My home is shaped like a square box. The four corners of the upper level have the roof pitch from the gables protruding into the rooms. The attic has no insulation and I need to insulate it. There is access from the attic to look down into the wall/ceiling that protrudes into the room. I can insulate the attic myself but the surface area of these protrusions is rather large. What would be the best way to get insulation down in there? Shoot the insulation in and poke it with a stick to make sure there is good coverage down in the wall space? The opening is about 6 inches high.Thanks.
Loose fill cellulose can be blown into your attic. I don't know if I understand the protrusions that you are describing but if you can freely blow the cellulose fiber into this space it should serve as a good insulation. You don't want to poke it in with a stick because you don't want to compress it. If you cannot blow this product directly into the space, you would be better off stuffing it lightly with fiberglass batting. Just don't cram it too tightly. It needs to be loose to be most effective.
You need to have an air space between the roof and your insulation to prevent moisture build up on the inside and ice damming on the exterior. So you want to insulate the ceiling of the room, not the roof. For the angled protruding parts they make inserts that go between the joists to give 1-2" of air space under the roof and you can put insulation under that against the wall of the room. Remember that it's trapped air that insulates so don't overstuff when you push it in there. It sounds like you don't have access behind the vertical walls. You may need to break through the plaster between the studs to get in there and put insulation on the wall of the room and on top of the ceiling below. Then get some sheetrock and spackle to repair the hole you had to make, or you can make an insulated removable panel and use that area for storage. But don't store anything in there that can't take heat/cold.
