Why investigation comes first
Two buildings with identical cracks can have completely different causes. Without investigation it is impossible to say whether restoration is needed, how urgent it is and which method fits.
What an investigation usually includes
The exact scope varies by building and firm. In the Netherlands, the F3O guideline for investigating and assessing timber pile foundations is often referenced. Typical components:
- Archive research into drawings, earlier repairs and the foundation type
- Visual survey of cracks, tilt and deformation
- Level measurements to determine differential settlement
- One or more inspection pits down to the pile heads
- Wood samples for laboratory analysis of decay
- Groundwater level relative to the pile heads
- A report with assessment and advice on next steps
What happens with the outcome?
A report describes the foundation's condition and often advises a timeframe for recommended restoration. Sometimes monitoring is enough; sometimes restoration is needed. An engineer can then develop a restoration plan and a contractor can prepare a targeted quote.
Already have a report? Include it with your enquiry. We read it, but do not assess or replace the investigator's judgement.
Together with neighbours or the owners' association
In Amsterdam blocks, buildings are often structurally connected. A joint investigation, and later possibly joint restoration, can have practical and cost advantages. Information on a joint approach is available from the KCAF (Dutch knowledge centre for foundation problems) and the municipality.
Our role
We first map the situation with a visual inspection of visible damage, crack patterns and tilt, and advise on further investigation. Where investigation of the foundation itself and a structural judgement are needed, we work with an independent engineer or investigation firm, and the restoration follows their report and plan.
No remote diagnosis
This information is general and does not replace investigation or advice from a qualified expert. Cost and duration of investigations vary by building and firm.