How do you finish the edge of a bathtub tile?

When installing tile in a bathtub surround, finishing the edges properly is one of the most important steps. The tub edge receives a lot of wear and tear from daily use, and an unfinished edge can allow water to seep behind the tile, leading to leaks and damage. There are a few different options for finishing a tub edge, each with their own pros and cons. Choosing the right edging treatment and applying it correctly will help create a durable, water-tight tub surround that will last for years.

What are the options for finishing a bathtub tile edge?

There are three main options for finishing the exposed edge of bathtub tile:

Bullnose Tile

Bullnose tile has a rounded finished lip that covers the rough tile edge. Bullnose tiles are made to match standard wall tiles and create a smooth, seamless transition from the tub lip to the tub surround. The rounded bullnose can have a radius of 1/4″, 1/2″, or 3/4″. A larger radius looks more modern and creates a softer edge.

Schluter Tile Edging

Schluter makes metal edging strips that get embedded into thinset mortar. Popular options include Schluter Jolly and Rondec. These edging strips create a clean, modern look, especially with larger format tiles. The metal edging protects the tile edge and prevents cracking.

Caulk

The tile edge can simply be filled with a flexible tub and tile caulk. This is the easiest option but looks more basic than bullnose or metal edges. Choosing a high-quality caulk and neat application is key to get a smooth finish.

What are the benefits of using bullnose tile?

There are several benefits to using bullnose tile to finish a bathtub edge:

• Creates a smooth finished edge – The rounded lip of the bullnose tile covers any rough edges for a seamless look.
• Matches the tub surround tile – Bullnose tiles are made to coordinate with the corresponding field tile for a unified appearance.
• More durable than caulk – The glazed ceramic bullnose tile holds up better over time than caulk.
• Customizable radius – Bullnose edge tiles are available in different radius sizes from 1/4″ to 3/4″ to match your preferences.
• Full coverage – Bullnose tiles cover the entire tub edge, protecting tile corners and edges.

The main downside to bullnose tiles is the cost, which is higher than basic caulk. However, the benefits of bullnose tile make it a popular choice for finishing bathtub surrounds.

What are the benefits of using Schluter edges?

Schluter metal edging strips also have several advantages for finishing tub edges:

• Slim, modern look – Schluter edges create clean lines and contemporary style.
• Good for large format tiles – Metal edges prevent chipping on oversized tiles.
• Variety of finishes – Schluter strips come in polished chrome, satin nickel, and more.
• Protects tile edges – The metal strip is durable and protects vulnerable tile corners.
• Matches grout joints – Designed to align with grout joint width.

The main downside to Schluter edging is the higher cost compared to basic caulk. Proper installation is also key to get a smooth finish with no lippage between tiles and edging.

What are the benefits of using caulk?

Caulk offers a few advantages as well:

• Lowest cost option – Basic tub caulk is relatively inexpensive.
• Easy installation – Caulking the edge is simple and fast.
• Flexible – Caulk can expand and contract with tub movement.
• Smooth finish when applied properly – Neat application of quality caulk can flow into a smooth edge.

The downsides are that caulk is not as durable, often needs replacing sooner, can attract dirt, and does not provide full edge protection. Caulk also relies heavily on application skill.

How do you prepare the tub edge before installing bullnose tile?

Proper preparation of the tub edge is crucial before installing bullnose edging tile. Here are the key steps:

1. Protect tub surface – Mask off the tub lip to prevent thinset and grout from contacting the tub surface.
2. Clean edge – Use a scraper and then a cleanser to remove any dirt, oil or residue from the lip.
3. Dry fit bullnose – Do a dry run first to ensure the bullnose tiles fit correctly around the tub curve.
4. Apply thinset – Spread a thin layer of thinset mortar adhesive on the tub ledge area.
5. Pre-slope with mortar – Build up the thinset slightly sloped on the outer corner.

This prepares the tub edge so the bullnose tiles can be firmly attached in a sloped manner to prevent water pooling on the flat lip.

What are the steps to install bullnose tile on a tub edge?

Here is a summary of the key installation steps:

1. Dry fit tiles – Do a dry layout first to determine optimal tile placement and cuts.
2. Apply thinset – Use a notched trowel to spread a layer of thinset on the tub lip area.
3. Press and align – Set bullnose tiles into thinset, aligning evenly with tub edge and surrounding tiles.
4. Check level – Use spacers to ensure an even face plane with field tiles.
5. Clean up excess thinset – Remove any squeeze-out before thinset dries.
6. Allow to set – Let mortar cure fully before grouting, typically 24 hours.
7. Grout tiles – Use appropriate grout for joints, remove excess gently.
8. Seal grout – Apply grout sealer once cured to protect from water.

Take care during installation to keep gaps even and keep the bullnose tile edges aligned neatly.

What thinset mortar is best for bullnose tub edging?

