How Much Insulation Does a Home in Virginia Need?
Virginia’s IECC climate zone map has a clear default: zone 4A applies to almost every county in the state, with 19 counties shifted to zone 3A and 5…
How Much Insulation Does a Home in Vermont Need?
Vermont sits entirely in IECC climate zone 6A, so every county uses the same insulation row: attics need R60 if uninsulated (or R49 if topping up…
How Much Insulation Does a Home in Utah Need?
Utah has no single insulation number because it doesn’t sit in a single climate zone.
How Much Insulation Does a Home in Texas Need?
Texas covers six different IECC climate zones, so there’s no single R-value that fits the whole state.
How Much Insulation Does a Home in Tennessee Need?
Tennessee sits across two IECC climate zones, 4A and 3A, and that split is the whole reason there’s no single R-value answer for “a home in Tennessee.” A…
How Much Insulation Does a Home in South Dakota Need?
South Dakota’s 66 counties split across two IECC climate zones, but that split doesn’t actually change the insulation numbers much: both zones land on…
How Much Insulation Does a Home in South Carolina Need?
South Carolina spans two IECC climate zones, so the right amount of insulation depends on where a house sits.
How Much Insulation Does a Home in Rhode Island Need?
The whole state of Rhode Island falls into IECC climate zone 5A, which means one row of the ENERGY STAR retrofit table applies statewide: R60 for an…
How Much Insulation Does a Home in Pennsylvania Need?
Pennsylvania sits across two federal climate zones, 5A and 4A, which means the correct insulation level depends on which zone a given county falls into…
How Much Insulation Does a Home in Oregon Need?
Oregon doesn’t have one insulation answer. The state splits across two IECC climate zones, and each has its own row on the ENERGY STAR retrofit table.