Insulating A Workshop Roof

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.

Insulating a workshop roof.

Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. If you have a flat garage roof and an attic above you can install the garage insulation from below using a standard ladder. You should use some foil tape to make sure that the insulation is stable on the roof edges. 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.

Cold roof a very bad idea. Made primarily from recycled newspapers and treated with a fire retardant cellulose is usually blown into wall and ceiling cavities with a special blowing machine that also aerates the cellulose and fluffs it up. Batt insulation is similar to a roll of insulation except they re cut in strips instead of one continuous length. Whether you need to insulate your roof rafters will depend on what you intend to do in the space directly beneath the rafters.

To produce a hot roof rigid insulation is fitted outside above the weatherproofing. For the same reason insulation shouldn t touch the roof s underside. This is then covered with a further weatherproofing layer. In this case the strips are sixteen inches wide x four feet long.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Batts are easier to install than rolls because there s less cuts to make but they re more prone to air leaks since it relies on the installer to get a good fit. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. In either case you will need to follow the general steps below to insulate your garage roof.

Once the garage insulation is installed it s important to take a quick inspection of the area. This allows you to put insulation on the bottom side of the rafters but allows outside temperature air to circulate under the roof continued michael karas feb 20 16 at 23 18. Opening vents in the soffit would allow air to flow from the low edge of the roof up along each channel between the rafters and up to your ridge vent. Make sure that all of the pieces are the same size so that they fit into the trusses.

To install the insulation overhead you need to staple the pieces to the roof trusses. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. However if you have a cathedral style garage roof you will need a scaffolding to get into the upper areas of the roof.