Natural Unglazed Zellige Tile

ZELLIGE TILE INSTALLATION GUIDE

Moroccan Zellige Tile Installation Guide

A Comprehensive Guide for DIY Homeowners and Professional Installers

Reno Source

www.therenosource.com

BEFORE YOU BEGIN

Zellige tiles require specialized knowledge and techniques that differ significantly from standard ceramic or porcelain tile installation. We strongly recommend working with a tile professional who has direct experience installing handmade Moroccan tiles. Attempting installation without proper expertise often leads to unsatisfactory results and unnecessary material waste. Reno Source provides these tiles and this installation guidance as a resource but cannot assume responsibility for the installation process or any issues that arise during or after installation. Following these guidelines carefully will help ensure the best possible outcome for your project. 

 

1. OVERVIEW

Zellige, pronounced zell eej, is a traditional form of terra cotta tilework that originated in Morocco more than a thousand years ago. Artisans in Fez continue to produce these tiles using techniques passed down through generations. Each tile is hand formed from local clay, glazed with natural mineral pigments, and fired in wood burning kilns. The result is a tile with exceptional depth and movement. Glazes pool and shift during firing, creating surfaces that reflect light in complex ways. No two tiles are identical, and this variation is central to the appeal of authentic zellige. When installed properly, a zellige surface has a luminous, almost liquid quality that cannot be replicated by machine made tiles.

Natural Variations to Expect

Authentic zellige tiles include a wide range of natural characteristics. Surface texture may include subtle waves, dimples, and undulations in the glaze. Color variation occurs naturally, with shifts in tone and depth even within the same color batch. Tile thickness can vary up to approximately 1.5 millimeters, and edges are intentionally irregular. Fine crazing patterns in the glaze are common and considered a desirable feature rather than a defect. Minor imperfections such as small chips, pits, or glaze inconsistencies may appear on approximately 15 to 20 percent of tiles. These qualities define the beauty of zellige. If a uniform, machine precise appearance is preferred, zellige may not be the right material for the project.

This guide primarily addresses glazed zellige tile. If installing unglazed natural zellige, pay close attention to sections specifically labeled for unglazed material, as key steps differ.

 

2. TOOLS AND MATERIALS

Required tools include a notched trowel sized either one quarter inch by one quarter inch or three sixteenths inch by three sixteenths inch V notch, a flat margin trowel for back buttering, a rubber grout float, clean buckets for soaking and mixing, a mixing paddle and drill, a wet saw with diamond blade, tile nippers, two foot and four foot levels, measuring tape and pencil, sponges and clean cloths, eye protection, and a dust mask.

Materials required include a flexible medium bed white thinset mortar. Gray thinset should never be used, as it can show through the translucent glaze and alter the appearance of the tile. Unsanded grout is required due to the narrow joint spacing typical of zellige installations. A penetrating sealer is recommended for wet areas and required for all unglazed installations, with Fila MP90 Eco Plus recommended. Appropriate substrates include cement board, concrete, or drywall for backsplashes only. Waterproof membranes are required for showers, floors, and any wet installations.

 

3. STEP BY STEP INSTALLATION

 

Step 1 Inspecting the Tile

Open all boxes and inspect tiles for shipping damage before installation. Verify quantities and ensure sufficient material is available before beginning. Spread tiles from multiple boxes to view the full range of color and surface variation. Contact Reno Source with any questions before installation begins, as concerns regarding tile characteristics cannot be addressed after tiles are installed. Order a minimum of 15 percent additional material for cuts, waste, breakage, and future repairs. For a more curated or selective installation, ordering 20 to 25 percent extra material is recommended.

Step 2 Surface Preparation

The substrate must be structurally sound, flat, clean, and dry. The surface must be rigid with no flex or movement. Flatness must be within one eighth inch over ten feet. Use leveling compound to correct low areas and grind high spots as needed. Remove all dust, paint, oils, and contaminants that could interfere with adhesion. Moisture within the substrate can cause adhesion failure and efflorescence, appearing as white mineral deposits.

For wet areas such as showers or tub surrounds, apply a waterproof membrane over the entire installation area. Use waterproof cement board where required. Seal all seams, corners, and penetrations and allow waterproofing materials to cure fully before proceeding.

