Proper Insulation Roof Ceiling

For example cathedral ceilings built with 2x12 rafters have space for standard 10 inch batts r 30 and ventilation.

Proper insulation roof ceiling.

Cathedral ceilings must provide space between the roof deck and home s ceiling for adequate insulation and ventilation. There s a difference between insulating the ceiling and the actual roof slope. The general consensus is if in doubt attic insulation takes priority over direct roof insulation. 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.

Cathedral ceilings built using 2 x 12 roof rafters allow enough space for the fiberglass batt insulation and a 1 5 gap for ventilation. This type of roof assembly is designed so the air can flow up the soffit vent through an insulation baffle pass through the 1 5 gap between the insulation and roof sheathing then exit through a ridge vent. This can be achieved through the use of truss joists scissor truss framing or sufficiently large rafters. Before you slap on any headlamps you re going to want to determine what kind of insulation project you need to do.

Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and. Purchase rolls or packages of insulation that will fit in the spaces between the ceiling joists. Set up a stepladder tall enough to work comfortably from.