In a renovation in a block of flats, the biggest practical risk is not just a missing sample but unclear details: which flat, which room and which material the result comes from. When there are several units, consistent sample names save mistakes and needless extra visits.
Agree on sample names before sampling
Use the same structure on every bag and in every order, for example "Flat 12 / bathroom / wall tile with the layers underneath". If there are several buildings or stairwells, add the building and the entrance as well.
Keep the result and its scope apart
The result in the report applies to the sample that was sent. For the decisions in the project, you therefore need to know whether the sample represents one flat, one particular batch of material or a larger structure of the same kind. That must not depend on someone remembering after the fact.
Keep the decisions in one place
Store the sample's name, photo, sampling location and report together in the project documentation. Also note which work stage the result applies to and who decided how the work continues. Then the contractor, the property manager and the client are all looking at the same information.
When is a new sample needed?
A new sample is appropriate if the material looks different in another flat, if the renovation history is different, or if the spot of the original sample does not match the new demolition spot. Flats sharing the same street address does not make their materials the same.
Clear naming turns the laboratory result into useful project information. At the same time, it reduces the risk of a correct result being matched to the wrong flat or the wrong layer of material.