Is R19 Insulation Good For Attic

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

Is r19 insulation good for attic.

If you re building a house and want to have a really good building enclosure you need it to be airtight handle moisture properly and have a good amount of insulation. Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists. R value is a measure of insulation s ability to resist heat traveling through it. If the attic doesn t have any insulation use faced insulation with the vapor barrier facing toward the living space and cut the batts to fit in the space between the ceiling joists.

Ideally you d also consider the effects of solar radiation on the home but for now let s just focus on the insulation. Attic 4 basement 5 ceiling insulation 17 crawlspace 20 floor 31 faced or unfaced. The higher the r value the better the thermal performance of the insulation. For diy attic insulation you ve got two choices.

If your attic doesn t have any insulation used faced insulation placing it in the space between the joists with the paper side facing down toward the heated livings space. Good for layering additional insulation in attic. 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 add r5 insulated sheathing before. 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.

Insulation level are specified by r value. If the attic already has a layer of insulation up to the top of the joists use unfaced insulation with the new batts installed perpendicular to the joists. Because r 19 insulation is just over 6 inches thick it is well suited for use in construction projects that use 2 by 6 inch lumber. Once you ve decided which type is best for you examine the material options and prices to home in on the right product.

Loose fill or batt the common term for blanket insulation. A different type of insulation is used in areas like basements and attics and to insulate floors. It fits tightly in the wall and prevents air from flowing through gaps in the plywood on the walls. The table below shows what levels of insulation are cost effective for different climates and locations in the home.