A 20 mil coating will last 10 years a 25 mil coating will last about 15 years and a 30 mil coating will last about 20 years.
Life of sprayed polyurethane roof.
Spf roof system has a lifespan of about 10 to 20 years depending on how thick it is.
You have to completely remove the damaged foam and apply a new layer of spf and elastomeric coating.
If the polyurethane foam roofing materials are properly installed and coated every 10 20 years there is no calculable age limit where the foam loses its effectiveness.
Even severe damage is not as problematic.
Since a spray foam system consists of spray foam coating and granules after 10 20 years some of the coating and granules will naturally wear away.
The uv resistance comes from the silicone layer which is added above the polyurethane foam.
Best interval for recoating should be every 15 years.
Recoating should be done regularly if you want to extend foam s life expectancy.
Actually when elastomeric roof coatings are reapplied at strategic intervals on top of it spray foam roofing has been shown to last up to 50 years.
Sprayed polyurethane foam also referred to as spf probably has the longest roofing system lifespan in the study.
The foam could potentially last forever and still serve as a roof.
Plus multiple independent studies have confirmed the long life expectancy of this highly durable roofing.
A spray foam roof can be the last roofing system you ll ever need on a building.