
Oatey's shower pan liner kits are designed to be cut to fit your shower dimensions. The liner can be cut using a utility knife or heavy-duty scissors, with care taken to avoid punctures. It is recommended to cut outside corners and curbs, and to use dam corners to waterproof these areas. Incorrectly cutting the liner can lead to shower failure, so it is important to carefully follow the manufacturer's instructions when installing an Oatey shower pan liner.
| Characteristics | Values |
|---|---|
| Installation | Cut the Oatey shower pan liner according to the required dimensions. |
| Use a utility knife or heavy-duty scissors to cut the liner. | |
| Staple the liner to the wall framing and cut away any excess that hangs outside the shower dimensions. | |
| Oatey's Perfect Slope can be installed to save time and hassle, trimming it to the shower dimensions. | |
| Oatey pan liners are marked in 6-inch increments for easy measuring. | |
| Cut the liner at outside corners and curbs and use dam corners to waterproof these areas. | |
| Do not cut the liner at the inside corners of the shower. | |
| Fold and crease the liner at inside corners to form a watertight corner. | |
| Oatey's shower pan liner kits come with one liner and two corner dams for right or left corner installations. | |
| Oatey's shower pan liners are offered with either CPE or PVC sheet material at 30 or 40 mil thickness. | |
| Waterproofing | Oatey recommends installers and contractors follow manufacturer instructions when installing a waterproof shower system. |
| Using a waterproofing membrane and accessories from a single manufacturer promotes effective waterproofing and efficient drainage. | |
| Pre-sloping is important before installing the waterproofing layer to ensure water can evacuate through the weep holes. | |
| The wallboard behind the tile should be checked to ensure it is waterproof, otherwise, water vapour and moisture can cause damage to surrounding structures. |
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What You'll Learn

Cutting the Oatey shower pan liner
Preparation:
Firstly, lay the Oatey shower pan liner flat on a clean, dry, and open surface. Ensure that the liner is smooth and free of any wrinkles or creases. Use a tape measure to measure out the required dimensions, marking them clearly with a marker or pencil. It is always better to cut the liner slightly larger than needed, rather than too small.
Cutting:
Carefully cut the liner along the marked dimensions. You can use a utility knife or heavy-duty scissors for this step. Take your time and cut in a slow, controlled manner to ensure straight lines and avoid any accidental tears or punctures.
Installation:
Once the liner is cut to size, carefully place it into the shower base, pressing it down to conform to the pre-sloped mortar bed. Work from the center towards the edges, smoothing out any remaining wrinkles or creases as you go. Ensure that the liner is centred and locate the drain opening. Make a small "X" cut directly over the drain to allow for proper drainage.
Securing:
Secure the liner in place by stapling it to the wall framing. Cut away any excess liner that hangs outside the shower dimensions. For corners, do not cut the liner; instead, fold and crease it neatly to form a watertight seal. You can also apply a bead of Oatey PVC/CPE liner adhesive along the folded seams for extra security.
Testing:
Before proceeding with the final installation, it is mandatory to perform a water test. Use a test plug to seal the shower drain, then fill the shower pan with water up to the level of the shower curb. Let the water sit for at least two hours. If the water level remains unchanged, and the surrounding area is dry, your shower pan liner is successfully watertight.
Remember to always follow the manufacturer's instructions and recommendations for Oatey shower pan liners, and ensure that you have the correct measurements before cutting.
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Measuring the liner
To measure the liner for an Oatey shower pan, start by laying the liner on a flat surface. Measure and mark the total length and width of the mortar bed. The total mortar bed length is calculated as: 2 x application height + mortar bed length. The total mortar bed width is calculated as: total curb width + mortar bed width + application height.
Make a five-inch mark up from the curb onto the wall framing. Take measurements from that mark down to the mortar bed to determine the application height.
For the overall curb width, measure the inside and outside heights of the curb, as well as the top width of the curb, and add them together. Measure the length of the curb, then cut a piece of the liner off to those measurements.
Oatey pan liners are marked in 6-inch increments for easy measuring. Pre-fold the edges for easy application of the shower pan liner. Flip the liner over and mark it upwards from the edge according to the application height on three sides. Fold the sides at each mark.
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Preparing the slope
Firstly, ensure your subfloor is in good condition and meets all relevant requirements. A level and defect-free subfloor is essential for a successful installation. Check your local building and plumbing codes for any specific guidelines you need to follow.
Next, if you want to save time and effort, install Oatey's Perfect Slope product to the subfloor. This pre-made slope will make it easier to achieve the correct gradient for drainage. Trim the Perfect Slope to match your shower's dimensions, including the area around the drain, for a seamless fit. Remember, the printed side should face upwards, and no adhesives are required for this step.
