Many older homes have no insulation in the exterior walls. The problems this causes are obvious. Heat flows from more (inside) to less (outside in winter) right through the walls, and the opposite in summer. Nearly all walls leak air, insulated or not, causing drafts. To fix these problems Triple H insulated the exterior walls with dense packed cellulose insulation. Dense packing is a technique that packs the insulation in very tightly, so all the insulation gets into all cavities so prevent air leakage. With your exterior walls properly insulated there would be less drafts, warmer, less dust/pollen, and a more comfortable home.