Silicone Roof Systems and Existing Metal Roofs (Costs, Durability, Benefits)

Silicone coating systems are among the best solutions for aging commercial metal roofs — addressing leaking fasteners, seam failures, and rust simultaneously in one seamless application.

Costs

Silicone coating only over metal: $2.50–$5.00/sq ft. Spray foam plus silicone (for insulation): $4.00–$8.00/sq ft. Full metal replacement: $8–$15+/sq ft. Restoration at 30–60% of replacement cost makes compelling financial sense for structurally sound metal roofs.

Durability

High-solids silicone is 95% solids content, UV-resistant (doesn't chalk or degrade in sunlight), and remains flexible across extreme temperature swings — critical for metal roofs that expand and contract daily. With a renewable warranty system, properly maintained silicone-coated metal roofs can last indefinitely.

Key Benefits

Seals all fasteners and seams simultaneously, eliminates active leaks, reflects solar heat to reduce cooling costs, provides 10–20-year renewable warranty, requires no tear-off, and is typically completable in days. For most aging metal roofs in adequate structural condition, silicone restoration is the clear financial and performance winner.