Attic Insulation R13 Vs R30

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.

Attic insulation r13 vs r30. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. Is there a significant diference between the two. Whoa whoa david oswald you ve just entered the domain of the law of diminishing returns. When i was at home depot earlier today i saw an r30 insulation role which was advertsied as acoustic insulation.

Insulation savings calculator use this insulation savings calculator to measure the financial impact of increasing your insulation performance. The contractor working on my basement is going to insulate the walls with r13 insulation. Enter your data into the fields where indicated. 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.

1 4 of 4 posts. The depth of the 2x4 is 3 5 inches which will accommodate r11 or r13 insulation. Existing 3 4 inches of insulation. Discussion starter 1 nov 26 2005 hi.

R13 r30 insulation big difference. 30 grains of black powder will drive that lead ball just fine. Jump to latest follow status not open for further replies. Wall insulation whenever exterior siding is removed on an.

Here s what i mean. The key is to figure out how much it s going to cost you to get those savings. Add insulation to attic. 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.

The contractor working on my basement is going to insulate the walls with r13 insulation. While am not sure of the individual pricing should i make a change to r30. In attics we should use additional layers of. 90 grains might be approaching the ma.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Sixty grains even faster. Joined sep 27 2005 60 posts.