Is CertainTeed a good insulation?

Yes, CertainTeed insulation is considered very good and is one of the top four fiberglass insulation brands in the United States along with Owens Corning, Johns Manville, and Knauf. CertainTeed is owned by Saint-Gobain, a French building materials company founded in 1665, and manufactures its insulation in the USA. Its Sustainable Insulation fiberglass batts and rolls are well regarded because they use a formaldehyde-free, plant-based binder, are GREENGUARD Gold certified for low chemical emissions, and contain recycled content. Installers report that CertainTeed batts are soft, easy to cut with a utility knife, less dusty than older fiberglass, and maintain their shape without excessive slumping. The batts consistently achieve their labeled R-value from R13 to R38 when installed without compression. CertainTeed also makes InsulSafe SP blown-in fiberglass for attics, which has excellent coverage and low dust, and it makes a highly respected product called MemBrain, a smart vapor retarder that changes permeability based on humidity and is widely used in high-performance homes. Compared to Owens Corning Pink, CertainTeed is priced similarly or slightly cheaper and is available at Lowe's, Home Depot, and lumber yards. The brand does not have the same iconic color trademark or massive marketing as Owens Corning, but performance tests show it meets all ASTM C665 standards and building codes. It is a reliable, professional-grade choice for homes.