Garage Ceiling Insulation

[SpookyEng]

The framing inspection is supposed to be complete in the next week. After that comes the drywaller (Ceiling only, I will do the rest). My question is. The attic floor is in and my plan was to place batt insulation underneath the floored part prior to the drywall insulation and then blow in the rest at a later date. The distance between the attic floor and drywall is about 8 inches. I was planning on using 6 1/2 in insulation. Does this sound like the best way to do it? Also the stairway is open to the attic and I was wondering about the efficiency of insulating the attic floor with such a large opening. Pics attached.

 

[Cougar]

Is the attic going to be heated.

 

[SpookyEng]

No, the attic is strictly for storage space.

 

[hillbill9889]

Mine is similar in that I have a lofted area in the middle of my trusses for half of the garage. For that area between the floor and the downstairs area I did not put any insulation there before putting up the drywall.

It was my understanding that insulation only goes in area that separate the cold area from the insulated area. So simlar to yours, I think, the insulation only goes in the area where your trusses do not have the upstairs area. Then, the insulation goes up those walls that separate the upstairs area from the open truss area. Figure a picture may help better than words...

As you can see, mine is an open loft but I think the same things would apply.

View media item 23847
View media item 23846

 

[Cougar]

It was my understanding that insulation only goes in area that separate the cold area from the insulated area. So simlar to yours, I think, the insulation only goes in the area where your trusses do not have the upstairs area. Then, the insulation goes up those walls that separate the upstairs area from the open truss area. As you can see, mine is an open loft but I think the same things would apply.

That's what I was thinking.
Unless the OP puts a door at the bottom of the stairs to the attic.

 

[SpookyEng]

hillbill9889-Thanks for the illustration that helps a lot. I may end up walling up the sides of the loft storage area to separate it from the rest of the attic. I was planning on treating the storage area as part of the attic (in your example a "cold" area) but it may make more sense to treat as a "warm" area and isolate it from the rest of attic.
Cougar- I have a landing downstairs that makes a door rather challenging but I think separating the two spaces makes sense.