How To Insulate 2x6 Rafters Attic Rooms

You can use rigid foam panels or do as tom silva does with nearly all houses these days.

How to insulate 2x6 rafters attic rooms. 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. Remember you ll need at least 1 air space above the insulation for attic ventilation. In these designs take out attic floor insulation only below the finished space from knee wall to knee wall and insulate the knee walls themselves. If you choose to use the 2x6 roof joists you ll only be able to fill the joist space up about 4 5.

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. A how to on installing certainteed s fiberglass insulation batts into attic and cathedral ceiling applications. Https youtu be w4mkphzmqxw contact us restorat. 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.

Insulation radiant and vapor barriers best insulation technique for 2x6 cathedral ceiling i ve just finished tearing out a very poorly done finished attic. 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. Level uneven spots with a rake. It s a roughly 30x24 space with a 45deg.

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. Insulate across the top of flat attic. 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. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered.

If your attic rafters are 2 by 6 inch framing members i assume you used an r 19 batt insulation.