Tiffany Haney
Installing a pan liner on an outside corner base is a challenging task that requires advanced knowledge of construction and plumbing. It involves waterproofing the shower base to prevent water damage to the floorboards underneath. The process includes measuring and cutting the pan liner, applying adhesives, and securing the liner in place, ensuring that it extends up the walls. The outer corners along the shower curb require special attention, with installers needing to cut the liner and fit preformed corner covers to seal the edges. Following the correct steps and allowing adequate time for each stage of the installation are crucial for a successful outcome.
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What You'll Learn
Cutting the liner
First, identify the location of the drain hole on the drain base. Cut the pan liner to match the dimensions of the drain hole, ensuring it will fit snugly around the drain. This step is crucial to ensure proper water flow and drainage.
Next, address the outer corners of the shower curb. The outer corners typically require cutting the liner to fit neatly. Using a sharp utility knife, carefully cut the liner along the base of the corner, then run the knife up the wall of the shower curb to create a clean slit. This will allow the liner to wrap around the curb seamlessly.
When working with PVC liners, it is essential to use a PVC bonding adhesive. Apply a thin layer of adhesive to the back of the liner, following the manufacturer's instructions. This will ensure that the liner adheres securely to the surface and prevent leaks.
For a neat finish, especially around outside corners, consider using dam corners to cover the cut areas. Dam corners provide a seamless look and enhance the waterproofing of your installation. Use X-15 adhesive for PVC liner installations or Oateyweld for CPE liner installations to bond the dam corners effectively.
Finally, always remember to wear protective gear, such as gloves and eye protection, when cutting the liner to prevent any accidental injuries. Take your time and measure twice, cut once to ensure accuracy and a watertight installation.
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Applying adhesive
Before applying any adhesive, ensure that you are using an adhesive that is compatible with your pan liner material. For PVC liners, use PVC liner adhesive or Oatey X-15, and for CPE liners, use Oateyweld.
First, open the tube of the appropriate adhesive. Using a paintbrush, spread a thin, even layer of adhesive, approximately 1/8-inch thick, over the back of each dam. Make sure to follow the instructions on your chosen adhesive's packaging for the best results.
Next, carefully position the dam at the top of the shower curb, aligning it with the outside corner. Ensure the center fold of the dam matches up with the ridge on the corner for a precise fit. Smooth the dam down into the shower using your hands, ensuring good contact with the shower surface.
After the dam is securely in place, focus on the top portion. Smooth the liner over the curb, firmly securing the bonding adhesive. Repeat this process for the other outside corner of the shower pan, ensuring both corners are well-adhered.
Additionally, you can apply adhesive to the folded corners of the liner before stapling it to the wall framing. This will help create a watertight seal and ensure maximum waterproof protection.
Remember to let the adhesive cure overnight before testing the waterproof status of your installation.
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Attaching corner covers
First, identify the outer corners along the shower curb, as these will require cutting. The liner should be cut to fit snugly around the curb, with a recommended height of about 6 inches. This step is crucial to ensure that the liner wraps around the curb seamlessly.
Next, apply an adhesive to the back of the dam corner. You can use PVC bonding adhesive or CPE adhesive, depending on the material of your liner. Spread a thin layer, approximately 1/8 inch, over the back of the dam. This step will help create a strong bond between the dam corner and the liner.
Now, carefully position the dam at the top of the shower curb, aligning the centre fold with the ridge on the corner. Smooth the dam down into the shower using your hands, ensuring a secure fit. Repeat this process for the other outside corner of the shower pan.
Finally, you can attach the preformed corner covers to seal the edges against water. Ensure that the liner is firmly pressed into the corners and use a utility knife to create a slit at the base of the corner, running it up the wall of the shower curb. This will help create a tight fit for the corner cover.
By following these steps, you will effectively attach the corner covers, providing a waterproof seal for your shower pan liner installation.
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Securing the liner
First, it's important to understand the role of the liner. The shower pan liner is a thin, flexible membrane that sits under the shower pan, acting as a waterproof barrier to protect the base of the shower and the floorboards underneath from water damage. This is why proper installation and securing of the liner are essential.
For outside corners, you will typically need to cut the pan liner to fit neatly. After cutting, the next step is to use a dam corner to cover and seal the cut area. Dam corners provide a smooth finish and ensure the edges are protected from water seepage. Apply a suitable adhesive to the back of the dam corner, ensuring it's compatible with the liner material—either PVC bonding adhesive or CPE adhesive. Spread the adhesive evenly, following the manufacturer's instructions. Position the dam corner at the top of the shower curb, aligning it with the outside corner. Smooth the dam corner into place, using your hands to ensure a secure fit. Repeat this process for any additional outside corners.
The liner itself can be secured in several ways. One method is to use an adhesive under the liner to bond it to the floor and curb. Another option is to use staples or nails to secure the liner to the wall framing. Fold the corners of the liner neatly and staple or nail them in place. It is recommended to staple or nail only the top portion of the liner for maximum waterproof protection. Additionally, you can apply a pan liner adhesive to the excess liner in the folded corners before stapling or nailing it to the wall framing.
Finally, for added security, you can use corner clips or roofing nails with large heads to further secure the liner in place. It is important to note that the use of staples or screws is unnecessary when using dam corners, as they provide a secure bond. Once the liner is secured, it is essential to test the shower pan for water tightness by filling it with water and letting it sit for several hours or overnight.
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Waterproofing the liner
To begin waterproofing the liner, cut the liner vertically at the inside corner and adhere it horizontally over the top of the scrap liner. Use an adhesive, such as Oatey X-15 for PVC liners or Oateyweld for CPE liners, to attach the liner to the wall framing. It is recommended to only staple or screw the top half-inch of the liner for maximum waterproof protection.
After adhering and stapling the liner, cut two pieces of scrap liner to match the width of the curb with a height of around 6 inches. Adhere these pieces on either side of the curb, ensuring half is on the curb and the other half is on the wall framing. This will provide extra protection and ensure a watertight seal.
Once the adhesives have cured overnight, conduct a test to check for any leaks. Pour water into the shower bed at a height equal to that of the curb and let it sit for at least two hours. If there are no leaks, the water level will remain unchanged, the surrounding area will be dry, and there will be no water leaking from the ceiling (if on an upper floor).
After confirming that the shower bed is watertight, you can move on to the next steps of your shower installation, such as choosing your drain and applying a mortar base on top of the pan liner.
It is important to follow the manufacturer's instructions and recommendations for your specific liner and shower setup to ensure proper waterproofing.
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Frequently asked questions
A shower pan liner is a waterproof mat that you install under shower tiles to keep water from damaging the floorboards underneath the shower.
First, cut the liner to size, then fold and secure the interior corners. Next, cut the outer corners and fit preformed corner covers over them to seal the edges against water. Finally, adhere the excess liner to the mortar bed and staple it to the curb.
You will need a pan liner, duct tape, silicone caulk, a clamping ring, bolts, a utility knife, and an adhesive such as PVC bonding adhesive or CPE adhesive.
You can use PVC bonding adhesive or CPE adhesive, depending on the material of the liner. You can also use Oatey X-15 for PVC liners or Oateyweld for CPE liners.
