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Wood mulch provides numerous functions to a bioretention practice including reducing soil erosion, filtration, protecting underlying soils from compaction, retaining moisture, and minimizing volunteer weed establishment. Communicate to contractor how to install and the mulch type in the plans and or specifications with notes, details, spot elevations, and other special features needed as per designed.
Equipment recommended for this task can be:
*Automated: Mulch blowers.
*Manual: Shovels, buckets, level rakes.<br>
'''During installation:'''
#Ensure that mulch depth should be no greater than 75 mm to maintain oxygen supply to underlying soils.
#Ensure that the top of the mulch meets the finish elevation as per design.<br>
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Spot8 p2 20190820.JPG|Machinery placing mulch in a rain garden at Glendale Public School in Brampton, ON. Read about the Design and Build Overview in this [https://sustainabletechnologies.ca/app/uploads/2020/09/CVC-Glendale-Rain-Garden-Case-Study.pdf case study].
ERI 2.jpg|Mulch layer as the final grade in the Haggert Ave bioswale project in Brampton, ON.
IMG 0098-1.jpg|Elevation problem with the mulch close to the end of this rain garden at Mineola P.S. This elevation is not allowing runoff to fully enter the rain garden and causing ponding in this low spot.
</gallery>
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