As principal contractors, we offer a totally comprehensive range of services from thermography to moisture surveys.
Condition, Report & Specification Writing
We provide full and detailed reports to support architects and restoration specialists through planning applications, adhering to all English Heritage principles. These include condition survey reports, stone identification & sourcing, specification writing on cleaning and restoration, pre-tender packages, stone and mortar testing, restoration and cleaning options and project management.
Specialist Cleaning & Poultice Analysis
We undertake specialist cleaning using methods specifically applicable to the nature of the stonework being restored i.e., DOFF/Thermatech, JOS/Vortech, nebulous and poultice cleaning. Surface soiling may not necessarily occur in a uniform manner across the entire surface of a building, so a poultice analysis is performed which determines the concentration levels and application time of cleaning methods to be used on each area of the stonework.
Petrographic Analysis
A petrographic analysis is an in-depth investigation of the chemical and physical features of a particular rock sample. A complete analysis will include both macroscopic and microscopic investigations of the sample, in which the mineral content and the textural relationships within the rock are described in detail. The classification of rocks is based on the information acquired during the petrographic analysis.
Sampling
In collaboration with our suppliers, we source stone, marble and granite from various quarries around the UK and Europe. This allows us to ensure each project uses the correct materials to ensure the restoration, repair and conservation of the building is undertaken to the highest standard and are bespoke in their own right.
Paint Analysis
To ensure restoration is carried out to the original standard, we undertake historic paint analysis, which examines paints, metallic finishes and both clear and translucent finishes used on building facades. This analysis determines the colour of the finish used during the original construction and informs our choice of ingredients for the media (water, oil, latex) and pigments (organic pigments, inorganic pigments, dyes) used in the restoration process.
Metal Detection
Metal has historically been used to tie, reinforce and support the fabric of buildings, varying between heritage structures from small pins and cramps to large structural elements. Corrosion of this embedded metal can therefore contribute significantly to structural deterioration. We undertake non-destructive surveys to identify the subsurface presence of metalwork so that necessary restoration can be identified.
Photogrammetry & Mapping Conditions
Photogrammetry is the process of obtaining information about physical objects through the process of recording, measuring and interpreting photographic images. This enables us to generate accurate 3D data, with exact positions of surface points and precise drawings for surveys of historic buildings and monuments.
Moisture Surveys
The majority of masonry-related issues in a heritage building occur as a result of moisture infiltration. This can be caused by a variety of sources and can result in structural failure if left unchecked. We undertake full moisture examinations to identify areas of damp and voids, which could pose thermal jacking or other moisture-related structural issues.
Thermography
We undertake thermography using infrared and thermal imaging cameras. This gives us an understanding of the thermal condition of a building and allows us to visualise areas of varying temperature, which we are unable to see with the naked eye. This enables the identification of thermal insulation issues, heat leaks and other factors which may impact the condition of the stonework.