Built Up Roofing

Built-Up Roofing Systems

Built-up roofing systems are time-tested against water intrusion and well known for its self-healing properties.

Built Up Roofing (BUR) is one of the oldest and most reliable commercial roofing systems for low-slope or “flat” roof structures. Commonly referred to as “tar and gravel” roofs, BUR consists of layers or plies of roofing felts, between which asphalt or bitumen is applied. Its multiple layers provide added protection and perform well in punishing weather conditions. Built-up roofs are especially resistant to damage from wind, hail and extreme sun.


Hot Mop Asphalt Coating

Hot-mop asphalt roofing is a type of roofing system that has been implemented for several decades internationally due to its great usefulness. Its system consists of several layers of hot asphalt and felt installed on the roof to create a solid and durable surface.
This article will look in-depth at hot-mop asphalt roofing systems, from their definition to their history of modified bitumen and built-up roofing systems. In addition, we will discuss some of the benefits that asphalt/hot-mop roofing systems confer, the types of properties that benefit from them, the typical length of the warranty, and the average price for commercial buildings.
First, we will define asphalt hot-mop roofing systems and detail how they work. In addition, we will discuss the history and context of hot-mop roofing as it relates to modified bitumen roofing systems and built-up roofing. Then, we will mention the main benefits of hot mop asphalt roofing florida, including their longevity, strength, and low maintenance.
We will also explore the different types of properties that benefit from asphalt/hot-mop roofing systems, such as healthcare buildings, condominiums, schools, and large flat roofs. Finally, we will discuss the typical warranty length of these systems and the average price for commercial buildings.

What is hot mop in roofing?

Hot mop asphalt roofing is a type of roofing system that requires the application of layers and a hot mop. In this process, a tough and durable surface can withstand various elements and even daily wear and tear because they are characterized by high durability and exceptional strength.

These systems provide significant advantages over other types of roofing, including the ability to adapt to various roof shapes, weather resistance, and durability. In addition, these types of systems are less prone to cracking and leaking than other roofing systems.

On the other hand, bitumen is another type of roofing system that is commonly used and is composed of layers of polymer-modified asphalt, and built-up roofing, also known as tar and hop mop roofing with gravel, is another type of roofing system consisting of several layers of tar and gravel.

Unlike these other types of roofing, hot-mop systems are popular due to their durability, strength, and ability to adapt to different roof shapes. However, they can require a higher cost than other roofing systems and a more complex installation process.

Currently, the major manufacturers of hot mop asphalt roofing are GAF, CertainTeed, and Owens Corning, and the average price for this service varies depending on the size of the building and the complexity of the installation process and generally ranges from $3 to $7 per square foot.

The hot mop process

The installation process is a roofing method that requires the application of layers of hot asphalt and felt to build a robust and durable surface. Below, we will detail each of the steps involved in a successful installation:

  • Step 1 – Preparation: before starting the hot mopping process, one must verify that the roof surface is immaculate and debris-free. In addition, repair any damage or cracks in the roof surface before proceeding with the installation.
  • Step 2 – Asphalt Application: The hot asphalt is applied to the roof surface in layers using a mop or roller. Each layer should be applied evenly and appropriately to ensure a solid and durable surface.
  • Step 3 – Laying the felt: The felt is placed on the hot asphalt and firmly pressed into the selected space to ensure proper adhesion.
  • Step 4 – Repeat the process: The application of layers of asphalt and felt should be repeated until the desired number of layers has been created. Each layer should be uniform and of adequate thickness to ensure a solid and durable surface.
  • Step 5 – Finishing: After all required coats have been applied, a final hot asphalt coat should seal the surface. Additional finishes, such as hop mop roofing with gravel or tiles, can be used depending on the desired result.

Regarding the materials and tools used for the hot-mop roofing process, hot asphalt, felt, a mop or roller, a torch, cutting tools, and adhesives are required. In addition, safety measures, such as protective clothing, personal protective equipment (PPE), and adequate ventilation, must be implemented.

In addition, there are safety considerations and practices that should be considered for hot mop asphalt roofing, including fire-resistant protective clothing, proper PPE, adequate ventilation, and formal training for personnel involved in the roofing process. It is also necessary to have appropriate planning and constant monitoring of the process to ensure the safety of the workers and the quality of the work performed.

How many layers does a hot mop roof have?

A hot mop roof comprises several layers, usually varying between 2 and 4 depending on building type, climate, and roof conditions. Below, we share an overview of the layer system applied in this roofing process.

  • Base coat: this is the first layer of asphalt applied on the roof. The function of this layer is to provide a solid base for the rest of the coating system and to help seal the roof against water ingress.
  • Intermediate layer: consists of one or two layers of asphalt and felt and is applied over the base layer. The function of this layer is to help increase the strength and durability of the roof and provide a more uniform surface for the top layer.
  • Top coat: consists of one or two layers of asphalt and felt and is applied over the middle layer. The function of this layer is to protect the roof surface from water, sun, and other elements.
  • Finish: this is the last layer of the system and is composed of a layer of asphalt or protective coating. The function of this layer is to help seal the roof and provide a more resistant and durable surface.

Regarding the future of asphalt roofing systems, it is expected that innovations in material technology and sustainability will drive the development of suitable roofing systems with high strength and durability. In addition, such systems will likely be increasingly integrated with solar energy, allowing renewable energy to be generated and reducing costs for building owners.

