03-13-2010, 03:31 AM
TPO is thermoplastic polyolefin and comes in white, tan and gray. No need to paint or coat it ever. Relying on a filter to take out contaminants that you know you are putting in your own water with your roofing choice seems like Russian roulette to me! Why not keep your water as pure as possible all along?
As far as water flushing debris over the gutters, a properly designed roofing and gutter system will NOT flow over the gutters in a heavy rain. If it does, the gutters are not designed or installed properly. If you want to flush contaminants from the roof, consider a downspout filter and first flush diverter system. Some of the best on this island are designed in Australia where, because of a decade long drought, they have studied this subject to the nth degree. They are sold at Waterworks in Hilo. You can view them here: www.rainharvesting.com.au
As far as water flushing debris over the gutters, a properly designed roofing and gutter system will NOT flow over the gutters in a heavy rain. If it does, the gutters are not designed or installed properly. If you want to flush contaminants from the roof, consider a downspout filter and first flush diverter system. Some of the best on this island are designed in Australia where, because of a decade long drought, they have studied this subject to the nth degree. They are sold at Waterworks in Hilo. You can view them here: www.rainharvesting.com.au