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*Flow control device(s)
*Flow control device(s)


==Types of blue roof==
==Planning==
 
 
==Design==
Water can be slowed in running from a flat roof (up to 2%) through the use of:  
Water can be slowed in running from a flat roof (up to 2%) through the use of:  
*drain covers (most common),  
*drain covers (most common),  

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