Insulating Roof Trusses

In either case you will need to follow the general steps below to insulate your garage roof.

Insulating roof trusses.

Place the plastic sheeting on top of the rolled insulation. However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof. If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. To insulate the underside of the ceiling between rafters you ll want to add insulation to the exterior portion of the finished ceiling.

Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss. A variety of insulation materials can be used to insulate scissors truss roofs as long as. The quest for greater energy efficiency in buildings has led to increasing interest and need for insulation improvements in hvac equipment more airtight construction new materials and assemblies. Images courtesy simpson gumpertz heger.

For rolled insulation place it between roof rafters. If the plastic sheeting is in pieces overlap the pieces. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. Like many other building materials insulating spray foams for use on roof rafters and attic surfaces come with advantages and disadvantages.

Then feed the rolled insulation under wires and pipe if either is present. Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense. The relatively costly application for example can also save money by lowering your energy bills and enabling you to add your own insulation with a contractor s help. With a regular roof insulation isn t a problem.

Roof insulation configurations for unvented rafter truss assemblies. If you ended up with scissors trusses without raised heels. Like ordinary roof trusses scissors trusses come with or without a raised heel sometimes called an energy heel. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be.