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Once the wall is remodeled and enclosed systems are installed, insulation is added before the wall is covered with sheathing. Insulation slows down the heat transfer process. During summer, it slows down the hot air outside trying to get into the cool house. In winter, it slows down the cold air outside from getting into the warm air inside. The greater the insulation the slower the heat transfer. There is a wide variety of insulating materials used in home construction and remodeling. The most popular are blanket, batt, fill, reflective, and rigid. Each do about the same job so the selection depends on how easy it is to install in your remodel. Blanket and batt insulations are placed between studs, fill is blown into the wall typically after it is sheathed, reflective insulation is enclosed in walls, and rigid insulation often is installed on the exterior of the wall framing as a sheathing. Remodeling Words R-value is a measurement of the amount a specific material restricts the transfer of heat. In moderate climates, for example, local building codes require an R-19 rating for exterior walls and R-30 for attic floors. In the coldest climates these numbers are R-22 for exterior walls and R-49 for attic floors. Make sure you buy the appropriate R-value insulation for your bathroom remodel.
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