PIR is a thermal insulation board produced in a chemical process from rigid polyurethane (PU) foam combined with an isocyanurate catalyst. This is a very universal and efficient solution for all kinds of exposed roofs. Roof heat insulation functions as a thermal barrier designed to limit the movement of heat between the indoors and the outdoors, helping to maintain stable temperatures within a structure. This material placement reduces the load on heating and cooling systems throughout the year, improving energy. Quick Answer: R-value measures insulation's resistance to heat flow — higher numbers mean better insulating performance. Closed-cell spray foam tops the chart at R-6. 0 per inch, while standard fiberglass batts deliver R-3. Loose-fill insulation, also known as blown-in insulation, is blown or sprayed into place with special equipment.
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