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The seeds and invertebrate biomass present on the green roof (ground dwelling, flying and soil invertebrates such as /DUJHVWVSHFLDOLVWJURZHU VXSSOLHURIRYHU%ULWLVKQDWLYH earth worms and larvae) provide foraging for bird species. The old flower stems left in situ provide nesting material and nesting habitat can be provided on site at roof level through artificial nest boxes or ZLOGĂ RZHUVPDUJLQDO DTXDWLFSODQWVDQGVHHG within the building design. Perching provided at different heights can provide singing and hunting opportunities for priority species such as black redstart, Phoenicurus ochruros. The roof environment also ZLWKRYHU\HDUVH[SHULHQFH provides habitat for other bird species of conservation concern such as starling, house sparrow, herring gull and ringed plover.

BritishFlora

BIODIVERSITY FEATURES T: 01494 718203 Grange Farm F: 01494 718989 A biodiverse roof should include a variety of substrate types 'ĆŒÄ‚ĹśĹ?ÄžZŽĂĚ Í—Ĺ?ŜĨŽΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ and depths to increase the mosaic of habitat types, Ç Ç Ç Í˜Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ   tĹ?ÄšĹľÄžĆŒŜĚ vegetation structure and provide different microclimates for ĆľÄ?ĹŹĹ?ĹśĹ?ŚĂžĆ?ĹšĹ?ĆŒÄž invertebrate species. IdeallyŽžƉĂŜLJZÄžĹ?EĹ˝Í˜ϰϯϳϲϲϲϾ the extensive substrate depth ,WĎ­Ďąϲ ŽžƉĂŜLJsdEĹ˝Í˜ϳώϳϹϾϾϲϳϾ should range between 80mm up to 200mm to allow for different plant communities to develop. For example kidney vetch will establish on the shallow substrates and taller perennials such BritishFlora ^ƚĂč͗as knapweeds will thrive on the deeper substrates up to 200mm.

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DĂŜĂĹ?Ĺ?ĹśĹ?Ĺ?ĆŒÄžÄ?ĆšĹ˝ĆŒ 'ĆŒÄ‚ĹšÄ‚ĹľŽƾĆ?Ĺ?ĹśĆ?

Í—Ĺ?ĆŒÄ‚ĹšÄ‚ĹľÎ›Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ

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Other substrate types in addition to the extensive Í—ĹśĹ?Ĺ?ĞůĆ?ƚĞǀĞŜĆ?ŽŜΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ ,ĂžƉƚŽŜĹ˝ĆľĆŒĆš ϭϏͲϭϭ substrate can include sand mounds, pea gravel, shingle, DÍ—ϏϳϾϯϭϹϾώϰϯϳ pebbles, wood piles and boulders to provide damper areas and cover for ground^ƉĞÄ?Ĺ?ÄžĆ?>Ĺ?Ć?Ćš dwelling invertebrates.ϭώͲώϲ Substrate

^Ä‚ĹŻÄžĆ?ĚžĹ?ĹśĹ?Ć?ĆšĆŒÄ‚ĆšĹ˝ĆŒ ĹŻÄ‚Ĺ?ŜĞDĹ?ĹŻĹŻĆ? 

Figure 1-3 Sand mound and crevice garden at ϴͲϾ Pier Walk,'ĆŒÄžÄžĹśĆŒĹ˝Ĺ˝Ä¨ Greenwich Peninsula

Í—Ä‚ĹŻÄ‚Ĺ?ŜĞžĹ?ĹŻĹŻĆ?ΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ features should be considered where loading capacity ^ĞĞĚDĹ?džĞĆ? ώϳͲϯϏ allows on the building (discuss with architect/engineer). Where wind erosion is a problem heavier substrates can be dÄžĆŒĹľĆ?ĂŜĚŽŜĚĹ?Ć&#x;ŽŜĆ? ĎŻĎ­ and used effectively to weigh down the extensive substrate dÄžÄ?ŚŜĹ?Ä?Ä‚ĹŻDĂŜĂĹ?ÄžĆŒ Í—ĞůĂĹ?ŜĞΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ Insect Habitat Tower on Green Roof allow plants to establish by creating sheltered areas behind ĹŻÄ‚Ĺ?ŜĞ,Ĺ˝Ç Ä‚ĆŒÄš DÍ—ϏϳϳϲϏϲϭϲϯϳϹ stone piles. ĎŽĎŹĎ­ĎŽWĆŒĹ?Ä?Äž>Ĺ?Ć?ĆšͲ/ĹśĆ?ÄžĆŒĆš Water features can also provide an invaluable habitat and can increase insect biomass and provide bathing Ä?ŽůŽĹ?Ĺ?Ć?ƚ͏ŽŜĆ?ƾůƚĂŜƚ Í—ĹŻĹ?ÇŒĆ‰Ĺ˝Ç ÄžĹŻĹŻÎ›Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ opportunities for birds. Insect hotels can also provide additional habitat for priority invertebrate species and >Ĺ?ÇŒWĹ˝Ç ÄžĹŻĹŻ DÍ—ϏϳϰϯώϳώϹϳϏϹ can be added after initial installation.

