Decorative Stonework

There are a number of applications for decorative internal Portland Stonework including fire surrounds, cantilever staircases or solid stairs, stone tables etc.

Structure

The designer should ensure that any supporting structure is designed to carry the weight of the stone, which should be based on 2,500kg per cubic metre. 

Cantilever staircases are difficult structures to assess and the services of a specialist stone masonry designer with experience of previous cantilever staircases are required.

Design

The Quarry Report will provide the current information about the typical and maximum sizes of the various different stones. 

The designer needs to ensure that the stone sizes selected for the project are available in the quantities required and that the individual stones are capable of supporting their own weight during the manufacturing process, the transportation and the fixing.  

Installation

It is strongly recommended that an experienced Stone Masonry company is appointed early in the project programme to assist with the planning of the project.

It is important for the designer to be aware of the lifting requirement of any large stones. Any joints should be 5mm +-1.5mm, or wider for longer stones. The mortar should be a white cement/Portland stone Dust mix and weaker than the stone.

Construction Maintenance

All products leaving our works are packed in a manner to ensure safe delivery to site.

This entails protection by CFC free polystyrene strips, shrink-wrapping and delivery on suitably sized pallets, frames or crates. These normally contain a maximum of 1 tonne for safe handling on site. It should be noted that it is the customer's responsibility to ensure safe unloading of delivery vehicles.


Storage and Handling

A suitable storage area will need to be set aside for the stone, which should be stored on firm, level surfaces and, to avoid contamination, should be sited away from wet or muddy areas.

Storage should be as near as practical to the areas of working in order to minimise handling, damage and waste. Pallets should not be stacked on top of each other. Should it be necessary to store the material on site for any length of time, it should be protected from the elements and the environment.

The designer will need to be aware of the manual handling regulations and ensure appropriate lifting equipment is available to move and fix the heavy stones.

Regular Maintenance

Sealing or impregnating the stone is an option if the stones are located in an area that is possibly subject to staining.

However in most situations we would recommend leaving the stone to develop a natural patina on the surface.  

In most internal situations, cleaning with a damp cloth will remove any surface grime. Any spillages that could potentially stain should be treated promptly with clean water. Bleach, household soaps and detergents should not be used on Portland Stone.