Loose-fill insulation is made up of small particles, such as cellulose, mineral wool, or fiberglass, which are blown or poured into loft spaces. This type of insulation effectively fills gaps and covers irregular areas, making it ideal for lofts with uneven or hard-to-reach spaces. However, the installation process is less tidy compared to other insulation methods.

Rigid foam boards, crafted from materials such as polystyrene, polyurethane, or polyisocyanurate, provide excellent thermal resistance. These boards are ideal for insulating either the loft floor or the underside of the roof. Their slim profile makes them particularly effective in lofts with limited headroom, offering high-performance insulation without taking up much space.

Spray foam insulation is a highly versatile option that expands on application, effectively filling gaps and creating an airtight seal. Available in two types—open-cell and closed-cell—each serves different needs. Open-cell spray foam is softer and provides excellent thermal insulation, while closed-cell spray foam is denser, offering both thermal and moisture resistance. This insulation is ideal for lofts with complex shapes or hard-to-reach areas. However, traditional rolls can deliver comparable results with a much neater and easier installation process.

Reflective insulation features materials with reflective surfaces, such as aluminum foil, designed to deflect radiant heat. This helps maintain a cooler home in summer and a warmer one in winter. While effective independently, it is often combined with other insulation types to enhance overall thermal efficiency.