It helps resist moisture that can lead to mold or mildew and provides increased sound and thermal insulation.
Insulation board for attic roof.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
Install foam boards with the foil side facing you.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.
It can act as an air and moisture barrier in addition to providing very high r value.
Insulating your roof and attic space will help retain energy in your home often leading to cost savings and comfort improvement.
To create an airtight seal use foil tape.
Better materials for attic roof insulation are rigid foam boards and spray foam insulation.
The superattic system utilizes proprietary silverglo rigid foam insulation panels to fully seal and insulate the attic directly beneath the roof rafters and directly inside the gable ends.
Your board must leave at least inch gap between the board and the roof.
Technically known as spray polyurethane foam or spf spray foam is most commonly applied in the space between attic rafters.
Try a spray foam insulation kit to fill cavities gaps cracks expansion joints and other sources of air leaks.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.