A Rainwater collection system begins at the roof and ends at point of entry or use.

A well designed rainwater collection system considers what type of roofing material is to be used as the collection surface and what environmental hazards may be present in the surrounding area.

For instance, collecting rainwater for potable usage from a roof adjacent to a stockyard would not be a good idea, for airborne particulate from fecal matter can land on the roof.  Additionally, collecting from a roof near an interstate could have petroleum deposits. Cedar is poisonous, therefore should not be considered for collection for a potable system. Check with the manufacturer of any asphalt shingle type roofing for possible contaminants used in manufacturing.

It is recommended that a “raw water” sample be taken from the downspout and tested for contaminants before construction of a potable system.

Metal is the best choice of roofing material for collecting rainwater for potable usage, however clay, ceramic tile, fiberglass, and plastics are all compatible with collecting rainwater for potable use. Other materials can be considered if not used for potable usage or if carefully evaluated for safety.

“Gabled Houses” courtesy of duron123 / www.freedigitalphotos.net

Do you have more questions about your rainwater collection system?  Contact us!