When it comes to choosing the right roofing system for your home or commercial building with a flat roof, hot mop roofing stands out as a durable and cost-effective option. But what exactly is hot mop roofing, and why should you consider it for your property? In today’s blog, we will go over what hot mop roofing is and the many perks it offers.

What is Hot Mop Roofing?

Hot mop roofing, also known simply as hot mopping, is a method of installing a roof by using hot liquid asphalt (tar). This process involves laying down a base layer of felt, which is then saturated with hot liquid asphalt. The asphalt is poured onto the roof and spread out using a large mop—hence the name “hot mop.” This method creates a thick, waterproof layer that effectively seals the roof against moisture.

What is Hot Mop Roofing Used For?

Hot mop roofing is predominantly used for flat or low-slope roofs, which are common in commercial buildings but can also be found in some residential homes. These types of roofs require a waterproof system to prevent water from pooling and causing damage. Hot mop roofing provides a seamless barrier against water infiltration, making it an ideal solution for these applications.

Perks of Hot Mop Roofing

Excellent Waterproofing

One of the primary benefits of hot mop roofing is its exceptional ability to provide a watertight seal. The hot liquid asphalt seeps into section, creating a solid barrier against moisture. This is particularly important for flat roofs, where water can easily accumulate.


When properly installed, hot mop roofing can last between 15 to 20 years, making it a long-lasting option for property owners. Its thick, multi-layered application makes it highly resistant to wear and tear from weather elements.


Compared to other roofing methods, hot mop roofing is generally more affordable. This cost-effectiveness makes it an attractive option for homeowners and business owners alike who are looking to save on roofing expenses without compromising on quality.

Fire Resistance

Hot mop roofs offer a good level of fire resistance due to the properties of the asphalt used in the process. This can be a crucial safety feature, especially in areas prone to wildfires.


Hot mop roofing is versatile and can be applied to a variety of roof shapes and sizes. It can easily be adapted to roofs with multiple penetrations, such as vents and skylights, ensuring a tight seal around these critical areas.

Smooth Finish

The application process of hot mop roofing results in a smooth, even finish. This not only looks aesthetically pleasing but also makes maintenance easier. The smooth surface prevents debris from accumulating, which can be particularly beneficial in maintaining the roof’s integrity over time.

Energy Efficiency

When combined with reflective coatings, hot mop roofs can contribute to better energy efficiency for your building. Reflective coatings help to reduce heat absorption, keeping the building cooler and lowering energy costs.

Low Maintenance

Hot mop roofing requires minimal maintenance compared to other roofing systems. Regular inspections and occasional cleaning are usually sufficient to keep the roof in good condition, reducing the long-term maintenance costs.

How California Energy Contractors Can Help

At California Energy Contractors, we pride ourselves on offering top-notch roofing solutions tailored to your specific needs. Our team of experienced professionals is well-versed in the installation of hot mop roofing systems, ensuring a high-quality, durable, and watertight finish for your property. We are committed to providing services that enhance the safety and longevity of your home or business.

If you are considering a hot mop roof for your property, look no further. Contact us today to learn more about our roofing services and how we can help you achieve the perfect roofing solution. For a FREE estimate, give us a call at (855) 779-1413 or fill out our form here.