Insulating Garage Roof Trusses

The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow.

Insulating garage roof trusses. Make sure that all of the pieces are the same size so that they fit into the trusses. Whether you need to insulate your roof rafters will depend on what you intend to do in the space directly beneath the rafters. For example if the space beneath the rafters is going to be used for a living area then you will need to insulate the roof rafters. Make sure that the materials you buy for your insulation are in compliance with the local construction rules and regulations and follow the fire codes.

If the collar ties are 2x6 then the most blanket type insulation you can install is r19. Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no. Don t forget to add a vapor retarder to your garage roof insulation installation. Ideas for insulating a garage ceiling 2 how to install insulation in garage.

Energy trusses are designed to allow greater insulation depths at the heel. This helps prevent garage floor condensation and water logging on the sheathing and wood trusses. Fiberglass blanket would definitely be the most cost effective in a small space such as you have. For the same reason insulation shouldn t touch the roof s underside.

To install the insulation overhead you need to staple the pieces to the roof trusses. I would use unfaced f g and a 4 or 6 mil plastic vapor barrier installed before you drywall.