One for attic prep and the second to actually blow the insulation.
How do you insulate attic ceiling.
With a finished attic insulation must help keep the attic areas comfortable.
If you re finishing your attic insulating it to the proper r value can cause a dramatic loss of headroom if you limit yourself to fiberglass batts.
You can do it yourself for about 500.
How much does attic insulation cost.
Insulating the attic floor.
Blowing attic insulation isn t hard but it s dusty sweaty work.
If it is and you plan to provide heating and cooling to the finished attic space you need to remove.
If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof.
To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.
Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in.
In practical terms you can choose between mineral wool or insulation boards.
If you don t have an attic however there is no alternative but climb a ladder and do it by hand.
How to insulate a finished attic.
To make insulating an attic easier grab a helper and set aside two days.
Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing.
The pros charge 1 500 to 2 000 to do a 1 200 sq ft.
If you do not use the attic much it is pointless heating this area.
If you have an attic there are quick ways to insulate the ceiling from above after drywalling it.
This type of ceiling is insulated in the same manner that you would insulate a standard attic space.
That means insulating the attic floor only not the walls and having vents in the roof.