How to read a marble technical report

A marble technical report describes the properties of the tested specimens as measured under particular conditions. To read it, look not only at the results column but also at the material identity, the test method, the units, the scope of the specimens and the test conditions. The existence of a report does not mean the stone is automatically suitable for every application.

Which material does the document belong to?

First find the report number, the laboratory, the date and the description of the specimens. The relationship between the trade name and the lot to be shipped should be explained. Do not treat a document belonging to a different source or specimen as the same just because the stone's name is similar. When no link to the lot in question can be established, ask the supplier. Do not assume a relationship that is not in the document.

Which property was measured, and by which method?

Water absorption, compressive strength and flexural strength are different properties. One looking good does not show that the others were measured. The Natural Stone Institute's testing services also list these tests under separate headings: natural stone testing (opens in a new tab). Record the name of the method, the version of the standard if there is one, and the test conditions as the report gives them.

Why do units and specimen details matter?

When comparing two results, check that they refer to the same units, method and conditions. Results from different methods should not be compared directly just because their headings look alike. If there is an average, look at how many specimens it was calculated from and, where the report gives them, at the spread and the individual results. Do not fill in missing information with guesses.

See the step between a result and a project decision

The value in the report is compared with the scope the project specification requires. That interpretation depends on where the stone is used, the system designed and the relevant rules. Vertical cladding and a wet floor, for example, do not have the same priorities. Instead of an adjective such as “high strength”, explain which test answers which question about the project. Do not produce a pass or fail that the technical team has not confirmed.

Look for finish information in slip data

The finish and the test conditions matter in interpreting a slip result. Ask whether the product you chose and the test specimen represent the same scope. Do not turn a value that does not fit the use scenario into a general claim of safety. A photograph does not prove a stone's slip or strength performance.

When reviewing Mabella's technical documents, assess the report page, the result in question and the material identity together. Because no verified Mabella laboratory report is used in this article, no numerical results for the brand are given. The final technical choice should be completed with the relevant document and the project team's assessment.