Scheme Length: ECO4 grant is offered till 2026, time is of the essence to benefit from this free money support. Some considerably less frequent loose-fill insulation products incorporate polystyrene beads and perlite. Loose-fill insulation is usually put in in both enclosed cavities which include walls, or unenclosed Areas for instance https://freeecogrants.co.uk/what-are-the-steps-to-apply-for-free-external-wall-insulation/