Weather Documentation on Construction Sites: Why It Matters

Why Document Weather on Construction Sites?

Weather is one of the most common causes of construction delays – and one of the most disputed. Without proper documentation, proving that a delay was weather-related becomes nearly impossible.

Weather records in your construction diary serve three critical purposes:

• Legal protection – Evidence for delay claims and force majeure arguments
• Quality assurance – Ensuring materials are applied within proper temperature and humidity ranges
• Schedule management – Tracking weather-related downtime for realistic project planning

What Weather Data Should You Record?

A compliant weather entry should include:

1. Temperature – Morning, midday, and afternoon readings (or min/max)
2. Precipitation – Rain, snow, hail – including intensity and duration
3. Wind – Speed and direction, especially relevant for crane operations
4. General conditions – Sunny, overcast, foggy, frost
5. Ground conditions – Frozen, waterlogged, dry (affects excavation and foundation work)

Legal Requirements in Germany

Under VOB/B §6 Abs. 2, contractors can claim schedule extensions for weather conditions that could not reasonably have been anticipated. However, the burden of proof lies with the contractor – and that proof comes from consistent, daily weather documentation.

Key thresholds to be aware of:

• Concrete work must not be performed below 5°C without special measures (DIN 1045)
• Crane operations are typically halted at wind speeds above 60–72 km/h
• Roofing and exterior work is unsafe during heavy rain or ice
• Asphalt paving requires minimum temperatures of 10°C (surface) for proper compaction

The Problem with Manual Weather Records

Many site managers still estimate weather conditions from memory at the end of the day. This leads to:

• Inaccurate records – "It rained a bit" is not evidence
• Inconsistency – Entries missed on busy days
• Disputes – Opposing parties can challenge vague descriptions with actual weather station data

Automatic Weather Documentation with docubau

docubau eliminates manual weather recording entirely:

1. GPS-based location – Your project address is linked to the nearest weather station
2. Automatic data pull – Temperature, precipitation, wind, and conditions are recorded every day
3. Integrated in reports – Weather data appears automatically in every daily site report PDF
4. Historical accuracy – Data comes from official meteorological sources, not estimates

This means your weather documentation is always complete, always accurate, and always defensible in a dispute.

Even if no one works on site that day, weather data is still recorded – crucial for documenting frost days, heavy rain periods, or other schedule-impacting conditions.

Try docubau free for 14 days →