If a subcontractor is falling behind through its own inefficiency, can the contractor bring extra labour onto site to supplement it?

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Legal and contractual solutions - Rights and remedies

Where a subcontractor's own delay threatens late completion, may the main contractor put additional labour on site to help finish the works?

Supplementing a subcontractor and the risk of breach

A contractor frustrated by a slow subcontractor may want to put extra labour on the work. Without an express contractual right, doing so is a breach; the safer routes are an express power or termination.

Quick answer

Not without an express contractual right: Sweatfield v Hathaway Roofing held that a contractor which brought outside labour onto the site to carry out part of a subcontractor's work, without a contractual power to do so, committed a breach of contract, so the safer routes are an express power in the subcontract or termination for failing to proceed regularly and diligently

Not without an express contractual right. Sweatfield v Hathaway Roofing held that a contractor which brought a gang from another subcontractor onto the site to carry out part of a subcontractor's work, without a contractual power to do so, committed a breach of contract of great gravity. A contractor that supplements or replaces a subcontractor's labour by self-help therefore risks a claim for breach. The safer routes are to draft an express power into the subcontract allowing extra labour to be brought on if progress falls short, and, where the subcontractor is failing to proceed regularly and diligently, to use the termination right the subcontract usually provides rather than acting unilaterally on site.

The temptationBringing extra labour onto a slow subcontractor's work
Sweatfield v HathawayDoing so without a contractual right is a breach
Express powerDraft a right to supplement labour into the subcontract
TerminationUse the regularly-and-diligently termination right instead
RecordsKeep progress records and note any counter-allegation

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