Insulating The Roof Deck

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 the roof deck. For the same reason insulation shouldn t touch the roof s underside. The ratio of insulation above the roof deck or air permeable insulation below the roof deck is a matter of climate and interior conditions. You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space. Insulating the floor and the roof this is certainly the most interesting solution when the attic is also going to be used.

Also the higher the indoor humidity the more insulation is needed to avoid condensation. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls. When installing a foil faced foam board insulation. When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air.

Cold roofshave insulation between the rafters allowing for ventilation space below your roof deck. Install baffles or make sure there s 1 minimum of airspace between the roof deck and insulation. Rigid foam insulation boards. Materials commonly used for the insulation of the roof deck include.

Hot roofsare insulated above the rafters. There are different roof decks that require different insulation techniques. Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck as is the case with cathedral ceilings. However it is the most labour intensive and most expensive option.

Add insulation above the roof deck this approach fits current building science thinking in terms of putting the thermal control layer on the outside of the building structure. In addition to installing the foam board on the underside of the roof deck you can attach it to the bottom edges of the. Typically this would be achieved by adding polyiso insulation above the plywood deck. Generally more insulation is needed for condensation control in colder climates.