
Laying penny tile on a shower floor is a detailed yet rewarding DIY project that can transform your bathroom with a timeless, elegant look. This process involves careful planning, precise execution, and the right materials to ensure durability and water resistance. From preparing the subfloor and applying a waterproof membrane to arranging the tiles in a visually appealing pattern and grouting them for a seamless finish, each step requires attention to detail. With the right tools and techniques, you can achieve a professional-quality result that not only enhances the aesthetic appeal of your shower but also stands up to daily use and moisture. Whether you're a seasoned DIY enthusiast or a beginner, this guide will walk you through the essential steps to successfully install penny tile on your shower floor.
| Characteristics | Values |
|---|---|
| Surface Preparation | Ensure the shower floor is clean, dry, and level. Repair any cracks or damage. |
| Waterproofing | Apply a waterproofing membrane (e.g., liquid waterproofing or sheet membrane) to prevent water damage. |
| Thinset Mortar | Use a modified thinset mortar suitable for wet areas and small tiles. |
| Tile Layout | Plan the layout to minimize cuts and ensure a centered design. Start from the center or a focal point. |
| Tile Adhesion | Apply thinset mortar using a notched trowel (1/4" or 3/16" notch) to both the floor and back of the penny tile sheets. |
| Tile Placement | Press each sheet of penny tiles firmly into the mortar, ensuring full contact and level alignment. Use tile spacers if needed. |
| Grout Lines | Penny tiles typically have small grout lines (1/16" to 1/8"). Ensure consistency across the installation. |
| Grouting | Use a sanded or unsanded grout (depending on grout line width) and apply it diagonally to the tiles. Wipe off excess grout with a damp sponge. |
| Sealing | Seal the grout lines and tiles with a penetrating sealer to protect against moisture and stains. |
| Curing Time | Allow the thinset and grout to cure fully (typically 24-48 hours) before using the shower. |
| Tools Needed | Notched trowel, tile cutter, rubber float, sponge, grout sealer, waterproofing membrane, mixing tools, and safety gear. |
| Difficulty Level | Moderate to advanced, depending on experience with tiling and waterproofing. |
| Time Required | 1-2 days, including drying and curing times. |
| Cost | Varies based on materials (tiles, thinset, grout, waterproofing) and tools. Penny tiles can be more expensive than larger tiles. |
| Maintenance | Regular cleaning and resealing of grout lines every 1-2 years to maintain water resistance. |
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What You'll Learn
- Prepare the shower floor surface: Clean, dry, and level the floor for tile adhesion
- Plan tile layout: Measure and mark the floor, ensuring proper alignment and spacing
- Mix thin-set mortar: Follow manufacturer's instructions for consistent, workable mortar application
- Set penny tiles: Press tiles into mortar, using spacers for even gaps and design
- Grout and seal: Apply grout, wipe excess, and seal tiles for water resistance and durability

Prepare the shower floor surface: Clean, dry, and level the floor for tile adhesion
A clean, dry, and level surface is the foundation of a successful penny tile installation. Any debris, moisture, or unevenness can compromise adhesion, leading to cracked tiles or grout failure. Think of it as preparing a canvas for a masterpiece – the smoother and cleaner the base, the more stunning the final result.
Before you begin, remove all existing flooring material, including old tile, adhesive, and grout. Use a chisel and hammer for stubborn remnants, and a floor scraper to ensure a smooth, even surface.
Cleaning goes beyond a quick sweep. Grease, soap scum, and even dust can hinder adhesion. Use a degreasing cleaner specifically designed for tile preparation, following the manufacturer's instructions for dilution and application. Scrub thoroughly with a stiff brush, paying extra attention to corners and edges. Rinse the floor completely and allow it to dry for at least 24 hours. Remember, moisture trapped beneath the tile can lead to mold and mildew growth.
For a truly level surface, consider using a self-leveling compound. This pourable material fills in low spots and creates a perfectly flat plane for your tiles. Follow the product instructions carefully, ensuring proper mixing and application thickness. Allow the compound to cure completely before proceeding.
While a perfectly level floor is ideal, minor imperfections can be addressed during tile installation. Use a notched trowel to apply a thin-set mortar, which will fill small gaps and create a strong bond. However, significant dips or humps will require more extensive preparation, such as grinding down high spots or building up low areas with mortar.
By meticulously preparing your shower floor surface, you're investing in the longevity and beauty of your penny tile installation. A clean, dry, and level base ensures a strong bond, preventing future problems and guaranteeing a stunning shower floor that will last for years to come.
