Attic Insulation R13 Vs R30

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Attic insulation r13 vs r30.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. The depth of the 2x4 is 3 5 inches which will accommodate r11 or r13 insulation. 1 4 of 4 posts. The key is to figure out how much it s going to cost you to get those savings.

Add insulation to attic. Existing 3 4 inches of insulation. Here s what i mean. Is there a significant diference between the two.

When i was at home depot earlier today i saw an r30 insulation role which was advertsied as acoustic insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. While am not sure of the individual pricing should i make a change to r30. 90 grains might be approaching the ma.

Sixty grains even faster. Improved insulation is a good step toward improving building efficiency particularly since the atlanta based american society of heating refrigerating and air conditioning engineers ashrae increased minimum roof insulation levels in 2007 in its standard 90 1 the first increase in 18 years and if that isn t enough to spur someone into action. 30 grains of black powder will drive that lead ball just fine. Going from r 11 to r 13 just involves using a different insulation but going from r 13 to r 15 the whole wall r value for 2x6 walls requires going from 2x4 to 2x6 walls and thus more insulation more lumber and doors and windows with wider jambs.

Joined sep 27 2005 60 posts. In attics we should use additional layers of. The contractor working on my basement is going to insulate the walls with r13 insulation. Attic existing 3 4 inches of insulation uninsulated floor uninsulated wood frame wall insulated wood frame wall 1 r30 to r49 r25 to r30 r13 2 r30 to r60 r25 to r38 r13 to r19 n a 3 r30 to r60 r25 to r38 r19 to r25 and add r5 insulative wall sheathing beneath the new siding 4 r38 to r60 r38 r25 to r30.

Enter your data into the fields where indicated. Jump to latest follow status not open for further replies. Whoa whoa david oswald you ve just entered the domain of the law of diminishing returns. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy.

New homes with 2x6 walls will accommodate r19 or r21 insulation. Wall insulation whenever exterior siding is removed on an. Discussion starter 1 nov 26 2005 hi.