Hire a pro to install spray foam insulation.
How to insulate 2x6 rafters attic rooms.
Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.
So your choices are 3 1 2 thick batt insulation for an r value of about r 11 9 or rigid insulation board for a r 20 to r 30 depending on the type of board.
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.
R 19 is made for 6 inch framing and if you installed the vent trays properly there should have been enough air movement in the cavities to prevent condensation on the back of your roof sheathing without nailing extensions to the rafters.
If your attic rafters are 2 by 6 inch framing members i assume you used an r 19 batt insulation.
If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor.
Insulation radiant and vapor barriers best insulation technique for 2x6 cathedral ceiling i ve just finished tearing out a very poorly done finished attic.
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A how to on installing certainteed s fiberglass insulation batts into attic and cathedral ceiling applications.
Time to get the insulation finished and get this place warm.
Level uneven spots with a rake.
If you choose to use the 2x6 roof joists you ll only be able to fill the joist space up about 4 5.
With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door.
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.
Remember you ll need at least 1 air space above the insulation for attic ventilation.
Insulate across the top of flat attic.
It s a roughly 30x24 space with a 45deg.