How Do You Cut Cultured Marble Shower Walls Cleanly and Safely?

Cultured marble shower wall panels are cut with a masonry blade in a standard circular saw. Support the panel fully on a flat surface, mark the cut line before you start, and wear eye protection and a dust mask as you would for any masonry cut. Trimming is a normal part of installing Ella's panels because they are molded in stock sizes, as explained in Cultured Marble Shower Wall Panels: Stock Sizes, Cutting to Fit, and Finishing the Edges, and this page follows the cutting job from the first measurement to the sealed edge.

Plan the Cut Before the Panel Arrives

A clean cut starts with choosing the right panel, because the best cut is a short, straight one. Each panel comes out of a mold, so the sizes are fixed at the factory. The largest panel is 60 inches wide by 96 inches tall, and side panels are molded 30, 32, 34 and 36 inches wide.

The rule is to choose the stock size that is equal to or slightly larger than the wall, then trim off the excess. A side wall that measures 29 inches deep, for example, is covered by the 30 inch side panel with 1 inch removed. A panel that is slightly oversized only needs a quick cut. A panel that is too small cannot be stretched to fit.

1. Measure each wall at the top, middle and bottom, and use the largest figure, since walls are not always square.
2. Pick the stock width that meets or exceeds that figure for each side wall.
3. Confirm the back wall is no wider than 60 inches.
4. Note any windows, valves or niches the panel must be cut around.
5. Confirm the selection with your Ella dealer or the team at (800) 480-6850 before your order is placed.

Writing down the three measurements for each wall also tells you how much comes off and whether the wall is out of square, which is useful to know before the saw comes out.

Tools, Setup and Safety

The tool list is short. Cultured marble cuts with a masonry blade in a standard circular saw, which is the usual approach in the industry for this material. No specialty equipment is called for in Ella's guidance.

• Blade and saw. A masonry blade fitted to a standard circular saw.
• Support. A flat surface that supports the panel fully while it is being cut.
• Marking. The cut line is marked on the panel before cutting begins.
• Protection. Eye protection and a dust mask, the same as for any masonry cut.

The panels are made from a natural quartz and granite composite with a gel coat surface, which is why they are treated as a masonry cut. The video on this page shows the travertine wall surround and notes that the multi-piece panels can be carried and installed by one person, so moving a panel to the cutting surface is manageable.

Making the Cut

1. Check your measurement against the wall once more and transfer it to the panel.
2. Mark the full cut line on the panel before cutting.
3. Lay the panel on a flat surface so it is supported fully.
4. Put on eye protection and a dust mask.
5. Cut along the marked line with the masonry blade in the circular saw.
6. Dry fit the panel against the wall before any adhesive goes on, so a second trim can still be made if the wall is out of square.

Cuts around a window, a valve or a niche follow the same method. Those are the openings you noted when measuring, so mark them on the panel from your measurements before cutting.

Finishing and Sealing the Cut Edge

A cut edge does not need to be polished. There are two ways to finish it, and both are simple.

• Caulk. The simplest finish is a bead of caulk along the edge, which can be painted over to match the wall.
• Trim. Where a more finished appearance is wanted, a 2 inch trim piece is applied over the edge.

Ella carries only a few trim options: a 1 inch corner trim in 96 inch lengths that suits inside corners and the ceiling line, and a 2 inch by 3/4 inch flat trim that can cover the gap at the tub.

Finishing the look is one job and keeping water out is another. A factory edge is finished. An edge you cut around a valve, a window or a niche is not, until you seal it or cover it with trim. Trim pieces cover the joint after it is sealed, and they do not replace the sealant. Where the silicone goes on each joint is covered in How do I seal shower wall panels to keep water out?

What the Factory Edges Tell You About Where to Cut

The video states that the panel edges are factory finished for seamless panel joining, but can be trimmed and cut for a custom fit. Those two facts together are a useful guide. The factory edges are made for the seams where one panel meets the next, and a cut edge needs caulk, sealant or trim. It makes sense to plan the layout so the trimmed side of a panel ends up where a caulk bead or a trim piece will finish it, such as a corner, the ceiling line or the gap at the tub.

The video also shows what the panels are glued to. They can be glued over drywall, plaster, painted walls, Durock or even existing tile, and the surrounds come as eight, six or four panel sets. Because the panels go over an existing surface, it is worth measuring the wall as it is today.

If You Would Rather Not Cut at All

Cultured marble is the Ella wall line designed to be trimmed on site. If cutting is not something you or your installer want to take on, the acrylic kits take a different approach, because each kit is built for a specific footprint. The acrylic 6-piece kit covers a 36 by 60 inch alcove to a finished height of 92 inches, and the 3-piece surround is 40 inches deep by 60 inches wide and stands 97 inches tall. The options are described in Where can I buy acrylic shower wall panels for my Ella bathroom?, and the two materials are weighed against each other in Where Can I Buy Cultured Marble Shower Walls, and Is Acrylic Better?

For most remodels the choice comes down to the room. If your alcove matches a kit footprint, a fixed kit goes up without trimming. If your walls are an in-between size, cultured marble panels and a masonry blade let the surround fit the room you have. Your Ella dealer or the team at (800) 480-6850 can confirm the panel sizes for your measurements.

Related Guides

• How Do You Install Cultured Marble Shower Walls in a Bathroom?

Common Questions