Is R30 Insulation Good For Attic

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.

Is r30 insulation good for attic.

Wall insulation whenever exterior siding is removed on an. Some attic floors that already have a layer of insulation could benefit from an additional application over the existing layer. Higher priced r30 insulation typically offer more durable material extended warranties and enhanced appearance and finish options. Existing 3 4 inches of insulation.

Depends on type of insulation and how it is installed. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Reduce total project cost by having multiple vendors bid on the same detailed work specification of your r30 insulation project. If using batt insulation between the rafters in the attic you probably end up with open space between each batt above the rafters.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. Inspecting your attic insulation. Add insulation to 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.

The extra batting increases r values so it further slows warm air. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. You also don t see any gaps that allow you to see all the way down to the ceiling drywall. Notice how you don t see any of the ceiling framing down at the ceiling level.

For loose fill cellulose this translates to a total depth ranging from 8 inches. Since you are looking at r38 r30 i assume this is an attic. That s because blown insulation is great at filling the gaps and giving you a good complete layer of. 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.

Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.