Vis major
Vis major or vis majeure, is almost synonymous with force majeure, though the former refers to an act of God from the Latin the latter translates from French a superior force.
Blacks Law Dictionary (11th Edition) refers to vis major as an overwhelming, unpreventable event caused exclusively by forces of nature, such as an earthquake, flood, or tornado. where as force majeure’ is an event or effect that can be neither anticipated nor controlled . . . [that] includes both acts of nature (e.g., floods and hurricanes) and acts of people (e.g., riots, strikes, and wars).
Clauses referring to force majeure are more common than those incorporating vis major but both attempt to set out the circumstances to which the term applies to and prescribe how such situations should be treated. Depending on the provisions of the contract, the following may be considered to constitute vis major :
- Exceptionally adverse weather, Natural Fires.
- Natural catastrophes such as earthquakes, floods and volcanoes.
- Epidemics or pandemics.
the following other events may be considered to constitute force majeure aswell as the above:
- Unforeseen changes to legislation.
- Wars and other hostilities (such as terrorism).
- Fires.
- Civil unrest, such as riots or revolution.
- Strikes (other than by the contractor or subcontractors).
In different contracts, force majeure or indeed vis major may be considered a relevant event, that may allow the contractor to claim an extension of time if, prevented or impeded from performing their obligations under the contract. Although, if the contractor has continued to perform their duties, despite the occurrence, they may not be able to make a claim.
As such vis major maybe considered as a sub event to that of force majeure because the later encompasses a wider breadth of event types. See also the article force majeure.
[edit] Related articles on Designing Buildings
Featured articles and news
We're expanding our collaborative mission by launching DB Intelligence, an exclusive market research advisory panel. Built environment professionals can now get paid to share their expertise on industry trends, products and services.
Panel members receive direct financial incentives for participating in research projects like short surveys, 1-2-1 interviews and focus groups. Register today to shape the future of the construction sector.
Planning condition discharge in England and Wales
A brief exoplanation from a building compliance expert, with further links.
Overheating guidance and tools for building designers
Guidance for dealing with element of building fabric control that have increasing importance.
Shading for housing, a design guide
From the Good Homes Alliance and British Blind and Shutter Association.
UK Standard Skills Classification (SSC)
A shared framework for describing skills needs.
Social media ban consultation comes to close
CIOB urges UK Government to consider social media’s role in careers guidance in ban debate.
The latest of eight Skills England apprenticeship units
The addition of battery manufacturing welcomed by ECA with a warning about the risks of fast-tracked apprenticeship units.
Building Control Independent Panel final report
A precis of a key report led by Dame Hackitt with full recommendations and link to the government response.
Building Safety recap April, 2026
A short and longer run-through of the month, with links to further information and sources.
CIAT May 2026 briefing.
From medieval scribes to modern word art.
ECA welcomes crackdown on late payment and push for clean energy, whilst CIOB seek fixed cladding removal timeframes.
Cyber Security in the Built Environment
Protecting projects, data, and digital assets: A CIOB Academy TIS.
Managing competence in the built environment
ITFG publishes new industry guide on how to meet the ICC principles.
The UK's campaign to reduce noise pollution: Mythbusting, articles and topic guides.




















