Insulation Between Roof Trusses

A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel.

Insulation between roof trusses.

With a regular roof insulation isn t a problem. Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing. Box out light fixtures. Uneven or sloppy application however can make the insulation ineffective and unsealed open cell insulation can absorb moisture causing the roof to rot or leak.

You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters. Increasing your home s value. Convenience polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials. Other benefits of roof insulation include.

To insulate the underside of the ceiling between rafters you ll want to add insulation to the exterior portion of the finished ceiling. Insulation between the joists keeps warmth in your living space below and creates a cold loft while insulation in the rafters allows you to keep warmth in the roof space as well. Water is insulation s enemy. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow.

The bigger issue comes around when you are dealing with a roof that has exposed trusses cathedral ceilings or specialty open ceilings. When it comes to pitched roofs however adding a thick layer of insulation to the rafters can result in a depth of roof construction that may not.