Materials & Savings
The materials & savings cluster: a fiberglass vs cellulose vs mineral-wool compare (depth & cost at a target R), a rigid-foam (EPS/XPS/polyiso) R & sheet calculator, an R/inch by material reference, an energy-savings / simple-payback estimator (from YOUR heating bill, a RELATIVE index — not HVAC sizing), and a sound / acoustic insulation quantity.
Planning estimate: this is a planning estimate from the numbers you enter — not a bid or a contract. Insulation pricing depends on material, R-value, access, prep, air-sealing, removal and local labor. Get itemized written quotes from licensed, insured insulation contractors before you commit.
Confirm coverage-per-bag, R-per-inch and set yield against the exact product you buy and order a little extra (~5–10%) for framing, gaps and settling. Coverage, R/inch and set yields vary by product and brand — read the bag/kit and the data sheet.
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.
Fiberglass vs cellulose vs mineral woolCompare fiberglass, cellulose and mineral wool for a target R-value: the depth each needs and your own cost columns, so you order the right insulation.Rigid foam R & sheet calculatorGet the R-value and 4x8 sheet count for rigid foam board (EPS, XPS or polyiso) from thickness, R per inch and area, so you buy enough sheets the first time.R/inch by material referenceLook up the labeled R-value per inch for fiberglass, cellulose, mineral wool and foam, plus the inches each one needs to hit the common R-38 and R-49 targets.Energy-savings / payback estimatorEstimate the rough annual savings and simple payback of adding insulation from your own heating bill: a relative heat-loss index, not an energy audit.Sound / acoustic insulationWork out how many batt bundles you need to sound-insulate an interior wall from the area and coverage per bundle, rounded up to whole bundles.
Every Materials & Savings tool is calculated server-side — visible immediately — with its formula, a worked example and a reference table, and works on the measurements you take and the prices you enter from your own quotes. Background reading is in the guides.