Attic Insulation Zone Map

Add r5 to r6 insulative wall sheathing beneath the new.

Attic insulation zone map.

Hawaii is in zone 1 for more specific information check with your town s building department. Whenever exterior siding is removed on an uninsulated wood frame wall. The second r value for mass walls applies when more than half the insulation is on the interior of the mass. The map and chart show each region of the u s the subsequent zones and corresponding r values.

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. How much attic insulation you need. Add r5 insulative wall sheathing beneath the new siding.

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. 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. Add r5 to r6 insulative wall sheathing beneath the new siding.

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. There are many ways to retrofit a home with fiberglass and mineral wool insulation. 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. Alaska is in zones 7 and 8.

Chart and image source. It also suggests. By zone as indicated in the map of the united states. Recommended levels of insulation.

R values for walls represent the sum of cavity insulation plus insulated sheathing if any. Insulation iecc sections 303 1 4 and 402 insulation r values are minimum acceptable levels and must be determined according to ftc rule. Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. Insulation zone map lack of the floor attic insulation house top floor ceiling or inadequate amount of the insulation are definitely some of the most important reasons responsible for migration of conditioned hot or warm air into the attic.

For over 50 years insulfoam has been enabling building professionals to construct high quality building insulation systems at a minimal cost. This map shows thermal recommended levels of insulation for various climate zones based on recommendations from the u s.