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Technical advice

Our dedicated team of technical experts are well-versed in the industry, ready to offer you specialised guidance and insights throughout the entire duration of your project tender. We’ve assembled a collection of valuable advice sheets covering various aspects, ranging from design and specifications to installation guidelines. Rest assured, we are here to support you every step of the way.

Design and specification advice

Slip advice (SHOD)

Working rooms and areas are categorised into five assessment groups, determined by the level of slip risk involved. For further insights, please refer to our detailed advice sheet.

Slip advice (Barefoot)

Tile slip resistance is evaluated on an inclined surface with a predefined slope angle, leading to classification within rating groups A, B, and C. For more information, please refer to our comprehensive advice sheet.

Pendulum test

The Pendulum test assesses the dynamic coefficient of friction (CoF), simulating a pedestrian's heel strike – a critical moment when slips are prone to happen. For a more information, please refer to our informative advice sheet.

LRV (Light reflectance values)

Within the realm of architecture, the Light Reflectance Value (LRV) serves as a metric indicating the proportion of visible and functional light that a surface reflects when exposed to illumination from a light source.

PEI ratings

Pei ratings signify the wear-resistance attributes of glazed vitreous and porcelain stoneware tiles, following the standards outlined in EN ISO 10545-7. Read our advice sheet for more info.

Shade variation

Shade variation is inherent in all tile products, including natural stone, porcelain, glass & ceramic. Shade and texture can vary significantly from piece to piece within production runs.

Tile classifications - ISO 13006

ISO 13006 group Bla (UGL)

Water absorption less than 0.5%

ISO 13006 group Blb

Water absorption between 0.5% to 3%

ISO 13006 group Blla

Water absorption between 3% to 6%

Installation advice

Stair nosing

There are five main aspects that specifiers should consider when referring to Stair Nosing. Stair Nosings help create a ‘ladder effect’ to the stairway when viewed from either the top or bottom

Fixing specification

Grestec offer complimentary fixing specification advice for every project senario.

Movement joints

Movement joints should be a minimum of 6mm and positioned as follows:


Raised external terrace system

Raised outdoor floors exploits the conventional system of floating or raised floors. With this laying system, all the pipes and wiring systems are laid beneath the tiled surface and can be inspected at any time. It offers instant accessibility, by allowing the lifting and removal of the slabs.

Grout and adhesives

Fugabella grout and adhesives.

Health and wellbeing

VOC (Volatile Organic Compound)

Ceramic tiles are classified as non VOC emitting products by type, this is universally accepted by all the assessment methods.