Ella Walter
When remodelling a shower, one of the key considerations is how to ensure the shower pan liner is waterproof. Two products that are often considered for this purpose are Oatey shower pan liners and RedGard. Oatey offers a highly reliable waterproofing system with its PVC liner, while RedGard is a liquid membrane that can be applied to the mortar bed and walls to provide an additional waterproofing layer. Some people choose to use both products together for extra protection, but this may be unnecessary and could even cause issues if not done correctly. For example, if the drain weep holes are clogged or sealed by RedGard, water could accumulate and cause problems. Ultimately, both products can be effective if used correctly, and the decision of whether to use RedGard, an Oatey liner, or both will depend on the specific project requirements and the user's preference for their shower pan.
| Characteristics | Values |
|---|---|
| RedGard approved as a shower pan liner | Yes |
| RedGard application on the final mortar bed | Not recommended |
| Oatey PVC liner | A highly reliable waterproofing system |
| RedGard application on walls and transitions | Recommended |
| RedGard application on the mortar bed | Depends on whether added protection is desired |
| RedGard application on the drain weep holes | Not recommended |
| RedGard application on the Oatey liner | Not recommended to avoid a "moisture sandwich" |
| RedGard application on the floor | Not recommended before tiling |
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What You'll Learn
RedGard is approved as a shower pan liner
When using RedGard, it is crucial to ensure that the drain area and weep holes are properly protected. One technique is to use a small gravel layer or purpose-made weep hole protectors to prevent clogging. Additionally, RedGard can be combined with a fabric liner or fibre cloth to add strength and thickness, enhancing the overall durability of the shower pan liner system.
Some users have shared their experiences with using RedGard. One user mentioned that they coated a concrete slope with RedGard and installed a typical pan liner. However, they experienced issues with bonding, as the RedGard pulled off easily from the concrete. Another user shared a technique where they cut out a swatch of fiberglass cloth and laid it atop the base flange, saturating it with RedGard during application.
While RedGard is approved for use as a shower pan liner, it is important to carefully follow the instructions and take the necessary precautions to ensure its effectiveness. Proper preparation of the surface and protection of the drain area are crucial for successful results. It is always recommended to refer to the manufacturer's instructions and seek professional advice when in doubt.
Overall, RedGard can be a viable option for waterproofing a shower pan liner, but it should be used in conjunction with other materials and techniques to ensure a durable and leak-proof installation.
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RedGard can be used without a PVC liner
RedGard is a waterproofing agent that can be used as a shower pan liner. It is a plastic coating that can be applied directly to the floor, and then a mud floor can be floated over the top. It is approved for use as a bed liner in a shower.
If you are creating a solid shower pan that is not meant to percolate water through it, you should use a Kerdi drain and waterproof the base with fabric water proofer to ensure that no water gets through. In this scenario, you do not use PVC liners.
If you are using a PVC liner, the top layer of mud should be extremely porous to allow water to percolate to the PVC liner and make its way to the weep holes. Waterproofing on top of this with RedGard negates this effect. However, if the PVC liner is done properly, you do not need RedGard on top, although some people choose to use it for extra protection.
If you are using RedGard without a PVC liner, you can use a technique where you cut out a swatch of real fiberglass cloth and lay it atop the entire base flange, overlapping onto the pre-slope area. You then saturate it with RedGard during your normal application. Once it is dry, you bolt on the top drain flange and cut out the centre of the cloth swatch to unblock the normal drain passage.
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RedGard as an additional waterproofing layer
RedGard is a waterproofing agent that can be used as an additional layer of protection in shower pans. It is a roll-on or liquid membrane that can be applied to the mortar bed and walls, providing a water-tight seal.
While some professionals prefer to rely solely on a PVC liner, which, when installed correctly, is a highly reliable waterproofing system, others opt for the added protection of RedGard. This is especially common in areas where additional waterproofing is desired for peace of mind.
If you choose to use RedGard as an additional waterproofing layer, it is important to take certain considerations into account. Firstly, ensure that the drain area and weep holes are properly protected. Weep holes allow water that penetrates the mortar to drain out, and if they are clogged or sealed by the RedGard, water can accumulate and cause problems. To prevent this, use a small gravel layer or purpose-made weep hole protectors. Secondly, be aware that applying RedGard on top of a PVC liner can create what is known as a "moisture sandwich". This refers to the potential for water to become trapped between the two waterproofing layers, which could lead to issues over time.
