Fiberglass shingles are a popular roofing material made with a glass fiber mat coated with asphalt and mineral granules. They are known for their durability, fire resistance, and relatively lightweight nature. When it comes to cool roof eligibility, fiberglass shingles can conform to cool roof standards if they have the right reflective coating or granules. Cool roofs reduce heat absorption by reflecting more sunlight and emitting absorbed heat, which lowers indoor temperatures and energy costs. Not all fiberglass shingles automatically qualify as cool roofs — the shingles must meet specific solar reflectance and thermal emittance values set by programs like ENERGY STAR or the Cool Roof Rating Council (CRRC). If you're evaluating your existing fiberglass roof, a simple DIY check is to compare the color and granule type: lighter colors generally reflect more heat. A less precise method is to place your hand close to the shingles on a sunny day; cooler shingles will feel less hot. However, this is subjective and for accurate verification, use or ask for manufacturer documentation or look for certification labels.
If you are considering replacing or upgrading your roof and want cool roof benefits, call a qualified roofing contractor who can verify your existing shingles’ eligibility or recommend compliant products. Ask the contractor if the shingles they recommend meet local cool roof codes or if they are ENERGY STAR or CRRC certified, as those certifications indicate verified performance. Also inquire about warranty conditions when choosing cool roof shingles, since some warranties depend on proper installation or specific product lines. It's smart to ensure your roof’s underlayment and ventilation are adequate for reflecting heat, too. Calling a roofer for an inspection can help identify any underlying issues such as missing or damaged shingles, which can affect roof performance and eligibility for cool roof rebates or incentives.