Changes

!Limitations

!Limitations

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*Does not require ground level space, so particularly well suited where ground space is limited or sites with large flat roofs,

*Do not require ground level space, so particularly well suited where ground space is limited or sites with large flat roofs,

*May not require additional sewer connections,  

*May not require additional sewer connections,  

*Easy to retrofit if structural support and waterproofing are adequate,

*Easy to retrofit if structural support and waterproofing are adequate,

*Relatively low cost

*Relatively low cost

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*Absolutely need regular inspection and maintenance,  

*Absolutely need regular inspection and maintenance,  

*Limited application on sloped roofs or sites with small building footprints,

*Limited application on sloped roofs or sites with small building footprints,