Lijan Greentech is Supplier and Service Provider of Heat Protection in Buildings. Preventing Heat Entering into Building is Most Important Aspect in this. Sun Heat Enter into Buildings through Roofing and Side Walls. Both can be Insulated Using Eco Friendly Materials. Heat reflective Insulation Sheet with Aluminium Foil and XLPE or Air Bubble Plastic as Sandwich are Best in this Application. Aluminium Foil having more thickness will Help in Reflecting Heat More Effectively. Thickness of such Insulation Material is Commonly 4 - 6 mm. Thicker Materials are Available to be used Depending on Type of Insulation Laying. Roof Cool is one of the Best Heat Reflective Insulation Materials Available in the Market.