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Plan tile layout: Measure and mark the floor, ensuring proper alignment and spacing
Before you start laying penny tiles on your shower floor, precision in planning is paramount. A misaligned tile can throw off the entire aesthetic, so measuring and marking the floor is your first critical step. Begin by sketching a rough diagram of your shower floor, noting the dimensions and any obstacles like drains or corners. This visual guide will help you determine the starting point and ensure symmetry. Use a tape measure to verify the actual dimensions, accounting for any slight variations in the space. Remember, penny tiles are small, so even a millimeter off can compound into a noticeable error over the expanse of the floor.
Once you have your measurements, mark the center of the shower floor with a chalk line or a pencil. This centerline will serve as your anchor point, ensuring the tiles radiate outward evenly. From here, use a straightedge to draw additional lines perpendicular to the center, creating a grid that guides tile placement. For penny tiles, spacing is just as crucial as alignment. Use tile spacers (typically 1/8 inch for penny tiles) to maintain consistent gaps between tiles. If your shower floor has irregular edges, consider dry-fitting tiles along the perimeter to identify where cuts will be needed, ensuring the pattern remains balanced.
A common mistake is starting without considering the tile pattern’s flow. Penny tiles often create a circular or floral design, so visualize how the pattern will interact with the shower’s features. For instance, aligning the pattern with the drain can create a cohesive look, while ignoring it may result in awkward cuts or misalignment. If your shower has a niche or bench, plan how the tiles will wrap around these elements, ensuring the pattern continues seamlessly. This foresight prevents backtracking and wasted materials.
Finally, double-check your markings before committing to adhesive. Lay out a few rows of tiles along the marked lines to ensure they align as planned. Adjust any lines that seem off, and ensure the tiles fit snugly against walls and obstacles. This dry run is your safety net, allowing you to correct errors without the permanence of adhesive. Once satisfied, your floor is ready for the next step: applying the mortar and laying the tiles. Precision here saves time and frustration later, ensuring a professional finish that elevates your shower’s design.
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Mix thin-set mortar: Follow manufacturer's instructions for consistent, workable mortar application
The foundation of a successful penny tile installation lies in the thin-set mortar, a critical adhesive that binds the tiles to the shower floor. Mixing this mortar correctly is not just a step—it’s the cornerstone of durability and aesthetics. Manufacturers design their thin-set products with specific ratios and curing times, ensuring optimal adhesion and flexibility. Ignoring these instructions can lead to cracks, uneven surfaces, or tiles popping loose over time. Thus, precision in mixing is non-negotiable.
To begin, gather the necessary tools: a clean bucket, a mixing paddle (drill attachment), water, and the thin-set mortar itself. Start by pouring the recommended amount of water into the bucket, typically 5–6 quarts per 50-pound bag of thin-set. Gradually add the mortar while mixing at low speed to avoid air pockets. Aim for a consistency similar to peanut butter—thick enough to adhere but workable enough to spread. Overmixing can weaken the bond, while undermixing leaves lumps that hinder application. Follow the manufacturer’s timing guidelines, usually 5–10 minutes of mixing, and let the mixture slake (rest) for 5–10 minutes before remixing briefly.
Comparing thin-set mortar to other adhesives highlights its superiority in wet environments like showers. Unlike mastic, thin-set is cement-based, making it waterproof and resistant to mold and mildew. Its flexibility accommodates minor substrate movements without cracking, a common issue with rigid adhesives. However, this advantage is only realized when mixed correctly. For instance, using too much water dilutes the polymer additives, reducing its bonding strength. Conversely, too little water results in a dry, unspreadable mix. Balance is key.
Practical tips can elevate your mixing process. Always use clean tools to prevent contamination, which can weaken the mortar. If the mix becomes too thick during application, resist the urge to add more water; instead, remix the existing batch or prepare a new one. For large projects, mix smaller batches to maintain workability, as thin-set sets quickly. Finally, store unopened bags in a dry place to prevent moisture absorption, which can cause premature hardening.
In conclusion, mixing thin-set mortar is a science that demands attention to detail. By adhering to manufacturer instructions and employing practical techniques, you ensure a consistent, workable application that forms the backbone of your penny tile shower floor. This step, though seemingly mundane, is where the longevity and beauty of your project truly begin.
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Set penny tiles: Press tiles into mortar, using spacers for even gaps and design
Pressing penny tiles into mortar is a delicate dance between precision and creativity. Unlike larger tiles, penny tiles demand meticulous placement due to their small size and the cumulative impact of even minor misalignments. Begin by spreading a thin, even layer of mortar over a manageable area, typically no larger than 2-3 square feet, using a notched trowel with a 1/8-inch V-notch. This ensures proper adhesion without excess mortar seeping through the gaps. Work swiftly, as mortar sets quickly, especially in humid environments like showers.
