Hot Fluid Applied Waterproofing

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Hot fluid applied waterproofing involves heating a rubberized asphalt compound to a specific temperature and then applying it in liquid form to your roof or balcony. Once applied, the material cools and solidifies into a tough, rubber-like coating that keeps water from seeping through the roof. Hot fluid applied systems are the perfect service for flat roofs, plaza decks, or any roof in an extremely wet area where durability and waterproofing matter.

The Benefits of Hot Application Roofing from On Top

Extra Rooftop Protection

One of the standout advantages of hot fluid applied waterproofing is that it creates a completely seamless coat across the roof surface. Unlike sheet-based systems that rely on overlapping seams—which can be vulnerable to leaks—a hot fluid coating has no weak points. Having this layer reduces the risk of water leaks, even in tricky areas like tight corners and drains.

Exceptional Durability and Flexibility

Hot fluid applied membranes are made from rubberized asphalt compounds that are both tough and flexible. Once they dry, the hot fluid waterproofing is highly resistant to punctures or tears—which means it’s ideal for a roof that has foot traffic, heavy equipment, or harsh weather conditions. Your coated roof will also stay elastic over time, expanding and contracting without cracking. That matters when you live somewhere like Utah and have regular freeze-thaw cycles. Your coating will be able to withstand that for years to come.

Long-Term Cost Efficiency

When you get hot waterproofing for your roof, you’re protecting your roof and doing so in a very cost-efficient way. Because this coating prevents leaks, degradation, and mechanical damage so effectively, they typically require fewer repairs and less frequent replacement. That also means your roof needs fewer repairs or a full-blown replacement.

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Hot Fluid Applied Waterproofing FAQs

What is hot fluid applied waterproofing?

Hot fluid applied waterproofing is a roofing and waterproofing service On Top offers where rubberized asphalt is heated to a high temperature and applied in liquid form to a surface. Once applied, it cools to form a seamless, flexible membrane that provides long-lasting protection against water intrusion.

What is the difference between hot and cold applied waterproofing?

The main difference lies in the method and temperature. Hot applied systems use rubberized asphalt heated to around 350°F and are applied while hot. This creates a monolithic, highly durable membrane. Cold applied systems use liquid membranes that cure at regular temperatures. They’re easier to handle in tight or confined spaces but may require more time to cure. Generally, hot systems are tougher, while cold systems are great for small, detail-sensitive work.

When to use fluid-applied waterproofing?

Fluid-applied waterproofing is a smart choice when the project needs a tough protective surface on the roof. That’s often plaza decks, flat commercial roofs, or inverted roofs. You might also choose this protection if your roof includes irregular shapes or gaps where traditional sheet membranes may be difficult to apply effectively.