You can reduce dust buildup using an unvented attic versus a vented attic.
Insulating gable ends in conditioned attic.
Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well.
This has several advantages including less air transfer and what air does transfer is conditioned.
An exception to the rule would be if you are installing a foil radiant barrier system.
5 insulating the exterior roof deck is not feasible.
Usually the only time you would insulate a gable.
A gable wall also called a gable end more commonly refers to the entire wall including the gable and the wall.
However there is daylight at the eaves.
When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still.
The rafters are 5 5 deep 16 o c.
7 gable ends are north and south.
Once you get the gable ends framed correctly you will be able to insulate the attic.
4 there are no intentional soffit vents just a fan at each gable end.
6 i d like to minimize encroachment of the roof into the room.
Unvented attics are built with insulation of the attic is placed at the roof level and the area inside the attic is a conditioned space.
If it is located in a conditioned part of the house also remember to insulate and air seal your attic access.
Before insulating seal any air leaks and make roof and other necessary repairs.