RedGard can also be used in conjunction with a technique that involves saturating a swatch of fiberglass cloth with RedGard and laying it atop the base flange, overlapping onto the pre-slope area. This adds strength and thickness, improving the clinching of the top flange.
Overall, RedGard can be an effective additional waterproofing layer when used correctly, providing extra protection against leaks, water infiltration, and the growth of mold and mildew.
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RedGard as a backup layer to PVC liner
RedGard is a waterproofing barrier that can be used to protect against leaks and water infiltration. It is approved for use as a shower pan liner and can be applied to the mortar bed and walls. However, it is important to note that RedGard should not be applied to the final mortar bed if a PVC liner is already installed as it can create a "moisture sandwich", trapping water between the PVC liner and the RedGard. This can lead to potential issues over time.
That being said, some people choose to use RedGard as a backup layer to their PVC liner for added insurance. If the PVC liner or seams were not installed perfectly, RedGard can provide an extra layer of protection against leaks. It is important to ensure that the drain area and weep holes are properly protected if using RedGard in this manner, as it can make it difficult to achieve a proper bond. One way to do this is by using a small gravel layer or purpose-made weep hole protectors to prevent clogging.
When using RedGard, it is recommended to follow the instructions provided by the manufacturer. In one case, a user coated a concrete slope with RedGard 35 days after the concrete was installed, which resulted in the product pulling and peeling off. The instructions recommend waiting 28 days before applying RedGard to concrete.
RedGard can also be used in conjunction with a technique that involves cutting out a swatch of fiberglass cloth and laying it atop the base flange, saturating it with RedGard during your normal application. This adds strength and thickness to the RedGard layer, improving its effectiveness as a liner.
Overall, while RedGard can be used as a backup layer to a PVC liner, it is important to carefully consider the potential issues that may arise, such as the "moisture sandwich" effect and difficulty achieving a proper bond at the drain weep holes.
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RedGard application techniques
RedGard is approved for use as a shower pan liner and can be used without a PVC liner. However, it is important to follow proper application techniques to ensure effective waterproofing. Here are some detailed techniques for applying RedGard:
Surface Preparation
Before applying RedGard, it is crucial to ensure that the surface is properly prepared. The surface should be clean and free of any contamination. If the surface is porous, such as concrete, it is essential to apply a primer. Priming acts as a glue that enhances the adhesion of RedGard to the surface, preventing poor bonding and ensuring long-term durability.
Tools and Application Techniques
Equipping yourself with the right tools is fundamental to a successful and uniform application. For large areas, use paint rollers, and for edges or smaller areas, use brushes. Apply RedGard in even, overlapping strokes to achieve consistent coverage without weak spots.
Thickness and Curing
Accurate thickness measurement is critical when applying RedGard. Utilize a wet film thickness gauge to ensure the application meets the required standards and provides adequate protection. After application, allow the RedGard to cure properly under optimal conditions. Sufficient curing time solidifies the membrane's protective barrier, ensuring its functionality and waterproofing capabilities.
Use of Fiberglass Cloth
To strengthen the RedGard application, consider using embedded fiberglass cloth. This is particularly beneficial where the RedGard bridges from the pre-slope to the flange face, adding thickness and strength. The cloth can help prevent crushing or separation of the thin RedGard membrane, making it a trustworthy custom liner for your shower basin.
Combination with Other Systems
Some contractors opt to combine RedGard with other shower systems, such as PVC liners. However, it is important to note that combining systems may not provide additional benefits and could potentially cause issues. If you choose to use both systems, ensure that the PVC liner is installed correctly, and the top layer of mud is extremely porous to allow for proper water drainage.
By following these techniques and paying attention to details, you can achieve a successful RedGard application, ensuring your shower pan is effectively waterproofed.
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Frequently asked questions
Yes, RedGard is approved as a shower pan liner and can be used on an Oatey shower pan liner. However, it is recommended that you focus on waterproofing the walls and transitions where water is more likely to penetrate over time.
RedGard provides an additional waterproofing barrier, serving as a backup layer if the PVC liner or seams were not perfectly installed. It also helps to prevent mould and mildew by reducing water absorption into the mortar bed.
Applying RedGard on top of a PVC liner can create a "'moisture sandwich'", where water gets trapped between the two layers. This can lead to potential issues over time. Additionally, RedGard can make it difficult to achieve a proper bond at the drain weep holes.