Step 3 Layout Planning

Discuss the desired aesthetic with the installer before setting tile. Zellige can be installed to emphasize its handmade irregularity or arranged for a cleaner and more controlled look. Lighting conditions significantly affect appearance, as direct light enhances brightness while shadowed light deepens color. View tiles in the actual installation space before finalizing layout decisions. Grout color plays a major role in the final appearance. Matching grout creates a seamless surface, while contrasting grout highlights individual tiles. Perform a full dry layout using tiles from all boxes, positioning tiles with pronounced features thoughtfully and planning cuts around obstacles. Photograph the dry layout for reference during installation.

Step 4 Preparing and Setting Tiles

Glazed zellige tiles should be briefly soaked in room temperature water for one to two minutes before installation to remove dust and improve adhesion. Unglazed zellige should never be soaked, as water absorption into the porous clay can cause efflorescence that is extremely difficult to remove.

Mix thinset according to manufacturer instructions to a thick paste like consistency. Spread thinset onto the substrate in small sections using the notched trowel. Back butter every tile with a thin layer of thinset, which is critical for handmade tile installations. Comb thinset in consistent directions on both the tile and substrate to eliminate air pockets.

Set tiles by pressing them firmly into place using the heel of your hand. Do not use a rubber mallet, as the force can crack delicate handmade tiles. Traditional zellige installations use very minimal spacing, typically one millimeter or less, with a maximum recommended joint width of one sixteenth inch. Small wedge spacers may be used to maintain consistency. Some height variation between tiles is normal and expected. Clean thinset that squeezes up between tiles immediately.

Step 5 Cutting

Use a wet saw with a diamond blade for precise cuts. Tile nippers can be used for small adjustments. Wear eye protection and ensure adequate ventilation during cutting.

Step 6 Curing

Allow thinset to cure fully for 24 to 48 hours depending on site conditions. Do not walk on floor installations or apply pressure to wall tiles during this period.

Step 7 Grouting

Use unsanded grout mixed to a slightly looser consistency than typical grout to allow it to flow into the narrow joints. Work grout into joints using a rubber float held at an angle, moving diagonally across the surface to avoid pulling grout from joints. Fill small pits and chips in the tile surface, as grout will help visually blend these imperfections. Work in small sections and wipe excess grout after 15 to 20 minutes using a damp sponge with diagonal strokes. Polish the surface with a soft dry cloth once grout haze appears. Do not allow grout to dry on the tile surface, as dried grout can permanently damage the delicate glaze and removal may scratch the finish.

Step 8 Sealing

For glazed zellige installed in dry locations such as backsplashes or fireplace surrounds, sealing is not required. For glazed zellige in wet locations such as showers or tub surrounds, apply a penetrating sealer only after grout has fully cured. Allow approximately 28 days before sealing wet area installations.

Unglazed zellige must be sealed both before and after grouting. Before grouting, apply a penetrating sealer and allow it to dry completely. After grouting, apply a matte finish protective wax in thin coats. Unglazed installations should be resealed every one to two years depending on wear and exposure.

 

4. TIPS AND WARNINGS

Successful zellige installations require patience, careful planning, and experienced workmanship. Blend tiles thoroughly from all boxes throughout installation. Clean continuously as you work, as dried thinset and grout are difficult to remove. Always use white thinset, as gray thinset can show through translucent glazes. Keep spare tiles for future repairs, as later batches may vary in color. Embrace the natural imperfections of the tile, as they are what give zellige its distinctive character.

Common issues include uneven surfaces caused by inconsistent thinset application, grout haze from grout left on the surface too long, and efflorescence caused by moisture migration. Proper back buttering, frequent cleaning, and moisture control help prevent these issues.

 

5. CARE AND MAINTENANCE

Clean zellige surfaces with a soft damp cloth and mild pH neutral soap when needed. Dry with a soft towel to prevent water spots. Avoid acidic cleaners such as vinegar or citrus products, bleach, abrasive tools, ammonia, or harsh solvents, as these can damage the glaze. Re seal wet area installations annually or as needed. Inspect grout lines periodically and repair cracks promptly. Address water intrusion immediately. Over time, zellige will develop a natural patina that enhances its character.

 

6. PRODUCT AND LIABILITY INFORMATION

Reno Source provides quality zellige tiles and this installation guidance as a resource only. Responsibility for installation methods, material selection, and workmanship rests with the installer and homeowner. By proceeding with installation, you acknowledge that you understand the unique characteristics and requirements of zellige tile.

Reno Source

Finish Materials

Based in the USA

www.therenosource.com

help@therenosource.com