Green roof maintenance in summer is essential as the UK continues to experience longer, drier spells. While most green roofs are designed to be low-maintenance, extended dry weather can place plants under stress and reduce the roof’s long-term performance if not properly managed.
Watering and Irrigation
Even drought-tolerant green roofs may need some extra watering during extended dry periods. Early morning or late evening is the best time to water, as it helps reduce evaporation and gives plants the best chance to absorb the moisture. If you have an automated irrigation system, it’s worth checking it regularly for efficiency and any leaks.
Visual Checks and Plant Health
It’s a good idea to keep an eye on your green roof throughout the summer. Signs of plant stress — like browning or wilting — are easier to manage if caught early. Removing dead or invasive plants helps maintain plant diversity and keeps everything thriving.
Substrate and Drainage
Hot weather can cause the substrate (the growing medium) to shrink or crack. It’s also important to make sure all drainage outlets are clear. If they get blocked, water can pool when the rain returns, which may lead to root rot.
Prioritise Safety at All Times
If you need to access your green roof for maintenance, always follow safe working-at-height practices. This includes:
• Using proper fall protection, such as guardrails, harnesses, or temporary edge protection
• Carrying out a risk assessment before starting any work
• Making sure access points are secure and any ladders or platforms meet safety standards
• Wearing appropriate PPE like gloves, sun protection, and non-slip footwear
• Avoiding working alone where possible
If your green roof is on a commercial or shared building, always check with your building manager or facilities team before accessing the roof space.
A Proactive Approach
Taking care of your green roof during the summer doesn’t just support plant health — it also helps the roof keep doing its job. From improving insulation to managing stormwater and encouraging biodiversity, green roofs play an important role all year round. Consistent green roof maintenance in summer ensures your system performs reliably long after the dry weather has passed.
For further advice or to speak with an accredited maintenance professional, contact your green roof system provider or visit www.greenrooforganisation.org