Page 120 - Catalogo Tejas Borja 2016 Ingles x

CRAQUELURE (superficial cracking)

Superficial microcracking can appear on some tiles with the application of enamels, producing only an aesthetic

effect and not the structure of the tiles. As a result, such microcracking is not considered a defect under EN 1304.

EFFLORESCENCE

Some tiles can have a thin white film on them that becomes apparent shortly after installation. This can have a var-

ying effect on the normal colour of the surface. In most cases, this efflorescence is temporary and due to soluble

salts and impurities found in water, cement and aggregates in mortar, which will gradually disappear from the sur-
face with precipitation and will not affect the functional characteristics of the tiles showing signs of efflorescence.

However, the weather will produce slight changes in tone over time.

ROOF MAINTENANCE

The accumulation of micro-organisms, moss, plants and other detritus on tiles, valley beams and gutters can

hinder the movement of rainwater and the drying of roof tiles. This can pose a problem and cause leaks.

Roof tiles are made from a natural material. As a result, they must not be treated with any product that could alter

their reaction to adverse weather conditions.

It is recommended that tiling and all of its parts, ceramics, insulation, evacuation channels, joints and support

structure be inspected on a periodical basis. Whenever necessary, damaged elements must be repaired or

replaced. All ceramic parts and evacuation channels must be cleared of any detritus and moss that has ac-
cumulated, so that drainage systems are not obstructed. Under the TBC (Technical Building Code), periodical

inspections must be carried out every 1 to 3 years, depending on the component.

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