Tile Dimensions and Coverage Ratios

The document details various tile sizes along with their coverage percentages per square meter, indicating the proportion each tile size contributes in mixed-format layouts. Examples include 24.8x99.8 cm, 16.4x99.8 cm, and 9.7x59.5 cm tiles covering 100% per square meter, while larger tiles like 29.6x59.5 cm, 60x60 cm, and 30x60 cm have coverage ratios ranging from 33% to 75% depending on the series.

Laying Proposals and Tile Combinations

Recommended tile size combinations are provided to achieve balanced and aesthetically pleasing surfaces. Notable combinations include:

• 75x75 cm at 60% with 60x60 cm at 40%
• 90x90 cm at 70% with 60x60 cm at 30%
• 44.5x90 cm and 22x90 cm each at 50%
• 75x150 cm at 67% with 37.5x150 cm at 33%

Recommended Joint Width and Installation Guidelines

The standard grout joint width is 2 mm for rectified tile modules. For natural porcelain stoneware tiles, a wider grout joint of 3-4 mm is recommended due to slight dimensional variations. Installation without grout joints (butt joint) is strongly discouraged. Instead, a staggered laying pattern with tiles offset by 10-20% is advised to improve visual appeal and accommodate size differences.

Surface Planning and Technical Considerations

Effective surface planning must account for:

• Installation type and method
• Grout joint dimensions
• Expansion and perimeter joints
• Technical requirements and intended space use
• Grout color choice, noting that contrasting grout colors may increase cleaning difficulty compared to tone-on-tone options

Natural porcelain stoneware tiles have minor size irregularities, necessitating grout joints to ensure proper installation and aesthetics.

Installation Procedures and Best Practices

• Prior to full installation, lay out 2-3 square meters of tiles from multiple boxes to evaluate color variation and overall effect.
• Avoid pre-soaking tiles or marking them with pencils or markers.
• Inspect tiles for visible defects (quality, tone, chips, unevenness) and report any issues to the client and designer before installation, as claims post-installation are not accepted.
• Installation should ideally commence in the presence of the client and designer.
• Maintain a clean work area free from cement, sand, mortar, or other staining materials.
• Protect tiles from damage or contamination caused by other tradespeople during installation.

Inspection and Quality Control

• Final inspection should be performed visually from approximately 1 meter distance under normal lighting conditions, using corrective lenses if needed.
• Minor imperfections visible only under oblique lighting or magnification are not considered defects.
• Defects are defined as visible issues under normal viewing conditions.
• Claims for defects visible before installation will not be accepted after installation.
• The supplier’s responsibility is limited to material quality, not the finished installation quality.
• It is recommended to retain spare tiles after installation for future repairs or as reference samples in case of disputes.

Tile Installation Guidelines and Quality Control

Site Assessment and Planning

Installation planning must consider mechanical, temperature, physical, and chemical stresses, room size, surface slopes, tile type, installation method, joint sizes, expansion joints, and perimeter expansions.

Tile Selection Considerations

Tile selection should evaluate technical requirements, available formats, intended use, and grout color. Bright or contrasting grout colors may complicate cleaning. Natural porcelain stoneware tiles require installation gaps of 2 mm for rectified tiles and 3-4 mm for natural tiles. Seamless installation is discouraged; a deck-style layout with 10-20% offset is recommended.

Installation Procedures

Before installation, lay out 2-3 square meters of tiles from multiple boxes to assess color harmony. Tiles should not be soaked or marked. Installers must report visible defects to client and designer and obtain approval before proceeding. Installation should ideally start with client and designer present. Tiles must be kept clean and protected from contamination or damage by other trades during and after installation.

Inspection and Quality Control

Final inspection involves unaided visual examination from about 1 meter. Defects visible only under bright light, close inspection, or magnification are not considered defects. Claims for visible defects before installation are not accepted post-installation. Supplier responsibility covers material quality only, not installation quality. Retaining spare tiles is essential for repairs or dispute resolution.

Critical Recommendations Summary

• Use 2 mm grout joints for rectified tiles and 3-4 mm for natural porcelain stoneware.
• Avoid butt joint installation; prefer staggered laying with 10-20% offset.
• Mix tiles from different boxes to ensure uniform color distribution.
• Inspect and document tile defects before installation.
• Maintain a clean, protected installation site.
• Conduct visual inspection post-installation under normal lighting.
• Keep spare tiles for future repairs and dispute handling.

Multilingual Accessibility

The document is provided in multiple languages including Italian, English, French, German, Spanish, and Russian to ensure accessibility for international users.