By Jim Percival, technical director at Palace Chemicals
For tile fixers, interpreting and following the relevant British and European Standards is key to delivering a durable, high-quality installation, reducing the risk of costly failures and providing a clear benchmark of excellence if workmanship is ever challenged.
The most important one in our industry is the BS 5385 series, which is the main British Standard covering the design and installation of wall and floor tiling. In its various parts, this Standard covers different applications:
BS 5385-1 Design and installation of ceramic, natural stone and mosaic wall tiling in normal internal conditions. This covers Internal wall tiling, including selection and preparation of backgrounds, fixing methods, adhesives, grouting and movement joints
BS 5385-2 Covers the design and installation of external ceramic, natural stone and mosaic wall tiling in normal conditions. Provides guidance to achieve best practice fixing of external wall tiling in normal UK climatic conditions, covering all suitable backgrounds, materials and fixing methods.
BS 5385-3:2024 The most recently reviewed and updated edition of the Standard covers the design and installation of internal and external ceramic and mosaic, natural stone and terrazzo flooring. It also includes internal agglomerated stone flooring in normal conditions, including the design, laying and maintenance of large format tiled floors, both indoors and outdoors. Agglomerated/engineered stone flooring is covered for internal use.
BS 5385-4 Addresses tiling in specific conditions, including areas exposed to demanding environmental or functional requirements, including the installation of ceramic and mosaic tiling in wet, fully immersed and high humidity environments subject to wide variances in temperature and climatic exposure.
Note that BS 5385 Part 3 additionally includes recommendations on matters such as background preparation, tile selection, fixing methods, movement joints and installation practices and was most recently revised in 2024, to incorporate guidance which was previously included in Part 5.
Importantly this 2024 revision also strengthened the guidance concerning tiling on to plywood and other wood-based boards, highlighting the need for a suitable intermediate layer (backer-board or de-coupling membrane) and encouraging the move away from direct fixing to timber based substrates.
There are also standards covering the products themselves. BS EN 14411 establishes the performance requirements and classifications for porcelain and ceramic tiles. BS EN 12004 covers the many different performance levels applicable to both cement, dispersion polymer and 2-part epoxy-based tile adhesives, while BS EN 13888 covers cement and epoxy-based tile grouts.
There is a standard relating to waterproofing and protecting water sensitive substrates. BS EN 14891 covers liquid-applied waterproofing products used beneath adhesive-fixed ceramic tiling. Where wet rooms, showers or other moisture-sensitive areas are involved, the complete system must be suitable for the intended use; grout alone should never be treated as a substitute for waterproofing.
Recent innovations in waterproofing systems have seen the industry increasingly move towards European standards such as EAD 030352-00-0503, which increases the scope of testing and level of performance that products in this category are expected to attain. In addition to these major standards, other guidance is available, such as BS 8000-9, which relates to screeds and BS 8000-16 for sealing joints in buildings. Substrate conditions, moisture levels, structural movement, underfloor heating and the suitability of adhesives all need careful consideration before fixing begins.
It is worth bearing in mind that standards do not of themselves have legal force, but they are widely recognised as setting the benchmarks for good practice and can carry significant weight in dispute resolution. Tile fixers should be aware of which Standards apply, check for revisions, follow product instructions and carry out the necessary surface preparation work. Getting these fundamentals right protects the finished installation, the customer and the professional reputation of the installer.
Technical director at Palace Chemicals | www.palacechemicals.co.uk
