The Second Step in The Re-Roofing Process – Hot Mop

Due to the ever-changing and harsh weather conditions of South Florida, your roof will require maintenance and may need to go through the re-roofing process at least once or twice during its lifespan. One of the most important parts of this process is the hot mop stage, which helps ensure that no leaks or roof damage occur. This step is commonly performed during a full roof replacement when a new roofing system is being installed.

Part of the process requires a material called modified bitumen. Bitumen can be used on either sloped or flat roof decks and is installed through the hot mop process, but what exactly does a hot mop involve?

Applying the hot mop is the second step in a general re-roofing process, acting as a secondary barrier between the dry-in materials and the roof tiles. It protects the base sheet and helps keep the roof watertight. To begin the hot mop process, a layer of hot asphalt is spread on top of the roof’s base sheet. The asphalt is applied evenly with a large heated mop over the entire surface. At the same time, a 90-lb felt or modified bitumen cap sheet is applied onto the hot asphalt.

Once these layers are embedded together, they are back-nailed to secure them to the roof and covered by the following ply, which is a type of protective membrane. This part of the process is critical to prevent leaks and future damage that could require major roof repair services if not installed correctly.

Materials Used During The Hot Mop Process

There are different materials that can be used depending on whether the roof is flat or sloped.

Flat Roofs

When re-roofing a flat roof, a mineral-surfaced cap sheet or a commercial-grade modified bitumen is often used. These materials are applied with hot asphalt or torch-applied using a flame torch to heat the bitumen as it is layered onto the roof.

Flat roofing systems require special installation methods, and in many cases this type of work is done during a full commercial roof replacement or major repair project to ensure the roof stays watertight.

Sloped Roofs

On sloped roofs, hot mopping is typically done using felt or granulated modified bitumen. If this method is not preferred, a peel-and-stick material may be used instead. This self-adhered membrane provides another waterproof layer before the tile installation begins.

Because the hot mop process is complex, professional installation is important to avoid problems that could later require costly commercial roof repairs or structural work.

Equipment And Safety During Hot Mopping

The hot mop process requires specialized equipment, including asphalt, modified bitumen or cap sheet material, a tar kettle, propane, mop buckets, ropes, and safety gear. Professional roofing contractors wear protective eyewear, gloves, and other safety equipment during installation.

Hot mopping produces strong fumes, so homeowners may be asked to leave the house during this stage of the project. While the fumes are not extremely toxic, they can be uncomfortable, especially for children, elderly residents, or anyone with breathing issues such as asthma.

Roofing crews also take precautions to protect the surrounding property. Tarps and plywood are placed over driveways, patios, and landscaping to prevent damage. After the job is complete, the work area is cleaned and inspected to make sure everything is safe and secure.

VIDEO NARRATION

The second step in the re-roofing process – the hot mop – is an essential part of a tile roof system. It protects your base sheet and keeps your roof watertight by acting like a secondary water barrier between the dry-in materials and the tiles.

On a sloped roof, hot mopping begins by embedding a 90Lb felt or modified bitumen cap sheet in hot asphalt. The material is back-nailed to secure it to the roof and covered by the following ply. On a flat roof, a mineral surfaced cap sheet or a commercial grade modified bitumen is used and can be torch applied or layered with hot asphalt.

The duration of the hot mop in progress depends on the size and pitch of the roof. And because the fumes are noxious and unpleasant, it is best for all occupants to leave their home for the day.

Although this is a messy job, every precaution is taken to protect your property by laying down plywood and tarps. Should the rare mess occur, the area will be pressure washed, immediately, with the appropriate cleaners.

Follow the next step in the roof installation process – Tile Install – to see how your new roof starts to take its final form. Visit our website for more information because at ABC Roofing have you covered.

Professional Re-Roofing Services In South Florida

The hot mop stage is one of the most important steps in the re-roofing process. When done correctly, it creates a strong waterproof barrier that protects your home or building for many years.

The roofers at ABC Roofing Corp have been servicing South Florida roofs for over 30 years. Licensed and state-certified, we specialize in complete roofing services including repairs, re-roofing, and full roof replacement for residential and commercial properties.

If your roof needs maintenance, repairs, or a full replacement, contact ABC Roofing today to schedule an inspection.