If potable water is needed take care in selecting materials and elastomeric roof coatings which will come into contact with the water as it is collected since some impurities can be picked up by the rainwater as it travels through the collection system.
Potable water roof coating.
It s the type of roof i have on my own house.
When our roof was new the water it collected was clear and smelled clean.
By far the most common metal roofing is the type that is factory painted steel.
Elastuff 120 is a 100 solids 2 part polyurethane elastomer coating for waterproofing and protecting all types of surfaces.
Safecoat dynoflex roofguard elastomeric roof coating a water based low odor roof coating suitable for properly primed roofs.
Spray liquid pour or brush roller applied at outside temperature no heat source or flame required.
Black jack roof gard 700 55 gallon elastomeric reflective roof coating 7 year limited warranty item 1299404.
Energyguard silicone coating energymax silicone coating.
The coating is made from silicone allowing for superior protection against permanent ponding water uv rays and temperature extremes.
The equipment and systems that collect treat and transport it must be protected to ensure reliable performance and water quality.
The manufacturer has verified that this product is.
Commercial roofs are our speciality rtt sealant is a potable water certified as nzs4020 2500 elastomeric coating engineered to provide exceptional adhesion elasticity and protective properties.
Black jack ultra roof 1000 55 gallon elastomeric reflective roof coating 10 year limited warranty item 1299406.
Lead free mercury free cadmium free copper free antimony free this likely makes it a living building challenge compliant product.
It is safe for potable water catchment service and is designed for use as a protective and waterproof seamless membrane for pitched roof surfaces ultraviolet protection of existing roofing materials or as a finish coat over weather barrier 1530 base coat.
For pricing and availability.
Arc s potable water certified industrial metal coating products meet the demanding requirements of the nsf 61 standard while also protecting plant systems from corrosion and erosion.
Here in hawaii metal roofing for water catchment is common.
Stretches 1000 with 95 recovery.
An example of this can be seen on the website of my island s main supplier hpm.