If you don’t have a circular saw, you may be able to ask the employees to cut your board for you when you purchase it.

You can buy tar paper from your local hardware or home improvement store. If you need to use multiple pieces of tar paper, make sure the pieces overlap by at least 2 inches (5. 1 cm).

If you don’t already have a floor drain in place, hire a plumber to install the pipes for you so it’s done correctly. Make sure you have a 2-part drain with an upper and lower flange. You can buy 2-part drains from your local home improvement store.

If you don’t have any duct tape, you can also shove a cloth into the drain pipe to prevent mortar from getting inside.

If your mortar is too runny, it will be difficult to apply since it won’t hold its shape as well. The amount of mortar you need depends on the size of your shower pan. For a 4 ft × 4 ft (1. 2 m × 1. 2 m) shower pan, you need approximately 2 bags that are each 30 pounds (14 kg) of mortar.

Shaping the border first isn’t necessary, but it makes it easier to slope later on.

The first layer of mortar doesn’t have to be perfectly smooth, but it needs to have the correct slope in order to move on. Make sure you apply the entire layer of mortar in 1 day, or else it could dry unevenly.

You can buy shower liner from a local home improvement or hardware store. Waterproof membranes can also be made in sheet (a blend of plastics), liquid, or foam form.

You can buy silicone sealant from your local hardware store.

You can also cut the hole out entirely, but it may cause some water to leak between the drain and the liner.

Don’t screw the top flange into the drain until it’s flush since you need to add another layer of mortar.

If you’re putting tile in your shower pan, be sure to leave enough space between the mortar and the top of the drain so the tile is flush with the drain.

Choose tiles that match other fixtures in your bathroom so it looks like a cohesive space. The number of tiles you need depends on the size of your shower pan and the style that you’re using.

Don’t put tiles on your mortar while it’s wet or they may not adhere as well.

You can buy tile thinset from your local hardware store.

If you want all your tiles to be the same distance apart, then use tile spacers so the shower pan looks uniform.

You can buy tile grout from your local home improvement or hardware store.