If you're not using Perfect Slope, you can create a pre-sloped mortar bed. This process involves applying a layer of mortar to your subfloor at a specific slope or gradient to ensure proper drainage. You'll need to carefully measure and mark the slope before applying the mortar to achieve the correct gradient. Ensure the mortar bed is completely dry and free of any debris before proceeding to the next steps.
Once you've prepared the slope, whether with Perfect Slope or a mortar bed, it's time to lay the shower pan liner. It is important to measure and cut the liner accurately to ensure a watertight seal. Lay the liner flat, mark your dimensions, and then carefully cut the liner using a utility knife or heavy-duty scissors. It's better to aim for a slightly oversized liner than one that's too small.
By carefully following these steps for preparing the slope, you'll be well on your way to a successful Oatey shower pan installation with effective drainage and waterproofing.
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Attaching the liner
Prepare the Surface:
Before laying the liner, ensure that the pre-sloped mortar bed or Oatey's Perfect Slope is dry and free of any debris. It is important to have a flat, smooth surface for the liner to adhere properly and create a watertight seal.
Measure and Cut the Liner:
Lay the shower pan liner on a flat surface and measure the total length and width of the mortar bed. Mark these dimensions on the liner and cut the liner accordingly. It is recommended to pre-fold the edges for easy application.
Drape the Liner:
Remove the test plug from the drain and carefully drape the pan liner over both the mortar bed and the drain base. Ensure that the liner is centred and the wall-facing edges are folded according to the application height.
Secure the Liner:
Use staples or adhesive to secure the liner to the wall framing. Start by stapling or gluing the liner lengthwise, adding adhesive to the corners before also attaching them to the wall framing. Cut away any excess liner that hangs outside the shower dimensions.
Adhere the Corners:
For the corners, cut the liner vertically at the inside corner and adhere it horizontally over the top of the curb. Use staples or adhesive (Oatey X-15 for PVC liners and Oateyweld for CPE liners) to secure the liner in place.
By following these steps and allowing adequate curing time, you can effectively attach the liner of an Oatey shower pan, ensuring a watertight and durable installation.
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Waterproofing the shower
Waterproofing your shower is an important step in the installation process to prevent leaks and mould. Oatey offers a range of waterproofing solutions for showers, including the QuickDrain system, which is compatible with multiple waterproofing techniques. Here are some detailed instructions and tips for waterproofing your shower:
Choose the Right Waterproofing Membrane
Oatey offers a variety of waterproofing membranes, including PVC, CPE, and topical sheet or liquid membranes. PVC and CPE liners are traditional options that come in rolls or pre-cut sizes. Topical sheet or liquid membranes can be painted directly onto the surface to be tiled, offering flexibility and seamless coverage.
Prepare the Subfloor and Slope
Before installing the waterproofing membrane, prepare the subfloor and slope. The subfloor must meet TCNA (Tile Council of North America) standards for stability to prevent cracking and failure of the waterproofing layer. Install Oatey's Perfect Slope or create a pre-sloped mortar bed to ensure proper drainage. The slope should be flush with the top edge of the drain to allow weep water to flow freely to the weep holes.
Install the Waterproofing Membrane
Follow the manufacturer's instructions for installing the waterproofing membrane. For example, with Oatey's PVC Shower Pan Liner Kit, you can cut and fit the liner to your specific requirements. Ensure that the liner does not interfere with the drain's weep holes, as this is vital for effective water drainage. Fold the corners of the liner instead of cutting them, and use dam corners to seal outside corners and curbs.
Test for Waterproofing
After installing the waterproofing membrane, perform a flood test to ensure that your shower bed is watertight. Follow the instructions provided by Oatey for their specific products. Typically, you would pour water into the shower bed at the height of the curb and let it sit for at least two hours. If there are no leaks, the water level should remain the same, and the surrounding area should be dry.
Complete the Installation
Once you have confirmed the effectiveness of your waterproofing, you can move on to the next stages of your shower installation. Choose your drain, tiles, and any other accessories. Oatey offers a wide range of decorative shower drains, preformed shower pans, and accessories to complete your project. Remember to always follow manufacturer recommendations and best practices for a successful installation.
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Frequently asked questions
To cut an Oatey shower pan liner, first lay the liner on a flat surface. Then, use a tape measure and marker to mark out the dimensions of the mortar bed. Finally, carefully cut the liner using a utility knife or heavy-duty scissors.
No, do not cut the liner at the inside corners of the shower. Instead, fold and crease the liner to form a neat, watertight corner.
It is not recommended to cut the liner at the screws for the drain flange as this can lead to tears in the liner.











































