Shingle lapping is a method that, when done correctly, can be the difference between a balcony that lasts and one that becomes a costly problem.
So, what exactly is shingle lapping, and why is it so essential? Let’s take a closer look.
1. Creating a Seamless, Continuous Barrier
Shingle lapping is a method of overlapping sheets of waterproofing membrane, similar to shingling on a roof. This overlapping creates a continuous barrier that prevents water from seeping through the joints. Without this overlap, even a small gap could allow water to penetrate, causing leaks and potential damage. Continuity is crucial in waterproofing; shingle lapping ensures the membrane remains unbroken and effective.
2. Enhancing Durability
The durability of your waterproofing installation depends on more than just the materials used; it also relies on how they are applied. Shingle lapping reinforces the seams of the membrane, making the installation more resistant to environmental stresses such as wind, rain, and temperature fluctuations. By strengthening these critical points, shingle lapping helps the waterproofing system withstand the challenges it will face over time.
3. Preventing Capillary Action
Water tends to seep into unwanted places through capillary action, where it is drawn into small gaps or cracks due to surface tension. This can be a significant problem in waterproofing. Shingle lapping addresses this issue by creating a physical overlap that blocks the water’s path, effectively reducing the risk of leaks caused by capillary action.
4. Improving Adhesion
It is essential for any waterproofing system to have proper adhesion. Shingle lapping creates overlapping layers that help the membrane bond effectively, ensuring it remains in place and maintains its protective qualities over time. This strong adhesion prevents the membrane from peeling or shifting, which could otherwise compromise the waterproofing.
5. Reducing Installation Errors
One of the practical benefits of shingle lapping is that it provides a clear guideline for installers. Following this method makes it easier to correctly position each sheet of membrane, reducing the chances of installation errors that could lead to leaks. A correctly installed shingle lap is not just more effective, but it also contributes to a more reliable overall waterproofing system.
6. Accommodating Thermal Movement
The materials used in construction must be able to move without losing their strength as buildings expand and contract with temperature changes. The shingle lapping design allows for slight movements within the membrane, helping to maintain a waterproof seal even as the building shifts. This flexibility is crucial for preventing cracks and leaks, especially in regions with significant temperature variations.
Bringing It All Together
Shingle lapping is a simple yet powerful technique in waterproofing, offering a range of benefits essential for a successful installation. Whether you’re dealing with residential balconies or larger commercial projects, understanding and implementing shingle lapping can make all the difference in the longevity and effectiveness of your waterproofing system.
At Formulated Materials, we’ve embraced the importance of shingle lapping in our Elevation S60 membrane . This product is designed with the principles of shingle lapping, ensuring a robust, leak-free installation that meets real-world conditions’ demands. When it comes to waterproofing, the details matter, and shingle lapping is one of those critical details you don’t want to overlook.
