FIDIC / Legal Reference: FIDIC Red Book Clause 4.12
Adverse physical conditions or artificial obstructions encountered during construction that an experienced contractor would not have anticipated at the time of tender. Under FIDIC Clause 4.12, the contractor is entitled to an extension of time and additional cost — provided it gives prompt notice.
What it means in practice
Clause 4.12 covers both natural physical conditions (such as ground, hydrology, and sub-surface conditions) and artificial obstructions (such as underground services, abandoned structures, and contaminated land). The contractor must give notice as soon as it encounters conditions that are unforeseeable.
The Engineer inspects the conditions and makes a determination of whether they are unforeseeable. If so, the contractor is entitled to an EOT for programme delays and additional cost — including the cost of taking the measures described in the notice.
Where disputes arise
Physical conditions claims are some of the most technically complex in construction law. They require expert geotechnical evidence, programme evidence on impact, and cost evidence on the additional expenditure incurred.
UAE Context
UAE construction projects — particularly in Dubai’s coastal reclamation areas, Abu Dhabi’s island developments, and areas with historic industrial activity — regularly encounter unforeseeable ground conditions. Sabkha, contaminated fill, and abandoned utilities are all examples of UAE Clause 4.12 claims.
Related terms
Physical conditions claims require specialised geotechnical and contractual expertise. e-Basel provides expert witness and claims advisory services for UAE ground condition disputes.
Construction Claims Consultant UAE →Search terms: physical conditions claim FIDIC UAE · clause 4.12 FIDIC · ground condition claim UAE · unforeseeable conditions construction · physical conditions contractor entitlement
