Further details on various aspects of our services are listed below: -
- Historic buildings dating
- Live tree, veteran tree, or woodland analysis
- Churchyard yew tree dating analysis
- Professional reports
- Dendrochronological research
Historic buildings dating
Our call out service begins with a survey to identify potential timbers and, where agreed to proceed, includes the specialist drilling of 12mm cores from the timbers for analysis.
Sampling usually takes between 3-4 hours, the analysis and results then normally take 6-8 weeks (although this wait can sometimes be fast-tracked at an additional cost). Dendrochronology results are presented either as PDF files or printed full colour written reports, which generally include a floor plan and photographic record of sample locations.
Building dates are normally also published in Vernacular Architecture. Tree-ring analysis of a building from £680.
The removal of cores does not affect the structural integrity of timbers, but if desired for cosmetic reasons, plugging and restoration of core holes is charged at an additional cost of £5.00 per core hole.
No payment (except the assessment/call-out fee) is required for any number of samples taken on-site and you are only subsequently invoiced for samples actually dated. This means that in the unfortunate event that samples cannot be dated you will incur no further charge.
The English Heritage guidelines document on dendrochronology states that "Where possible, at least eight to ten timbers should be sampled per building or, for more complex buildings per phase". To maximise the potential of dating a building phase we preferentially take 10 samples.
Live tree, veteran tree, or woodland analysis
Churchyard yew tree dating analysis
The full colour illustrated reports explain the methods and results, and includes interpretation, discussion, a floorplan and photographic record of sampling locations. Reports are charged at £10 per copy. (click here for an example of one of our reports). Photographs, where supplied with posted samples are incorporated into the report to help identify timbers and location. Photographs of specific objects for dating provide an extremely useful means of identification and are normally incorporated into the certificate of dendrochronological provenance.
Timbers that have sufficient rings to be dated using tree-ring analysis may nevertheless be impossible to date. Pollarding and other human disturbances can sometimes make timbers impossible to date by tree-ring analysis. Weaknesses in currently available reference chronologies may also make it difficult to date timbers from some areas at the present. Tree-ring dating continues to develop as a science and all samples which cannot be dated (at the present time) will be held by us and periodically reviewed in the hope that they will date in the future.
Unless prior to sampling a client specifically requests otherwise, Tree-Ring Services policy is to make its reports available to further research and to publish building dating results in Vernacular Architecture. To obtain copies of the journal Vernacular Architecture please contact: the Publications Officer, 16 Trefor Road, Aberystwyth, Dyfed, SY23 2EH.
The availability of reference data is crucial to tree-ring dating and the pioneer work of dendrochronologists, who make their reference chronologies availably for use in dating is gratefully acknowledged. Tree-Ring Services policy is to publish raw data in its reports to help the furtherment of the science. Each report on dendrochronological analysis, contains a section on methodology, results, interpretation and conclusions. Reports also generally contain figures, building descriptions and floor plans.