Fecal coliform can be well above guidelines all government guidelines regardless of roofing material.
Roof for rainwater harvesting.
Also petroleum hydrocarbons are present in roof water.
Asphalt shingles are the most common material used on roofs and luckily they are also a very good option when it comes to rainwater harvesting.
The quality of water coming off of a roof during a rain tends to improve as the rain continues.
There are some important factors about the roof to consider when planning for a rwh system.
There is very little water loss with tin around 5 and no worries of contaminants leaching out from the tin with an approved nsf 61 coating.
New information is available about rainwater harvesting from composition roofs.
Roof material the material of the roof is not as important as contaminants that may be on the roof.
If done with care and maintenance roof catchment of rainwater is a very good source of drinking water.
One of the main reasons is their uneven surface it makes it harder for soot and other pollutants and dirt to gather on top of it.
For single storey homes your roof surface area will often be greater than your floor area unless you have a flat roof.
Your roof surface area is the size of your roof expressed in square metres or feet.
There s just a short list of rooftop surfaces that rainwater harvesters should avoid.
The problem is that some shingles can leach off certain contaminants into the water causing the rainwater system to fail even for irrigation only.
For the vast majority of tank based rainwater harvesting systems the catchment area is the roof surface.
Building a rain roof as another option to harvest rainwater for home garden or livestock use.
Specifically this is set up for my rainwater garden area but c.
Greenhouse roof has the highest collection efficiency most surfaces are a ok.
Asphalt shingles many shingles work with rainwater harvesting.
Tin tin is one of the best rainwater harvesting roof materials to have on a project.
And this is when it is operating at its least efficient rate of purification at 32 degrees f.
While metal roofing or plastic sheeting e g.
As your roof surface is the catchment area for harvesting rainwater it s important to know how large or small it is so you can calculate how much rainwater you can expect to harvest.
The good news is most roofing materials are suitable for rainwater harvesting.