R30 Vs R38 Ceiling Insulation

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

R30 vs r38 ceiling insulation.

Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. Enter your data into the fields where indicated. 30 grains of black powder will drive that lead ball just fine. The rafters in cathedral ceilings are usually made the rafters in cathedral ceilings are usually made of 2x10 ft.

And owens corning ecotouch high density insulation products are designed specifically for these rafters. 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 add r5 insulated sheathing before installing the new siding 5. 90 grains might be approaching the ma. Wall insulation whenever exterior siding is removed on an.

Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. We got a quote to add more. Whoa whoa david oswald you ve just entered the domain of the law of diminishing returns. The c denotes high density materials specifically designed for installation in areas where space is limited such as cathedral ceilings.

We got a quote for r30 and r38. Here s what i mean. Our house has r10 right now. 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.

Cross section of wall insulation. I live in georgia and i believe and that is zone 1. R 30c and r 38c are available in both kraft faced and unfaced. Does anyone know what the r value of the the current insulation is and if it s worth keeping or replacing.