Maintenance and repair of hot mop roofs

Proper maintenance and repair are essential to ensure the durability and performance of a hot mop roof, so it is crucial to follow specific tips to keep it in good condition. Here are some of them:

  • Regular inspection: roof inspections are indispensable to detect any damage or wear and tear in time, especially after extreme weather events.
  • Cleaning: keep the roof completely clean and debris-free to prevent water buildup, mold, and mildew.
  • Leak repair: fix any leaks or damage as soon as you detect them to avoid worsening the problem and causing further damage.
  • Professional maintenance: hire a professional to perform regular hot mop roof maintenance and repairs.

However, during these types of maintenance and repair processes, some hot mop roofing problems can occur, such as cracking and blistering of the roof surface, wear and aging of the roof surface, water and moisture damage, damage from UV exposure, and even problems with sealing joints and connections.

Usually, these types of problems are caused because, during these processes, the professionals do not follow the manufacturer’s instructions, do not use the proper personal protective equipment, do not follow safety protocols, or do not perform regular inspections.

To avoid these circumstances, an excellent option is to apply hot mop roof repair strategies that include patching damaged areas, replacing damaged areas of the roof, and using additional layers of asphalt and felt to increase the roof’s strength and durability exponentially.

In addition, to ensure a longer life of the hot mop systems, it is necessary to perform regular inspections during maintenance, keep the roof clean and free of debris, and perform professional repairs and maintenance when required. Following the manufacturer’s instructions and avoiding common mistakes during installation and maintenance is essential to ensure excellent results.


Hot mop asphalt roofing florida are popular for commercial and residential roofing construction due to their strength and durability. The hot mop installation process requires the application of layers of asphalt and felt to create a solid surface. But, performing proper maintenance and repair with a trusted company like Advanced Roofing.

Regarding the advantages and disadvantages of hot mop roofing versus TPO and BUR, hot mop roofing systems are more recommended due to their strength and durability. However, they can be more expensive than other roofing systems. On the other hand, TPO and BUR roofing systems are popular choices because of their strength, durability, and lower cost.

Pro tip: If you are interested in learning more about hot mop roofing, there are many resources available online, such as installation and maintenance guides, instructional videos, and online discussion forums that you can access. You can also look for online or in-person training courses to learn more about installing and maintaining warm mop ceilings.

Benefits of Built-Up

  • Qualify for coatings
  • Self-healing
  • Proven track-record
  • Superior waterproofing capabilities
  • Rated for high-wind speeds
  • Up to 30-year warranty available

Customer Testimonial

Best Commercial roof coating lee county company” The workers did a great job on Commercial Roof Coating in Lee County, which is why I later hired them for several jobs at my businesses. I will definitely consider Advanced Roofing for any re-roofing or new project I have in mind!

The Advanced Roofing workers carefully dismantled the entire roof without affecting any delicate areas of my yard. Without a doubt, the installation of the roof was exact and attractive. They also made sure to clean everything up very well before they left. We highly recommend this Commercial roofing contractor Lee County.

This company is incredible! I hired them to work after a windstorm, and the result was perfect. Advanced Roofing offered me excellent prices to complete all the repairs I needed, plus they cleaned up thoroughly without leaving small pieces of the product in the yard. Because of that good experience, I hired them a second time to install a new roof at another location, and I was very grateful!

The team at Advanced Roofing performed a Commercial Roof Coating in Fort Myres of my clothing business, and I was delighted. They exceeded my expectations; the roof was renovated with nice style and quality. All the workers were amiable and covered all my requests, so I was delighted with the job.

Just completed a very successful project with Advanced Roofing up in Fort Pierce Florida doing a Roof Recoat, their attention to detail and safety was outstanding. Not only was everyone I dealt with professional and courteous, they also got the job done without any complaints from the tenant. It is hard to get such a good roofing service these days. I highly recommend this company for any roofing needs that you need. A big thanks to Advanced Roofing Team!

Advanced Roofing is one of the best roofing companies in South Florida. They make every service call or project easy and always have amazing communication. We’ve used them to install new roofs and maintain our existing roofs. Their crews are friendly and always provide us with pictures and detailed notes after every site visit. As a Property Manager they take a lot of the worry away from me and respond promptly to all my leaks. Don’t think twice call Advanced Roofing!

Ryan came to do a roof inspection for potential repair and replacement for our Church. He was absolutely awesome. He knows everything there is to know about roofs, and he explained to me thoroughly what my options are. He was honest, patient, and empathetic. He sent me the inspection report with details of the roof situation and options for actions we need to take with pricing. There are so many good things to say about Ryan. We will definitely use him and his company to do our roof works. Thanks, Ryan, for coming out on such a cold day.

Working with Advanced Roofing under the City of Sunrise – Term Contract, the City of Coral Springs chose to piggyback off this contract to establish a Roof Asset Management Program. We are confident that through Advanced Roofing’s Roof Asset Management Portal, Advanced Access, we will be able to gather and manage roofing data more efficiently and more cost-effectively.

During the recent Hurricane Irma storms, the roof caps on the stairwells at Island Crowne Condominium were destroyed. Your roofer Anthony undertook the task of replacing them. His dedication to the job is to be commended as well as the fine quality of work. It was a pleasure having Advanced Roofing at Island Crowne.

I am pleased to let you know that Advanced Roofing exceeded our expectations. Sea Ranch Club joins the long list of satisfied customers and congratulates you and the entire organization for earning and deserving the reputation of the best in the businesses.


GAF Roofing Manual

Want the secret to a leak free roof for 25 Years? Download the GAF Roofing Solutions reference manual.

Common Roof Issues

Learn about 5 common roof problems you can prevent with annual maintenance and repairs.

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Dare to Compare

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