Tillie Doyle
Installing a shower pan liner can be a challenging task, especially for beginners. It is a crucial step in ensuring a waterproof seal for your shower. The process involves several steps, including preparing the drain, cutting and fitting the liner, and securing it in place. One of the most critical aspects is properly installing the liner in the corners to prevent leaks. This often involves folding the liner neatly into the corners and securing it with staples, nails, or adhesive, ensuring a snug fit.
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What You'll Learn
Cut the liner vertically at the inside corner and adhere it horizontally
To install a pan liner in the corners, you must first cut two pieces of scrap liner according to the width of the curb and a height of around 6 inches. Adhere both these pieces on either side of the curb's top, ensuring that half of each piece is on the curb and the other half is on the wall framing. Next, cut the liner vertically at the inside corner. Now, adhere the liner horizontally over the top of the scrap liner. This step ensures that the liner is secured smoothly and snugly over the scrap liner.
After this, staple the liner to the wall framing. It is important to cut away any excess liner that hangs outside the shower dimensions. This ensures a neat finish and prevents any bunching or creasing of the liner. Finally, adhere the excess pan liner for the mortar bed over the curb and staple the outside of the curb again.
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Fold corners and staple liner to wall framing
When installing a pan liner, it is important to get the corners folded correctly to avoid water damage or leaks. First, ensure that the pan liner is centred and the drain plug is in place. Cut X shapes over the bolts that the clamping ring screws into and cut out a hole over the drain hole. Fold the pan liner halfway over to expose the drain base, apply silicone caulk, and then fold the liner back over. After pushing the bolts through the X shapes, screw down the clamping ring and tighten the bolts until it fits snugly against the liner.
Now, fold the corners and staple the liner to the wall framing lengthwise. Use pan liner adhesive in the corners to adhere them together before stapling them to the wall framing. For PVC liners, use Oatey X-15, and for CPE liners, use Oateyweld.
If you can adjust the rough framing, leave 1/4 inch of additional space at each corner end. This allows for the storage of excess CPE membrane material that bunches up when you round the corner. If the framing cannot be adjusted, keep the corner folds as flat and tight as possible.
When stapling, only staple the top 1/2 inch of the liner for maximum waterproof protection. Do not staple the liner within 6 to 8 inches of the floor on the walls, as any punctures in these areas may lead to leaks or water damage.
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Bond dam corners in the cut area
To bond dam corners in the cut area, you must first identify the type of liner you are using. For PVC liner installations, use X-15; for CPE liner installations, use Oateyweld.
Locate the drain hole on the drain base and cut out the pan liner material to fit the dimensions of the drain hole. Place the clamping ring over the bolts and slide it counterclockwise to lock it in place. Tighten the bolts to ensure a snug fit. Ensure that the weep holes are clear of any residual pan liner material or silicone.
To test the installation, close off the drainpipe opening with a test plug. Then, fill the shower floor with water, letting it sit just below the curb for at least two hours, or preferably four hours. This will allow you to determine the waterproof status of your shower pan liner application.
It is important to note that staples or screws are unnecessary when working with dam corners. Instead, use adhesives to stick the dam corners to any intersection between a curb and the wall framing. Allow the adhesives to cure overnight.
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Adjust the bed of sand with a stick or dowel to help level the floor
When installing a shower pan liner, it is important to ensure that the bed of sand is level. This can be achieved by using a stick or a dowel to adjust the sand and create an even surface for the liner to rest on.
First, spread the sand evenly over the liner surface, ensuring that it does not get into the drain and clog the weep holes. Use a carpenter's level to check that the floor is level. If adjustments are needed, use a stick or dowel to gently move and adjust the sand until the floor is level in all directions. Make sure that the bed of sand has even contact with the underside of the composite floor.
The stick or dowel can help to smooth out any bumps or uneven areas in the sand. It is important to take your time during this step to ensure that the floor is level before proceeding with the installation.
Once the sand is level, you can place the pan on top. For single-piece composite pans, it is important to ensure that the pan is level in all directions. The weight of the composite material means that you may need assistance during this step.
After the pan is in place, you can install the cement board walls, ensuring that the bottom of the cement board rests snugly on top of the composite floor. This will help to keep the pan in place and provide a secure foundation for the shower pan liner.
By taking the time to carefully adjust the bed of sand with a stick or dowel, you can ensure that your shower pan liner installation is level and secure, creating a sturdy and long-lasting foundation for your shower.
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Cut out a hole over the drain hole
To cut out a hole over the drain hole, first ensure that the pan liner is centred before locating the drain plug. Then, cut an X shape over the four bolts that the clamping ring screws into. Now, cut out a hole over the drain hole. Fold the pan liner halfway over to expose the drain base. Apply silicone caulk around the surface of the inner flange. Fold the liner back over, push the bolts through the X shapes in the liner and screw the clamping ring down over the bolts. Finally, tighten the bolts until the ring has a snug fit against the liner.
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Frequently asked questions
You will need a pan liner kit, a tile shower drain, a wrench, mortar, silicone caulk, a marker, measuring tape, a utility knife, a staple gun or hammer and nails, bonding adhesive, and a drain plug.
Before installing the shower pan liner, install the waterproof wallboard, positioning the bottom edge of the panels 1/4 inch above the finished height of the tile floor.
Cut the liner vertically at the inside corner and adhere it horizontally over the curb. Staple the liner to the wall framing and cut away any excess.
Plug the drain pipe and fill the shower basin with water just below the top of the curb. Let it sit for at least two hours, or preferably four hours, and check for leaks.
When framing a shower, leave 1/4 inch of additional space at the end of each corner. This provides room for the extra liner material that bunches up when you round the corner.
