Post by troycethers on May 14, 2019 22:28:26 GMT -5
When the ceiling is a cathedral-type, then you must provide a space between the roof decks and the ceiling in order to have room for insulation and ventilation. Foil-faced batt insulation is recommended in cathedral ceilings because it offers the permeability rating required for use in ceilings without attics.
A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel. The most proper insulation level to use on ceilings are R-30 batts that are as thick as R-25 batts, but fit into a 2x10 framing.
When the spec is available, you can also add rigid foam insulation which increases R-values and eliminates thermal bridging, although this type of insulation must be covered with a fire rated material when they are used on the interior of a building.
R-value refers to the thermal resistance that different insulating materials have. The higher the R-value of a material, the better it insulates from heat and cold. The R-value of insulation depends on the type of material, its thickness, and its density.
A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel. The most proper insulation level to use on ceilings are R-30 batts that are as thick as R-25 batts, but fit into a 2x10 framing.
When the spec is available, you can also add rigid foam insulation which increases R-values and eliminates thermal bridging, although this type of insulation must be covered with a fire rated material when they are used on the interior of a building.
R-value refers to the thermal resistance that different insulating materials have. The higher the R-value of a material, the better it insulates from heat and cold. The R-value of insulation depends on the type of material, its thickness, and its density.