MAINTENANCE Contrary to popular belief biodiverse roofs do require periodic maintenance throughout the lifecycle of the roof. The key tĞůÄ?ŽžĞƚŽ BritishFloraÍ›Ć?ĎŽĎŹĎ­ĎŽ/ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜWÄ‚Ä?ĹŹÍ˜KĆľĆŒĆŒÄžÇ€Ĺ?Ć?ĞĚĆ?ƉĞÄ?Ĺ?ÄžĆ?ĹŻĹ?Ć?Ć&#x;ĹśĹ?Ĺ?ŜώϏϭώĹ?ĹśÄ?ůƾĚĞĆ? maintenance period is up to 3 months after planting during the initial ‘establishment period’. Irrigation is particularly important Ä?Ĺ˝ĹľĆ‰ĆŒÄžĹšÄžĹśĆ?Ĺ?ǀĞĹ?ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜŽŜĞĂÄ?ĹšƉůĂŜƚĆ?ƉĞÄ?Ĺ?ÄžĆ?Ć?ĆľÄ?ŚĂĆ?Ĺ‡Ĺ˝Ç ÄžĆŒĹ?ĹśĹ?Ä?Ĺ˝ĹŻĹ˝ĆľĆŒÍ•ŚĞĹ?Ĺ?ŚƚĂŜĚĹ‡Ĺ˝Ç ÄžĆŒ in the first 10 weeks during dry periods. Ć‰ÄžĆŒĹ?Ĺ˝ÄšÍ˜dĹšĹ?Ć?Ć?ĞĂĆ?ŽŜÇ ÄžÄ‚ĹŻĆ?Ĺ˝Ĺ?ĹśÄ?ůƾĚĞÄ‚ĹśÄžÇ Ć‰ĆŒĹ?Ä?ĞůĹ?Ć?ĆšÇ Ĺ?ƚŚĹ˝ĆľĆŒĨƾůůĆŒÄ‚ĹśĹ?ÄžŽĨĆ‰ĆŒĹ˝ÄšĆľÄ?ĆšĆ?Í•ƉŽƚĂŜĚ

ĆšĆŒÄ‚Ç‡Ć?Ĺ?njĞĆ?͘dĹšĹ?Ć?ĎŽĎŹĎ­ĎŽWĆŒĹ?Ä?Äž>Ĺ?Ć?ĆšĹ?Ć?Ĺ?ĹśÄ?ůƾĚĞĚÄ‚Ć?Ä‚ĹśĹ?ĹśĆ?ÄžĆŒĆšƚŽƚŚĹ?Ć?/ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜWÄ‚Ä?ĹŹÍ˜ƚĞÄ?ŚŜĹ?Ä?Ä‚ĹŻ On roofs over 500m2 an automated sprinkler or leaky pipe ŜŽƚĞĂŜĚĞdžƉůĂŜĂĆ&#x;ŽŜŽĨĹ˝ĆľĆŒĆšĆŒÄ‚Ç‡ĂŜĚƉŽƚĆ?Ĺ?njĞĆ?Ć‰ĆŒĹ˝Ç€Ĺ?ĚĞĆ?Ä¨ĆľĆŒĆšĹšÄžĆŒĆ‰ĆŒĹ˝ÄšĆľÄ?ĆšĹ?ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜÄ¨Ĺ˝ĆŒĹ˝ĆľĆŒ system should be considered to maintain plant health. For plug plants irrigation is required every 2-3 days to once a week during Ä?ĆľĆ?ĆšĹ˝ĹľÄžĆŒĆ?͘/ĆšĹ?Ć?Ĺ˝ĆľĆŒĹ?ŜƚĞŜĆ&#x;ŽŜƚŚĂƚƚŚĹ?Ć?Ĺ?ĹśÄ?ĹŻĆľĆ?Ĺ?ŽŜÇ Ĺ?ĹŻĹŻžĂŏĞĹ˝ĆľĆŒÄ?ĹŻĹ?ĞŜƚ͛Ć?ƚĂĆ?ĹŹŽĨƋƾŽĆ&#x;ĹśĹ?Ä¨Ĺ˝ĆŒ the establishment period but wildflower blankets require daily Ć‰ĆŒĹ˝ĹŠÄžÄ?ĆšĆ?ĂŜĚĹŠĹ˝Ä?Ć?žƾÄ?ŚƋƾĹ?Ä?ĹŹÄžĆŒĂŜĚĞĂĆ?Ĺ?ÄžĆŒĂŜĚĹ˝ĆľĆŒĆ?Ä‚ĹŻÄžĆ?ĂŜĚƚĞÄ?ŚŜĹ?Ä?Ä‚ĹŻƚĞĂžÄ‚ĆŒÄžĆšĹšÄžĆŒÄžƚŽŚĞůƉ irrigation during dry spells. Green roofs are very nutrient poor Ç Ĺ?ƚŚĂŜLJÄ¨ĆľĆŒĆšĹšÄžĆŒĆ‹ĆľÄžĆŒĹ?ÄžĆ?LJŽƾžĂLJĹšÄ‚Ç€ÄžÍ˜

environments and therefore the use of a slow release fertilizer

2

BritishFlora ,6 FREE

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British flora green roofing information booklet 20pp a4  

British flora green roofing information booklet 20pp a4  

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