The role of spacers in penny tile installation cannot be overstated. While traditional tile spacers may seem cumbersome for such small tiles, specialized penny tile spacers—often cross-shaped or circular—are essential for maintaining consistent gaps. Insert spacers between tiles as you press them into the mortar, ensuring a uniform 1/16-inch gap. This not only creates a polished, professional look but also allows for grout to flow smoothly, enhancing both aesthetics and durability. For intricate designs, such as herringbone or radial patterns, spacers help maintain the intended layout without distortion.
Pressing the tiles into the mortar requires a light but firm touch. Use your fingers or a flat-edged tool to gently press each tile into place, ensuring it adheres fully to the mortar bed. Avoid pressing too hard, as this can displace the mortar or cause tiles to shift. Periodically step back to inspect the layout, adjusting tiles as needed to maintain alignment and pattern integrity. For curved or sloped shower floors, pre-plan the tile arrangement to account for the surface’s contours, ensuring tiles follow the slope without creating uneven gaps.
One common pitfall is neglecting to account for grout thickness when using spacers. While 1/16-inch gaps are standard, the final appearance depends on the grout’s width and color. For a seamless look, choose a grout color that matches the tiles, minimizing visual contrast. Conversely, a contrasting grout can emphasize the individual tiles, adding texture and depth. Test the grout color on a small section before committing to the entire floor, as wet grout may appear darker than its final cured state.
In conclusion, setting penny tiles into mortar is a blend of technical skill and artistic vision. By using spacers judiciously, pressing tiles with care, and planning for grout aesthetics, you can achieve a shower floor that is both functional and visually stunning. Patience and attention to detail are key, as the cumulative effect of each small tile contributes to the overall impact of the finished design.
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Grout and seal: Apply grout, wipe excess, and seal tiles for water resistance and durability
Grout is the unsung hero of any tile installation, especially in a shower where water resistance is critical. After laying your penny tiles, the grout fills the gaps, providing structural integrity and preventing water from seeping beneath the surface. Choosing the right grout is essential—epoxy grout is highly recommended for shower floors due to its superior water resistance and durability compared to cementitious grout. Once mixed to a smooth, peanut butter-like consistency, apply it diagonally across the tiles using a rubber float, ensuring it fully penetrates the joints. Work in small sections to maintain control and avoid drying.
Wiping excess grout is an art that balances speed and precision. Allow the grout to set for 10–15 minutes, then use a damp sponge to gently remove the haze from the tile surfaces. Rinse the sponge frequently to avoid pushing grout back into the joints. Be cautious not to over-wipe, as this can pull grout from the seams, compromising the installation. Repeat the process after 20 minutes to ensure a clean, polished finish. Patience is key—rushing this step can lead to uneven results or damage to the grout lines.
Sealing the tiles is the final step in safeguarding your shower floor against moisture and stains. Most penny tiles, particularly those made of porcelain or ceramic, do not require sealing, but the grout does. Use a penetrating grout sealer, applying it with a small brush or spray bottle. Allow the sealer to sit for 5–10 minutes, then wipe off any excess with a clean cloth. For best results, apply a second coat after 24 hours. Sealing not only enhances durability but also simplifies maintenance, as it prevents dirt and grime from adhering to the grout.
A common mistake is neglecting to test the sealer on a small area first, which can lead to discoloration or uneven absorption. Additionally, avoid walking on the shower floor for at least 48 hours after sealing to ensure the product fully cures. Properly grouted and sealed penny tiles can last decades, making this step a worthwhile investment in the longevity of your shower. By following these precise steps, you’ll achieve a waterproof, resilient surface that complements the unique aesthetic of penny tiles.
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Frequently asked questions
Ensure the shower floor is clean, dry, and level. Remove any debris, grease, or soap scum. Apply a waterproofing membrane and allow it to cure according to the manufacturer’s instructions. Finally, apply a thin layer of thinset mortar to create a smooth, even surface for the tile.
Start by finding the center of the shower floor and mark it. Use a chalk line or straight edge to create reference lines. Begin laying the penny tile sheets from the center outward, pressing them firmly into the thinset. Use tile spacers if needed to ensure consistent spacing between sheets.
Use a polymer-modified thinset mortar for better adhesion and flexibility, especially in wet areas. For grout, choose a sanded grout for joints wider than 1/8 inch or an unsanded grout for smaller joints. Consider using epoxy grout for added durability and water resistance in showers.
After the grout has cured (usually 48–72 hours), apply a high-quality penetrating sealer to both the tile and grout. Follow the sealer’s instructions for application and reapplication. Regularly reseal the shower floor every 1–2 years to maintain water resistance and protect against mold and mildew.






















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