If you’re building a new home or renovating an existing property, roof insulation is one of the best investments you can make to reduce energy costs. Insulation prevents heat from escaping during summer and excess warmth from entering during winter, allowing for better temperature control and overall energy efficiency.

Different roofing insulation materials are available to meet the needs of your project. Choosing the right insulation material for your roofing system can have a significant impact on the thermal resistance of your building and its performance over time.

Rigid foam plastic insulation boards are available in a variety of types and sizes, with different densities to suit various applications. Foam plastic insulation is a flexible solution for both adhered and ballasted roof systems. Some common insulation products include polyisocyanurate, extruded polystyrene (XPS) and expanded polystyrene (EPS). Foam plastic insulation also features foil facers to serve as a radiant barrier in some climates.

Comparing Roofing Insulation Materials: Which One Is Right for You

Spray foam insulation is a great choice for hard-to-access areas of the roof, such as around chimneys and skylights. It expands on application to fill nooks, crevices and other gaps, offering superior air and moisture resistance. Spray foam insulation can achieve an R-value up to 7.2 per inch, depending on the product used and installation method.

Mineral wool insulation is made from rock-derived material, providing fire resistance, soundproofing and insect-repellent qualities. It’s an affordable option that has a high R-value and can be installed in a variety of ways. Polyester insulation is made from recycled polyester fibres and is an eco-friendly alternative to other materials.