Portland Stone Internal

Portland Stone has a long history of use in internal situations. Its physical strength, its carving ability and lightness in colour have encouraged its use in domestic, commercial and institutional buildings as flooring, wall linings, stairs and fireplaces.

Portland Stone Flooring

The use of Portland Stone for internals has been sub-divided into three sections:

Flooring

Wall Linings

Decorative Stonework

Selecting the Stone

The Stone Federation has produced a document explaining the processes that should be considered when selecting a stone, 'Selecting the Correct Stone'. 

If you'd like to request a copy please email the Stone Federation at enquiries@stonefed.org.uk or email us directly at enquires@albionstone.com


Samples

The initial selection of the stone is normally made after viewing an Indicative Sample.

These are small samples that show the typical colour and texture, but cannot show the natural variations that are present in all stones.

The stone selection should always be confirmed with an inspection of buildings (case studies) built using the same stone and a visit to the quarry and mine to view the natural faces and Quarry Range Panels.


Inspection of Past Projects

Albion Stone can provide a list of case studies showing projects using the same stone and application.

Please note that some of the projects may be private houses where access can be a problem but we can normally direct you to some public buildings. When visiting the site, it is important to view the stonework as an entirety as well as looking at the individual geological features that give the stones their unique character.

Inspection of the Mine

Most project teams will arrange at least one visit to the Mine at Portland, Dorset. 

The visit provides an opportunity to examine the Mine face and the stock and to familiarise yourself with the geological variations from bed to bed. Albion Stone has produced large Range Panels that show the natural geological variation of each stone.

Albion Stone produces a quarterly 'Mine Report' which provides information on the availability, geology and sizes of the blocks in stock. Although long stones are available, it is advisable to check that the size of the typical stones on the project are readily available from the chosen blocks.

It is important to provide information on the quantity of stone required and the programme for the project so that the availability of particular stones can be established. The potential and merits of a block pre-purchase can also be examined.

Technical Data Sheets

The stones' physical properties need to be considered as part of the stone selection procedure. 

Albion Stone has Technical Data Sheets for the various beds in the quarries and mine.  The figures on these sheets have been prepared using the methods set out in the harmonised European Testing Standards into the highest expected values (HEV), the lowest expected value (LEV) and the average. Due to the large number of tests, these figures provide the design team with a high level of confidence.


CE Certificates and Declarations of Performance

The figures from the Technical Data Sheets have been used to CE mark Albion Stone's products.

The CE marking of all natural stone became a legal requirement in July 2013, but Albion Stone have been CE marking all their stones since 2008. CE marking provides a legal confirmation to the client that the product is suitable to be placed on the market.

Please contact us on enquiries@albionstone.com to request our CE Certificates and Declarations of performances. 

 

The European Standard BS EN 12058 requires that all stones comply with a regime of Initial Testing and Factory Control Testing. Although results from a number of different tests will help to build a picture of the physical properties of the stone, it is normally only certain tests that determine the suitability of a particular stone in a particular application.

  • Flooring-Abrasive Resistance, Slip Resistance
  • Wall Linings-Flexural Strength
  • Cantilever Staircases-Flexural Strength

Inspection of the Range Panels

To assist the selection of the most appropriate bed, Albion Stone has produced large Range Panels. 

These panels show the natural geological variation in the different beds of stone and shall not become a reason for rejection unless their concentration becomes excessive and the typical character of the stone is lost. As stated in BSEN 1469 'The reference sample does not imply strict uniformity between the sample itself and the actual supply; natural variations may always occur'.

Quality

Albion's Portland Stone bears the BSI ISO 9001 certification kitemark. 

This is your assurance that samples are regularly subjected to rigorous, independent testing to ensure that they comply with stringent standards for safety, product performance, or reliability. In addition, this also means that the quality systems of the factory where this Portland Stone is manufactured are systematically assessed.

The certification is therefore Albion Stone's commitment towards maintaining the highest possible standards.

Please request our certificate of registration via contacting us on enquiries@albionstone.com

British/European Standards

We recommend that the following standards are read in conjunction with this Technical Manual:

  • BS EN 12057: 2015 Natural stone products-Modular tiles - Requirements
  • BS EN 12058: 2015 Natural Stone Products-Slabs for floors and stairs - Requirements
  • BS 8000 Section 11.2: 1990
  • BS 5385: Wall and floor tiling  Part 1:1995 Code of practice for the design and installation of internal ceramic and natural stone wall tiling and mosaics in normal conditions
  • BS 5385: Wall and floor tiling Part 5:1994 Code of practice for the design and installation of terrazzo tile and slab, natural stone and composite block flooring.
  • BS 8298: 2010 - Part 5 - Internal Wall Linings
  • BS 8204:2009 Part 1 Screeds, bases and in situ floorings -Part 1: Concrete bases  and cement sand levelling screeds to receive floorings -Code  of practice  
  • Selecting the Correct Stone by the Stone Federation - please click here to view.
  • Stone Federation - Flooring code
  • Stone Federation - Wet Rooms code

Specification Clause