Calculate the Total Cost of Ownership (TCO) by factoring in the initial purchase price, shipping volume (insulation is bulky), and installation labor costs. While Spray Foam (SPF) has a higher upfront cost, its air-sealing capabilities can reduce energy bills by up to 20% more than traditional batts. For large-scale projects, sourcing from Made-in-China.com allows for bulk discounts (often 15-25%) when ordering full container loads (FCL), which significantly offsets the high shipping costs associated with lightweight, high-volume goods.