Construction weather resources
Practical guides, articles and references for contractors managing weather risk — from daily site planning and trade advisories to contractual notices and EOT evidence.
Articles & Guides
Construction weather risk — explained
Pricing weather risk at tender stage
How to quantify weather risk before the contract is signed — using historical data to calculate realistic unsuitable-day allowances by trade and month so weather risk is accurately priced into the tender, not absorbed as margin erosion during delivery.
Weather risk: a site manager's guide to daily construction planning
A practical guide for site managers, supervisors and foremen on using construction-specific weather information to plan daily operations — which trades are affected by rain, wind, heat and cold, how to think about thresholds, and how good daily decisions also protect the project's contractual position.
Proving an adverse weather extension of time claim
Weather is one of the most provable delay events — external, measurable, date-specific and testable against the contract. This guide explains the four elements every successful weather EOT claim must address, the contractual notice requirements that protect entitlement, and how to build evidence from day one.
Construction weather platforms: which type do you need?
A fair look at the four categories of weather platform used in construction — field workability apps, on-site hardware stations, enterprise alert systems and contractual workflow platforms — and how to match the right tool to your project's actual requirements.
Trade-specific weather thresholds and standards
A practical reference guide to the published weather thresholds that govern construction trade operations — craneage, roofing, concrete, protective coatings, abrasive blasting, earthworks, masonry and structural steel — with references to the standards and manufacturer guidance frameworks that define them.
How to issue a contractual early warning notice
Late or missing notices are one of the most common reasons contractors lose weather delay entitlement — even when the weather was genuinely disruptive. A practical guide to when to issue, what to include, and how Construction Weather removes the barrier to getting it done. Covers NZS 3910, AS 4000, NEC4 and JCT notice requirements.
Weather benchmarking: what 'once in ten years' means for your EOT claim
When NEC4 says weather must occur less than once in ten years to qualify as a compensation event, what does that actually mean? This guide explains what the 90th percentile threshold is, how it is calculated from historical data, and how it applies under NEC4, AS 4000, NZS 3910 and JCT contracts.
Weather clauses compared: NZS 3910, AS 4000, NEC4 and JCT
The same weather event can entitle a contractor to an extension of time under one contract and nothing under another. A side-by-side comparison of the entitlement test, notice requirements and benchmark standard across the four major standard forms — so contractors know what their contract actually requires.
Coming Soon
More guides are being published. Topics include:
- Critical path impact and weather delay analysis