Where SPF Roofing Makes Sense
SPF roofing can be considered for commercial roofs, industrial properties and some residential roof assemblies when the existing surface and weather conditions are suitable.
Spray foam can be applied to substrates such as shingles, concrete, wood and asphalt when the surface is properly prepared.
Benefits and Tradeoffs
SPF roofing can offer a seamless surface, coverage over irregular shapes, low tear-off waste in many projects, and the ability to recoat an existing foam roof coating.
The same page also names tradeoffs: overspray potential, UV damage if the foam is not coated, weather-dependent installation windows, and the need for an experienced contractor.
Roof Coatings and Maintenance
Spray polyurethane foam roofs need to be coated to help seal and protect the foam.
It also recommends checking an SPF roof at least twice a year, especially after weather hazards such as hailstorms or high winds.