Spray Foam and Bituminous Roofing Chart
Here’s a summary of some of the differences between spray foam and bituminous membrane roofing:
| Membrane Roofing | SPF Roofing | |
| Structure | ||
| Assembly | Overhangs and overlaps seams and joints | Continuous surface with no edges, seams, or joints |
| Flashings | Attached flashings | Self-flashing |
| Attachment | Secured to deck with fasteners | Self adhering (no fasteners) |
| Weather Effects | ||
| Projectiles | Subject to damage and penetration | Resists missile damage and penetration |
| Wind | Can lift off or peel under high wind | Grips building wall to resist high winds |
| Water | Peeling exposes interior to water | Continuous surface protects from water |
