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Check now some of the most frequent questions and answers about our products and see whether your doubt is included here. In case it is not clarified, get in touch with our Customer Service (SAC).

Thin tiles composed of clays and/or other inorganic raw materials, generally used as floor and wall coverings, usually formed by extrusion (A) or pressing (B) at room temperature, but which can also be formed by other processes (C), subsequently dried and fired at temperatures sufficient to develop the required properties.

The tiles can be glazed (GL) or unglazed (UGL); they are non-combustible and are not affected by light.

StandardWater Absorption (%)Manufacturing Method
  Extruded (A)Pressed (B)
NBR13006Abs < 0.1TECHNICAL PORCELAIN TILETECHNICAL PORCELAIN TILE
 Abs < 0.5GLAZED PORCELAIN TILEGLAZED PORCELAIN TILE
NBR13817Abs < 0.5AlBla
 0.5 < Abs < 3AlBlb

Choose the model that best harmonizes with the environment. It is very important to check whether the chosen ceramic tile model is suitable for the location where it will be installed. If in doubt, consult our Customer Service.

When measuring the area to be tiled, add the baseboard to the calculation and assess the need for special cutouts.

Technical Reserve: make sure that the quantity of product purchased is sufficient. Always purchase 5% extra from the same batch. This reserve is recommended for possible unforeseen events that may occur during the work (replacement of tiles due to falling objects, need for structural repairs, among others).

INDICATION OF PLACE OF USE:

LB – Indoor residential and commercial environments with light traffic.
LC – All residential and commercial environments with medium to high traffic.
LE – All residential and commercial environments with heavy traffic, and outdoor environments.
LF – Internal and external walls and facades.
LR – Interior walls.

Gauge is the separation/size standard for ceramic tiles. During the manufacturing process, inevitable dimensional variations occur, which are provided for in technical standards (NBR 13818 and ISO 13006). To facilitate installation, ceramic tiles are separated into sizes (gauge). This separation is identified on the product packaging. However, if the quantity purchased is insufficient to complete the job, it is necessary to check with the retailer whether the additional batch has the same gauge standard. Otherwise, it is essential that this separation be carried out on site.

ALWAYS CHECK THAT THE MATERIAL PURCHASED HAS THE SAME GAUGE STANDARD

Even rectified products may have slight variations in size, so it is essential that the minimum laying joint indicated for each type of product is respected.

The identification of the shade of ceramic tiles is used to separate small variations in color between productions or within the same production period. This variation is inherent in the manufacturing process of ceramic tiles and occurs when the materials used undergo firing process.
The shade separation of ceramic tiles is identified on the product packaging. However, if the quantity purchased is insufficient to complete the job, it is necessary to check with the retailer whether the additional batch has the same shade pattern. Otherwise, it is essential that this separation be carried out on site.

ALWAYS CHECK THAT THE MATERIAL PURCHASED HAS THE SAME SHADE PATTERN

Ceramic tiles are inert to the action of light, even ultraviolet rays do not cause color loss or fading on the surface of the ceramic material.

Use good quality adhesive mortar to lay ceramic tiles, following the mortar manufacturer’s recommendations for the type of product and environment. Some usage recommendations are shown below:

CERAMIC TILING X ADHESIVE MORTAR
BRANDENVIRONMENTMORTAR TYPE
Lef CerâmicaIndoor environmentsAC I
Lef CerâmicaOutdoor environmentsAC II
ViaRosa Porcelain TileIndoor environmentsAC III or Porcelain Tile
ViaRosa Porcelain TileOutdoor environmentsAC III or Porcelain Tile
ViaRosa Porcelain TileLarge formats, indoor or outdoor environmentsAC III-E Large formats
ViaRosa MonoporosaIndoor environmentsAC I

ATTENTION: For special installations such as facades, flooring over flooring, fireplaces, barbecues, swimming pools, among others, it is necessary to use special mortar suitable for this application.

When receiving the product at the construction site, check the following items:

The reference delivered is the same as the model purchased;
All boxes have the same SIZE and SHADE information;
The delivered material is in good condition.
Store the boxes upright, stacked no more than 3 rows high, in a flat, covered location;
Be careful when handling the product on site, as the glazed surface of the ceramic tile is vitrified and major impacts can damage the product (surface scratches, chipped edges, etc.).

The installation of the tiles should be one of the last activities on site. Avoid walking on the newly laid floor and protect the tiles from construction debris (sand, rubble, etc.).

The laying of ceramic tiles must comply with the regulatory recommendations of ABNT NBR 13753 – Internal or external floor covering, ABNT NBR 13754 – Internal wall covering and ABNT NBR 13755 – External wall and facade coverings.

When laying ceramic tiles, use good quality adhesive mortar, following the mortar manufacturer’s recommendations for the type of product and environment.

To ensure even distribution and reduce the need for cutting, we recommend simulating the layout of the environment before laying.

Respect the curing times for installing ceramic tiles, 28 days for the concrete base to cure or 14 days for the subfloor to cure, grout the coverings only 3 days after laying, using wide wooden planks to walk on the floor.

Use the minimum joints recommended by the manufacturer.

Immediately after laying, remove excess mortar between the tiles with a soft wooden or plastic rod with a rounded, smooth tip, facilitating grouting and avoiding damage to the edges of the ceramic tile after the mortar has cured.

After laying, check for any tiles that sound hollow, which should be removed and re-laid or replaced.