The best thinset mortar for bullnose tub tiles is one formulated for wet area and high adhesion. Key features to look for include:

• Polymer-modified – Contains polymers to improve adhesion and strength.
• Non-sag formula – Holds shape on vertical surfaces.
• Water-resistant – Won’t break down from tub moisture.
• Extended open time – Allows adjusting tiles into position.
• Flexible – Accommodates normal tub movement or vibration.

Popular choices include Custom’s MegaFlex Crack Prevention Mortar, Mapei’s Adesilex P10 mixed with Planicrete 50, or Laticrete Hydro Ban. Using a quality thinset suitable for wet areas is vital for proper bullnose installation.

What grout should be used with bullnose tub edging?

An epoxy grout is the best choice for grouting bullnose tub edging. Epoxy grout has properties ideal for wet bathtub surrounds:

• Waterproof – Repels water completely to prevent leaks or damage.
• Strong adhesion – Bonds tightly to maintain a lasting watertight seal.
• Resists mold and mildew – Contains antimicrobial ingredients.
• Minimal shrinkage – Stays tightly packed in joints.
• Stain-proof – Withstands dirt, grime, and chemicals.

Popular epoxy grout options include Laticrete SpectraLOCK PRO, Mapei Kerapoxy CQ, or Custom’s Prism SureColor. Using any high-quality epoxy grout suitable for wet areas is recommended.

What are the steps to install Schluter edging?

Schluter metal edging strips take a little different approach to install:

1. Cut edging to fit – Use snips to cut strips to match tub edge length.
2. Dry fit edges – Run a dry layout to ensure proper fit at corners.
3. Apply thinset to edge and substrate – Use non-sag thinset on tub lip and back of strips.
4. Press edging into place – Embed metal into mortar for solid adhesion.
5. Grout edge – Grout between tile and edging strip with tub caulk or grout.
6. Seal joints – Use silicone sealer for inside tile-edging corners.
7. Clean up excess – Remove any thinset or grout from tile or metal surfaces.

The key is making sure to fully embed the Schluter edging into the thinset mortar for proper support.

What thinset mortar works with Schluter edging?

As with bullnose tile, the thinset used to install Schluter edging should be designed for wet area adhesion. Look for the same features like polymer modification, non-sag, and flexibility.

Schluter also makes their own thinset called Kerdi-Fix that is commonly used. It comes in a tube form for easier application on the edging underside. Other good options are the same thinsets used with bullnose, such as Mapei Adesilex P10 or Laticrete Hydro Ban.

What grout options work with Schluter edging?

Any high quality epoxy grout designed for wet areas will also work well with grouting the small joints between the Schluter edge and tile. An epoxy grout provides a waterproof, durable joint.

Standard cement grout is also an option for Schluter edging grout. Make sure to use a grout suitable for wet areas and apply a penetrating sealer after curing. Colored grout will match the surrounding field tile and create a coordinated finished edge.

What are some caulking tips for a clean tub edge?

Here are some tips to caulk a bathtub edge neatly:

• Choose high quality caulk – 100% silicone tub and tile caulk adheres well and withstands moisture.
• Prep the surface – Ensure the tub edge and tile are clean and dry first.
• Tape edges neatly – Use masking tape on the tub and tile edges for super straight caulk lines.
• Load caulk tube into gun – Cut the tip to fit the joint width and load cartridge.
• Apply steady pressure – Keep caulk gun at consistent angle and smoothly run the bead.
• Tool the caulk – Use a rounded plastic tool to shape the caulk into a smooth, rounded profile.
• Remove tape – Carefully pull up tape immediately after tooling caulk.
• Let cure – Give caulk full drying time before exposure to water.

Taking the time to neatly run, tool, and shape the caulk will result in a finished look.

What are some potential issues with unfinished tub edges?

Leaving a bathtub surround tile edge completely unfinished can lead to several problems down the road:

• Leaks – Water can seep under the tile edge and leak into the wall framing.
• Cracked tiles – Tiles can crack at vulnerable corners or chip over time.
• Grout deterioration – Lack of sealant allows moisture damage to grout.
• Discoloration – Grime, soap scum, and mildew can stain the unfinished edge.
• Dirt buildup – Rough, unfinished edges attract dirt.
• Sharp edges – Exposed cut tile edges can be uncomfortable on skin.

Even applying a quality caulk is better than leaving the edge completely exposed. Some type of edging finish prevents water damage and improves appearance over time.

Conclusion

Choosing the right edging treatment for a new bathtub surround has both functional and aesthetic considerations. Bullnose tile or Schluter edging provide the most durable, built-in protection with an integrated finished look. While caulking the edge is more basic, done neatly it offers a low cost, flexible option. Each has their own benefits and limitations.

The key is properly preparing the tub lip, methodically applying the selected edging, using quality wet area materials, and neatly grouting and sealing the joints. Taking care with edge finishing helps ensure the tub surround stays leak-free and looks great for many years of daily use.