Attic Insulation Zone Map

The amount of attic cavity ventilation is specified by numerous ratios of free vent area to insulated ceiling area ranging from 1 150 to 1 600 depending on which building code is consulted the 1 300 ratio being the most common.

Attic insulation zone map. For over 50 years insulfoam has been enabling building professionals to construct high quality building insulation systems at a minimal cost. Add r5 insulative wall sheathing beneath the new siding. The map and chart show each region of the u s the subsequent zones and corresponding r values. There are many ways to retrofit a home with fiberglass and mineral wool insulation.

Alaska is in zones 7 and 8. Whenever exterior siding is removed on an uninsulated wood frame wall. R values for walls represent the sum of cavity insulation plus insulated sheathing if any. Add r5 to r6 insulative wall sheathing beneath the new siding.

Hawaii is in zone 1 for more specific information check with your town s building department. It also suggests. Wall insulation whenever exterior siding is removed on an. Insulfoam is a division of carlisle construction materials a wholly owned subsidiary of carlisle companies nyse.

Chart and image source. The map and chart below show the approximate amount of attic insulation you should have based on the zone in which you live. Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. Zone attic floor wall uninsulated 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.

Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. The second r value for mass walls applies when more than half the insulation is on the interior of the mass. Recommended levels of insulation. Add r5 to r6 insulative wall sheathing beneath the new.

Department of energy doe and the international energy conservation code iecc. R value insulation chart 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. By zone as indicated in the map of the united states. Add r5 insulative wall sheathing beneath the new siding.

How much attic insulation you need. This map shows thermal recommended levels of insulation for various climate zones based on recommendations from the u s.