How To Insulate 2x6 Rafters Attic Rooms

Remember you ll need at least 1 air space above the insulation for attic ventilation. Insulation radiant and vapor barriers best insulation technique for 2x6 cathedral ceiling i ve just finished tearing out a very poorly done finished attic. 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.

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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.

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. 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. Level uneven spots with a rake. Check out our how to video at the link below.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. 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. 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. If your attic rafters are 2 by 6 inch framing members i assume you used an r 19 batt insulation.

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. 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. Https youtu be w4mkphzmqxw contact us restorat.

Time to get the insulation finished and get this place warm. It s a roughly 30x24 space with a 45deg. A how to on installing certainteed s fiberglass insulation batts into attic and cathedral ceiling applications. Insulate across the top of flat attic.

Hire a pro to install spray foam insulation.

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