Reference tables
Look-up charts built from stable building-physics identities and labeled industry typicals — R/inch by material, IECC climate-zone target R, blown-in bags per 1,000 ft², batt coverage, spray-foam board-feet per set, rigid-board R by thickness, and installed cost per ft² by material.
Typical published planning values — NOT a certified design. Real performance depends on installation quality, framing / thermal bridging, moisture and settling; follow the product data sheet and your local energy code. Foam ignition/thermal-barrier, vapor/moisture control and combustion-air safety are set by the manufacturer and code — check with a professional.
R-value per inch by insulation materialThe signature reference: R-per-inch for every common insulation, the inches needed to reach R-30/R-38/R-49, and a labeled installed cost band — a neutral, cross-material data asset.IECC climate-zone target R-value by assemblyLabeled IECC/ENERGY STAR target R by climate zone for attic, wall cavity and floor — the reference behind the climate-zone tools.Blown-in insulation bags per 1,000 ft² by target RHow many bags of blown fiberglass 1,000 ft² takes at each target R, from the labeled coverage-per-bag-at-R chart — behind the blown-in and attic bag calculators.Batt insulation coverage per bundle by R-valueLabeled batt coverage (ft² per bundle) by R-value — the conventions behind the batt and wall calculators.Spray-foam board-feet yield per kit / setLabeled board-feet yield per DIY kit and pro set (open vs closed cell) — behind the spray-foam board-feet and set/kit tools.Rigid foam board R-value by thickness (EPS/XPS/polyiso)Labeled rigid-board R-value by thickness for EPS, XPS and polyiso — behind the rigid-foam calculators.Insulation cost per square foot by material (installed)Labeled installed cost bands per ft² by material (batt, blown-in, cellulose, mineral wool, foam, rigid) — a sanity guide behind the cost tools.