Hot Mop Or Cold: Pvc Pan Liners

There are differing opinions on whether PVC pan liners need to be hot mopped. Some people believe that hot mopping is a better method for waterproofing a shower than using a PVC liner, as it is more reliable and lasts longer. However, others argue that PVC liners are easier to work with, last longer, and are less messy. Ultimately, both methods can be effective if done properly.

Hot mopping vs PVC pan liners for waterproofing

Hot mopping and PVC pan liners are two methods used for waterproofing showers. Homeowners often face the challenge of choosing between these two options when remodelling their bathrooms. This article will outline the pros and cons of each method to help you make an informed decision.

Hot Mopping

Hot mopping is a traditional method that involves using hot tar and felt paper to create a waterproof barrier. It is a popular choice in regions like Southern California and Arizona and is known for its durability. When applied correctly, hot mopping can create a shower pan that will last for decades. It is essential to hire experienced professionals who will apply multiple layers of tar and felt paper to ensure maximum effectiveness.

However, one of the drawbacks of hot mopping is that it can be prone to cracking and leaking over time due to ageing and thickness. Additionally, finding experienced contractors who still offer this service can be challenging, as many have switched to using PVC liners or other modern waterproofing methods.

PVC Pan Liners

PVC pan liners, also known as vinyl liners, are a newer alternative to hot mopping. They are made of thick, durable material similar to swimming pool liners. The liner is moulded to the shape of the shower floor, and concrete is placed on top before the tile installation. PVC pan liners are highly effective in preventing leaks and are often recommended by contractors due to their longevity.

While PVC pan liners are generally more expensive than hot mopping, they offer a more reliable and long-lasting solution. In addition, PVC pan liners do not have the same issues with cracking and drying out that hot mopping does, making them a lower-maintenance option.

Both hot mopping and PVC pan liners can be effective methods for waterproofing a shower. However, PVC pan liners have emerged as a preferred choice due to their durability, ease of installation, and lower failure rate. While hot mopping was a common practice in the past, modern alternatives like PVC pan liners offer improved performance and peace of mind for homeowners concerned about leaks and waterproofing. Ultimately, the decision between hot mopping and PVC pan liners depends on factors such as budget, availability of contractors, and personal preference.

Pros and cons of hot mopping

Pros of Hot Mopping

Hot mopping is a waterproofing method that involves applying multiple layers of felt and hot asphalt to create a waterproof seal. It is commonly used to waterproof bathrooms, especially underneath showers, but it can also be used for decks, roofs, and other home projects. Here are some advantages of hot mopping:

• It is a reliable waterproofing method that effectively prevents water damage to your home.
• It provides multiple layers of protection against water leaks, lowering the humidity levels in your bathroom.
• It fills in the pores and escapes of tile and grout, preventing tile breakage and poor waterproofing.
• It is made from high-quality liquid heated tar and three-layered roofing-grade felt, ensuring long-lasting protection.
• It creates a fully sealed and waterproof barrier, preventing leakage in the shower pan and water outflow in tile pores.

Cons of Hot Mopping

While hot mopping offers excellent waterproofing capabilities, there are also some disadvantages to consider:

• It is a messy, strenuous, and dangerous project that requires hiring an experienced professional.
• The hot asphalt can reach temperatures of up to 400 degrees Fahrenheit, posing a risk of serious burns.
• It has a strong, unpleasant smell that can linger for a few days and cause headaches.
• It takes longer to set up compared to liner alternatives.
• It is prone to cracking and drying over time, which can lead to leaks.

Pros and cons of PVC pan liners

PVC pan liners are a popular choice for shower installations due to their flexibility, ease of installation, and affordability. However, there are some considerations to make when deciding whether to use PVC pan liners or opt for alternative materials. Here are the pros and cons of PVC pan liners:

Pros of PVC Pan Liners:

• Flexibility and Ease of Handling: PVC liners are known for their flexibility, allowing them to conform to various shower contours. This makes them a good option for showers with unique shapes or designs. They are also relatively easy to handle and install, which can help reduce labour costs.
• Resistance to UV Radiation and Chemicals: PVC liners are designed to resist UV radiation, which helps maintain their integrity over time, even when exposed to sunlight. They are also resistant to chemicals, making them suitable for use with various cleaning agents and products.
• Suitable for Different Shower Sizes: PVC liners are available in various thicknesses and sizes, making them adaptable to different shower dimensions. This versatility ensures they can be used in a wide range of applications.
• Affordability: PVC liners are often more affordable than other options, such as CPE or EPDM liners. They offer a cost-effective solution without compromising on functionality, making them a popular choice for those on a budget.

Cons of PVC Pan Liners:

• Prone to Punctures and Tears: One of the main drawbacks of PVC liners is their susceptibility to punctures and tears. This makes them more delicate to work with during installation, as they require careful handling to prevent damage.
• Not as Long-Lasting: While PVC liners offer good performance, they may not have the same longevity as some other materials. Over time, they can degrade and become more prone to leaks, especially if they have been damaged during installation or use.
• Installation Care: To ensure optimal performance, PVC liners require careful installation, especially when it comes to seaming and sealing. Improper installation can lead to leaks and mould buildup, so it is crucial to follow the manufacturer's instructions and engage experienced professionals.

