Tile Trim Example: A Bathroom and Backsplash Worked Order

You have five tile edges that need trim, a tape measure, and the supplier's stick length. This worked example runs the full calculation once, with every number shown, so you can repeat it for your own room. The lengths below are worked fixtures, not project quantities.

How much trim does this bathroom and backsplash need?

386 in of edges, plus a 15% overage, equals 443.9 in to cover. Divided by 98.5 in sticks, that rounds up to 5 sticks. The order also needs 3 corner pieces and 1 connector. With one spare stick from the same batch, the supplier order is 6 sticks, 3 corner pieces, and 1 connector.

Which edges go on the list?

Walk the room and record each exposed edge on its own line, in the unit your tape reads. Inside corners take sealant, not trim, so they stay off the list. The tile trim measuring guide shows how to take each reading.

The niche perimeter is 2 × (14 + 20) = 68 in. Add the five edges: 144 + 96 + 48 + 68 + 30 = 386 in.

Why does this job get a 15% overage?

The shower niche has four mitered returns, and the job has several short runs. Trade and retailer guidance lands on 10% for simple straight runs and 15 to 20% where corners, niches, and short pieces eat material in test cuts. The niche pushes this job to 15%.

Planning length = total edges × (1 + overage)

386 × 1.15 = 443.9 in

Keep the unrounded total until the final division. Rounding each edge up to the whole foot first inflates the order before any cutting starts.

How many sticks does 443.9 in need?

Schluter's wall and countertop profiles ship in 8 ft 2-1/2 in sticks, which is 98.5 in per stick. Your supplier's data sheet gives the length for the profile you chose, so use that number on a real order, not this one.

Sticks = planning length ÷ stick length, rounded up

443.9 ÷ 98.5 = 4.51, rounded up to 5 sticks

Five sticks hold 492.5 in against 386 in of edges. The 106.5 in margin covers the miter offcuts and one bad cut, which is what the 15% was meant to buy.

How many corner pieces and connectors?

One outside corner needs 1 corner piece. Two runs end in open space, the wainscot at the vanity and the top of the backsplash end, so they need 2 end caps. One corner piece serves as an outside corner, an inside corner, or an end cap, so the order needs 3 corner pieces in total. The profile and accessory choices are covered in the tile trim profile guide.

The 144 in wall run needs 2 stick pieces, 98.5 in plus 45.5 in, which meet at 1 butt joint, so the order needs 1 connector. A cut plan can combine offcuts and shift where joints land; the tile trim ordering guide shows how to draw one.

What does the final order look like?

The spare stick comes from the same order so its finish matches the installed runs. Finishes can drift between production batches.

How do you check your own numbers?

Redo the whole calculation in the other unit system. When both paths land on the same stick count, the arithmetic holds.

386 in × 25.4 mm = 9804.4 mm, which is 9.8044 m. With the 15% overage: 9.8044 × 1.15 = 11.275 m. The metric stick is 2.5 m: 11.275 ÷ 2.5 = 4.51, which rounds up to 5 sticks. The imperial path said 5 sticks too.

Run two more checks. First, the capacity check: the ordered stick length should exceed the measured edges with room to spare. Here 492.5 in covers 386 in. Second, the edge check: read each measured edge against the tape once more, because a missed niche side or a doubled corner is the most common source of a short order.

What changes this answer?

• A different stick length. Ten-foot sticks or 3 m sticks change the division, so always use the data sheet for the profile on the order.
• Mitered niche corners. Miters use no corner pieces but waste more offcut, which is part of why the niche pushes the overage to 15%.
• Inside corners. They take flexible sealant and stay off the trim list.
• Trim depth sizing is a separate decision, made before the quantity math; the profile guide covers it.
• This math plans metal profile sticks. Ceramic bullnose sells by the piece, so divide the total length by the piece length instead of a stick length.

The seven ordering mistakes that break this kind of math are listed in the tile trim mistakes guide.

Safety and professional scope

Cutting metal trim throws sharp slivers. Wear eye protection and gloves, and deburr every cut end before handling the piece.

This example plans quantities. It does not approve the tile layout, waterproofing, movement joints, or the installation method. Those decisions follow the project documents, the tile manufacturer's guidance, applicable standards, and the responsible installer.