Green Roof Installers Sittingbourne

Green Roof Installation FAQs

Can I install a green roof on a roof that's not flat?

Yes, green roofs can be installed on sloped roofs, but it requires specific techniques and considerations:

• Reinforcement: Steeper slopes might require additional structural support or specialized retaining systems to prevent soil slippage.
• Drainage: A properly designed drainage system is crucial to ensure even water distribution and prevent erosion.
• Plant Selection: Choose plants suitable for the slope, taking into account sun exposure and drainage patterns.

Consult a qualified green roof installer experienced in sloped installations.

Are green roofs suitable for all buildings?

Green roofs can be installed on various buildings, but certain factors need to be considered:

• Structural Capacity: The building's roof structure must be strong enough to support the added weight of the green roof system, especially for intensive green roofs with deeper soil depths. A structural engineer can assess the roof's load-bearing capacity.
• Roof Slope: Green roofs can be installed on flat or sloped roofs, but steeper slopes require specialized design and installation techniques to prevent soil erosion.
• Accessibility: The roof should be accessible for installation and maintenance of the green roof system.
• Climate: Consider your local climate and choose plants that are suitable for the temperature, rainfall, and sunlight conditions in your area.

It's crucial to consult with a qualified green roof installer to determine your building's suitability and to discuss appropriate design and installation options.

What is the purpose of a drainage layer in a green roof?

The drainage layer in a green roof system serves several important functions:

• Removing Excess Water: Allows excess water from rainfall or irrigation to drain away from the roof, preventing ponding and ensuring the plants don't become waterlogged.
• Providing Airflow: Creates air space between the waterproofing membrane and the growing medium, promoting air circulation and preventing the buildup of moisture.
• Protecting the Waterproofing Membrane: Helps to protect the waterproofing membrane from punctures or damage caused by rocks, roots, or other sharp objects in the growing medium.

Drainage layers can be made of various materials, such as gravel, expanded clay, or specialized drainage boards.

How do I know if my roof can support a green roof?

Before installing a green roof, it's essential to have a structural engineer assess your roof's load-bearing capacity to ensure it can handle the additional weight. The weight of a green roof can vary depending on the type of system, the soil depth, and the saturation level of the growing medium. The structural engineer will evaluate the roof's design, framing, and supporting elements to determine if it needs reinforcement or modifications to accommodate the green roof's weight.