In conclusion, PVC pan liners offer flexibility, ease of installation, and affordability. However, they may not be as durable as other options and require careful handling during installation. Ultimately, the choice between PVC and alternative materials depends on specific project requirements, budget, and personal preferences.

Installation processes for hot mopping vs PVC pan liners

Hot mopping is a waterproofing method that involves applying multiple layers of felt and hot asphalt to create a waterproof seal. The process is commonly used to waterproof bathrooms, specifically underneath showers, but it can also be used for decks, roofs, and other home projects. It is a messy, strenuous, and dangerous project that requires experience and can be prone to error. The hot asphalt can reach temperatures of 400 degrees Fahrenheit, creating a risk of burns.

The first step in hot mopping is to create a slope of 1/4 inch per foot towards the drain. This is done by trowelling in a dry-pack mortar bed, which is then wetted to allow the mortar to cure. The hot mopping process then involves applying three layers of 15# felt paper, with hot tar before, between, and after each layer. After the three layers of felt are in place, a final coat of hot tar, called the "flood coat", is mopped over the entire surface, being careful to avoid the weep-holes of the drain. The weep-holes are small holes that allow any water that reaches the hot mop to escape into the drain line.

PVC pan liners, also known as shower pan liners, are waterproof mats installed under shower tiles to prevent water from damaging the floorboards underneath. The installation process for PVC pan liners is quite involved and may be challenging for beginner DIY enthusiasts. It is recommended for those with advanced knowledge in construction and plumbing. The following is a general overview of the installation process:

• Cut a 4.5-inch diameter hole in the centre of the shower floor where the tile shower drain would normally be positioned.
• Disassemble the tile shower drain and lay the drain base in the opening, ensuring the flange of the drain base rests on the subfloor.
• Solvent-weld the drain base to the drainpipe using the appropriate solvent cement.
• Cover the drain base opening with duct tape to prevent debris from entering the drain.
• Apply a sloped mortar bed over the subfloor, sloping at 1/4 inch per foot from the wall framing to the top of the drain base. The sloped mortar bed should be flush with the top surface of the drain base.
• After the sloped mortar bed has cured, determine the pan liner dimensions. The liner should be large enough to completely cover the floor, turn up all sidewalls at least 2 inches above the finished curb height, and adequately cover the curb.
• Lay the pan liner on a clean floor surface, measure, and cut to the appropriate dimensions. Seaming may be required for larger showers.
• Apply a bead of silicone caulk around the upper surface of the drain base and screw in the clamping ring bolts. Lay the pre-measured pan liner over the drain body, ensuring a seal between the drain base and the pan liner.
• Work the pan material from the drain body to the sidewall framing and curb threshold, ensuring it lays flat on the floor surface. Adhesive may be used to bond the pan liner to the floor and curb, ensuring the adhesive is compatible with the pan liner.
• For outside corners or curbs, cut the pan liner as needed and use a dam corner to cover the cut area. Bond the dam corners using the appropriate adhesive for PVC or CPE liner installations.
• Cut out the pan liner material over the drain hole to match the dimension of the drain hole on the drain base. Place the clamping ring over the bolts and tighten them snugly, ensuring the weep holes are clear of any residual pan liner material or silicone.
• Water-test the installation by filling the shower floor with water and letting it sit for four hours. Observe for leaks and repair if necessary. Repeat until the installation is leak-free.
• Apply a reinforcement bed of mortar over the membrane.

While hot mopping is a more labour-intensive and messy process, it creates a reliable waterproof seal that can last up to 15 years. PVC pan liners are easier to install and can last for decades, but they may not provide the same level of waterproofing protection as hot mopping.

Cost and time comparison of hot mopping vs PVC pan liners

When it comes to remodelling a bathroom, there are a few options to consider for shower floors: hot mopping and PVC pan liners are two popular choices. But which one is more cost-effective and time-efficient?

First, let's talk about cost. Hot mopping involves using hot tar to seal the shower floor, and it can be a messy and labour-intensive job. The cost of hot mopping can vary depending on the size of the shower, but it typically ranges from $150 to $300 for the materials and labour. On the other hand, PVC pan liners are made of vinyl and are easier to install, but the materials can be more expensive. The average shower will cost a couple of hundred dollars for the PVC liner, and you may also need to factor in the cost of hiring a contractor to install it.

In terms of time, hot mopping can be a quicker process, especially for small showers. An average-sized shower can be hot mopped in about 30 minutes. PVC pan liners may take longer to install, as the liner needs to be moulded to the floor and concrete needs to be placed on top before tiling can begin. This process can take several hours, depending on the size and complexity of the shower.

While hot mopping may be more cost-effective for smaller showers, PVC pan liners could be a better investment in the long run. PVC pan liners are known to last longer, with some people claiming they can last a lifetime. Hot mopping, on the other hand, may need to be redone every 15 to 30 years due to cracking and leaking.

Ultimately, the decision between hot mopping and PVC pan liners depends on your budget, the size and complexity of your shower, and how long you want the waterproofing to last. Both options have their pros and cons, but with proper installation, either method can result in a waterproof shower that will last for years.

It is always recommended to consult with a professional contractor or plumber to get their expert opinion on which option is best for your specific situation. They will be able to assess your unique needs and provide guidance on the most cost-effective and time-efficient solution for your bathroom remodelling project.

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