HIRE QUALIFIED LABOR

Laying joints are regular spaces between two adjacent ceramic tiles. Joints are necessary for the following functions:

a) To compensate for variations in the thickness of the ceramic tiles, facilitating alignment;
b) To meet aesthetic requirements, harmonizing the size of the tiles and the dimensions of the area to be covered with the width of the joints between the ceramic tiles;
c) To offer relative power to accommodate the movements of the base and ceramic tiles;
d) Facilitate perfect filling, ensuring complete sealing of the joint;
e) Facilitate the replacement of ceramic tiles.
After grouting, check for cracks or flaws to avoid infiltration problems. Use waterproof and mold-resistant grout.

FOR COATINGS WITH RUSTIC, ROUGH, OR EMBOSSED TEXTURE, APPLY A COAT OF COLORLESS FLOOR WAX BEFORE GROUTING. THE WAX WILL MAKE IT EASIER TO REMOVE EXCESS GROUT.

BRAND FORMAT (cm) MINIMUM JOINT (mm)
Rox – Non-Rectified Ceramic 33X59 / 44X44 / 57X57 5
Rox – Rectified Ceramic 32X57.5 / 56×56 2
Rox – Large Format Rectified Ceramic Tile 25×110 / 51X110 2
Rox – Rectified Monoporosa 31X58 2
Rox – Rectified Porcelain Tile 72X72 / 71×71 2.0

If you have any questions, do not install the product before contacting Customer Service from 8:00 a.m. to 5:00 p.m., Monday through Friday.

For a harmonious distribution, lay out a few pieces taken at random from different packages to check the layout of the environment.

It is absolutely necessary to prepare the subfloor very well. This will prevent problems arising from moisture, such as efflorescence and stains on the ceramic tile. Ceramic tiles must be laid dry on adhesive mortar. If the ceramic tile has excess dust on its base, it must be removed.

Use adhesive mortar when laying tiles on both floors and walls, always following the manufacturer’s instructions. Application should be done with a notched trowel. Check that the adhesive mortar meets ABNT regulatory specifications.

Installation without joints may cause the product to detach. The joints must ensure complete sealing of the ceramic tiles in accordance with ABNT regulatory specifications. ABNT.

Do not strike the tiles with metal tools to avoid breakage, chipping, or other damage to the tiles. For ceramic tiles with a rustic and rough texture, we recommend applying a layer of colorless wax to the pieces before grouting.

For perfect cuts, use a special cutter and all appropriate tools.

Make sure there are no “hollow” sounds in the tiles. If there are, they should be removed and laid again.

Grouting should only be done 72 hours after laying. Clean immediately with a soft sponge moistened with clean water, using waterproof and anti-mold grout.

After laying, the ceramic tile must be protected until the end of the work against splashes of paint, oil, solvents, mortar, or any abrasive materials. Equipment should not be dragged directly across the ceramic tiles. Exposure to foot traffic should preferably occur seven days after grouting.
Glossy products are more susceptible to scratches, regardless of their abrasion class. If installed as flooring, ceramic tiles should be protected by providing shoe cleaning devices (such as doormats) in areas with heavy traffic (access points and main walkways), protected with felt in case furniture is dragged, among other necessary protections according to usage.

After laying, the ceramic tile must be protected until the end of the work against splashes of paint, oil, solvents, mortar, or any abrasive materials. Equipment should not be dragged directly across the ceramic tiles. Exposure to foot traffic should preferably occur seven days after grouting.
Glossy products are more susceptible to scratches, regardless of their abrasion class. If installed as flooring, ceramic tiles should be protected by providing shoe cleaning devices (such as doormats) in areas with heavy traffic (access points and main walkways), protected with felt in case furniture is dragged, among other necessary protections according to usage.

To clean ceramic tiles, we recommend using only water, soap, or neutral detergent. If necessary, use the products listed below:

STAINING AGENTS VS. CLEANING AGENTS
TYPE OF STAINCLEANINGEXAMPLE
Cement and lime residueOrganic acids diluted in water or 10% diluted muriatic acidVinegar
RustBleach and soap powder or 10% diluted hydrochloric acid 
Cooking oilsEthyl alcohol 
FatsDetergent or baking soda and water 
PaintsSpecific solventThinner / Varsol
Protective resinAlkaline detergent in hot waterPowdered soap
Beverages (coffee, juice, beer, wine, etc.)Alkaline detergent in hot water or hydrogen peroxide or acetone or benzineWashing powder
Grease and oilsAlkaline detergent in hot waterWashing powder
Tire rubberOrganic solvent or soap powderTurpentine
GraphiteSchool eraser 
Crayon marksAlkaline detergent in hot waterWashing powder
BloodHydrogen peroxide 

WARNING: When using acids for cleaning, moisten the ceramic tiles before applying the diluted solution.

LEF GROUP guarantees its “A” quality products under the following conditions:

  • APPARENT DEFECTS: These are defects that are visible before installation. Complaints will only be accepted before installation, as determined by ISO 13006 and ISO 10545-2;
  • LATENT DEFECTS: These are defects that appear after some time of use. For latent defects, complaints are directly related to the time of use. Each case will be analyzed, taking into account whether they were specified and installed correctly and whether they were used under normal conditions.

Observations:

  • At least 95% of the parts have no visible defects at a distance of 1 meter;
  • WEIGHTS, COLORS, AND MEASUREMENTS ARE SUBJECT TO INEVITABLE VARIATIONS, WHICH ARE TYPICAL OF THE PRODUCTION PROCESS;
  • ONLY “A” QUALITY PRODUCTS ARE GUARANTEED.

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