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Construction Law/calculate unit price


QUESTION: I am contacting you to inquire about this case:

In project there is an item of paving a school yard with an area of 1000M.S with thickness of ( 5cm)  in Bill of Quantity of the contract with Unit price of this item  .
But in the drawings of this project shows thickness of the Asphalt is 7 cm  .
The Question is , in Red book of Fidic/1999
The contractor shall implementation the Asphalt thickness as Bill of Quantity or As Drawings ? and what is the unit price of the item in this case

Dear Shadi,

Thank you for this question.

Based upon the information provided the asphalt should be laid at 7cm thickness in accordance with the drawings but it is necessary to agree a new rate, which will be based upon the existing BoQ item rate adjusted for the increased quantity of material to be used and also for any change in the rate of laying/time and resources required for completion of the operation

I hope that this assists you.

Kind regards,
John Dowse

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John Dowse


Legal; contract interpretation; quantum; delay analysis. Practitioner in arbitration, adjudication and mediation.


Thirty-three (33) years experience in building and construction, at all levels both within contracting and consulting organisations. Practising arbitrator, adjudicator, and mediator. Faculty approved trainer for the Chartered Institute of Arbitrators. Lecturer on construction contract forms and dispute resolution practices.

Chartered Institution of Civil Engineering Surveyors Chartered Institute of Arbitrators Institute of Directors Society of Construction Arbitrators

Various UK and International construction and legal publications.

LLB (Hons), Pg Dip (Legal Practice), MCInstCES MCIArb MIOD Barrister

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