Polystyrene and polyurethane are two common insulation materials used in garage doors, each offering distinct advantages. Polystyrene insulation is similar to Styrofoam and is often used in panel form within the door. It provides good thermal resistance and is more cost-effective, making it a popular choice for budget-conscious homeowners. However, it is less dense and doesn’t adhere to the door as seamlessly as polyurethane. Polyurethane, on the other hand, is a spray foam that bonds directly to the door, creating a stronger, more durable structure. It offers superior insulation, noise reduction, and energy efficiency due to its higher R-value and denser composition. While polyurethane-insulated doors typically cost more, their enhanced performance and durability often make them a worthwhile investment for those seeking long-term benefits.

Most steel garage doors are available in up to three layers, providing options to suit various needs and budgets. A single-layer steel door consists of just the steel panel, offering a lightweight and economical choice but minimal insulation and soundproofing. A double-layer door adds a layer of insulation, typically polystyrene, behind the steel, enhancing thermal efficiency and noise reduction. The premium three-layer design features steel on both the exterior and interior with insulation sandwiched in between, delivering maximum durability, energy efficiency, and quiet operation. This layered construction not only improves performance but also adds to the door’s strength and aesthetic appeal, making it a popular choice for homeowners seeking a balance of function and style.