Spray polyurethane foam (SPF) roofing is a popular choice for homeowners because it offers excellent insulation and a seamless, waterproof barrier. However, like any roofing material, it won't last forever and may need replacement or significant repairs after 15 to 30 years, depending on exposure and maintenance. Replacement cost for an SPF roof varies widely based on the roof size, thickness of the foam, necessary tear-off, and any additional coatings required. On average, you can expect to pay between $4 to $7 per square foot for a full removal and reinstallation, including prep work. Simple diagnostic checks you can do yourself include walking the roof carefully to detect soft spots or cracks in the foam’s surface. Look for discoloration or areas where water pools after rain, which might indicate compromised waterproofing. Keep in mind that SPF foam can be sensitive to UV damage and weather, so regular inspections every year or two are a good idea to catch problems early.
If you notice bubbling, cracking, or large cracks in the foam or the protective coating, it’s time to call a professional roofing contractor who specializes in SPF systems. When seeking estimates, ask if they include the cost to remove old foam and the type of protective coating they recommend for your climate. For warranties, clarify how long the foam and coating are covered and what kind of maintenance you need to perform to keep it valid. Also, discuss their experience with SPF and check for manufacturer certifications. A good question might be: “Can you show me examples of roofs you’ve replaced or repaired in my area, and what has the typical lifespan been?” This helps ensure you hire someone knowledgeable who will provide a durable solution within your budget.