I’ve got a lot of questions from my fans, about hot mopping and they just want to know more about the term “hot mopping.” What is it, and is it something that most roofers actually works with?
The word “hot mopping” is referred to as the method of putting together a built-up roof. A built-up roof involves building it up one layer at a time, starting with a layer of felt and then adding layers of asphalt.
The multiple layers involved in a built-up roof, may include insulation and a protective surface on top. This technology was widely used in the past but is now considered outdated.
So, what is hot mopping?
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What is hot mopping or hot mop roofing?
Hot mopping, also known as hot asphalt roofing, is a popular method for waterproofing flat or low-slope roofs. A layer of hot asphalt and felt is applied to create a waterproofing membrane. When considering thermal cleaning of a roof, it is important to understand the costs associated with the process. This article looks at the warm roof cleaning process and provides an overview of the costs.
Understanding the Hot Mop Roofing Process
Hot mopping is a labor-intensive process that requires experienced professionals to ensure proper installation. Here are the general steps involved in hot mopping a roof:
Surface Preparation: The roof surface is thoroughly cleaned, removing any debris, dirt, or loose materials. Proper surface preparation is crucial for optimal adhesion of the hot asphalt.
Building application: The primer applied the roof surface to improve stickers on asphalt and produce a mixture of the roof and water.
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Coating Application: Hot asphalt is heated to a high temperature and poured onto the roof. It is spread evenly using specialized tools, creating a base layer. Next, layers of felt material, typically fiberglass or organic felts, are laid on top of the hot asphalt. The process is repeated, alternating between hot asphalt and felt layers, until the desired thickness is achieved.
Embedment: Once the layers are in place, the hot asphalt is carefully pressed into the felts using a mop or mechanical roller. This process, known as embedment, ensures proper adhesion and creates a seamless membrane.
Cooling and Curing: The hot asphalt needs time to cool and cure. This process allows the materials to bond together and form a durable and waterproof membrane. It is crucial to avoid foot traffic or any disturbances during this phase to prevent damage to the newly applied layers.
Inspection and Final Touches: After the hot asphalt has cooled and cured, a thorough inspection is conducted to ensure the roof has been properly waterproofed. Any necessary touch-ups or repairs are addressed to ensure a high-quality result.
Factors Affecting the Cost of Hot Mopping a Roof
The cost of hot mopping a roof can vary based on several factors. The important factors that influence the cost of whole project is as below:
The size of Roof: The most governing factor in determining the cost of roof is its size. The overall expense increases due to larger area of roof size, resultantly more labor and materials are required.
Roof Complexity: The complexity of the roof, including its shape, angles, and architectural features, can affect the cost. Roofs with intricate designs may require more time and effort to ensure proper application of the hot mopping layers.
Materials Used: The type and quality of materials used for hot mopping can impact the cost. Higher-quality materials often come at a higher price point but can offer increased durability and longevity.
Roof Accessibility: The accessibility of the roof plays a role in the cost.The enhancement in cost of roof increases, if there are incorporation of additional factors such as access to site or additional safety requirements.
The cost of Labor and Material: The cost of labor and materials can vary depending on the location. Depending upon location the cost of local labour and material may vary. The factors that influence the overall cost are the availability of skilled labour and local market conditions.
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Estimated Cost of Hot Mopping a Roof
The above mentioned factors will govern in determination of cost for cleaning a roof surface with hot water. The average price of 3$ to 7$, per square foot is available from the local market. Hence, it is recommended to take quotes from reputable firms before start of work based upon the location, size and material of your roof
It’s important to prioritize quality and hire experienced professionals for hot mopping your roof, as proper installation is crucial for long-term durability and performance. Investing in a well-installed hot mop roof can provide lasting protection against water infiltration and extend the lifespan of your roof.
Advantages and Disadvantages of Hot Mopping
Built-up roofs are multi-layered, providing a durable and traffic-resistant surface. When properly installed, they can perform well. However, there are some disadvantages to hot mop systems.
These roofs are prone to applicator errors, resulting in poor bonding between felts and asphalt if the temperature of the bitumen is not precise.
They are also susceptible to blistering, especially if moisture or dew is present during installation, leading to premature failure.
Exploring Better Roofing Alternatives
Considering the drawbacks associated with hot mop asphalt built-up roofing, it is recommended to explore other roofing systems that offer better alternatives.
Modern roofing technologies require less labor, have lower costs, and entail reduced maintenance expenses. These alternatives provide opportunities for individuals to obtain a higher-quality roof.
