Green roofs are low maintenance due to the plant species included. Once established the green roof requires either no irrigation or if so very minimal (depending on the specified system) and continues to develop and create a self-sustaining plant community on the roofscape, providing habitat for invertebrates, birds and bats. Specific procedures are recommended, particularly in the first few years during establishment, to ensure the long-term success of the green roof planting strategy. Although the maintenance requirement is minimal, it is also essential to actualize the benefits originally specified and to prevent any expensive remedial actions.
It must be stated that proper maintenance is integral to the success of any Extensive, Biodiverse or Intensive Greenroof, allowing the successional plant community to develop as it is designed. Roofing Brisbane Specialists a company specializing in Greenroof maintenance within the offers management contracts of 12 months and above, rejuvenation, remedial and conversion packages depending on the project requirements. Generally, as a guide, it is recommended that planned maintenance is to be carried out 2 or 3 during the first few years and twice in each subsequent year, although this depends on the system specification installed and the rate of vegetation cover. All rooftop management actions carried out must be in full compliance with the appropriate health and safety regulations, and particularly those explicitly dealing with working at height as specified in the UK GRO Guidelines.
The following detailed actions are typical operations related to the planted element of the roof only. Not all of the procedures will be relevant to every shelter:
Removal of unspecified and undesirable plant species: including invasive species and management of plant ratios. Plant species ratios become essential when considering Biodiverse-roofs and BREEAM stipulations.
Planted element health check: including pests and disease.
Reduction in the height of the plant layer or removal of spent flower-heads: depending on planting specification employed, for instance, the difference between a Meadow-roof and Sedum-roof (same number of visits).
Application of specially formulated nutrient source and substrate conditioner: to invigorate plant species, e.g., greening up red or brown Sedum-roofs, improving the density of growth, and flowering.
Inspection of gutters and drains: to keep waterways clear of litter, necessitating functional drainage.
Re-forming of pebble margins and removal of leaf litter: to tidy the green roof when and where required. Keeping pebble/crushed brick margins in order and removing debris from nearby trees during autumn.
Correction of the system: vital to prevent any expensive issues that may occur before they become serious, such as large-scale plant deaths, substrate acidification, and drainage failure.
A post-works report should be produced for client feedback benefit, with details of works undertaken, roofscape composition and future procedures required amongst other information, together with a comprehensive photographic record. A guarantee on the performance of the green roof planted element to coincide with the length of the warranty placed on the waterproofing is offered by some companies, while a management contract is in place. This tends to be dependent upon the original specification and quality of installation, determined by initial inspection where required.
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