Wall, Floor, Crawlspace & Basement
The wall, floor, crawlspace & basement cluster (THERMAL insulation only): a wall insulation calculator (net area → batt bundles, cavity R), floor / crawlspace insulation cost, a rim-joist insulation quantity, basement-wall thermal insulation cost & R, and a garage wall/ceiling quantity. Waterproofing, drainage and radon are out of scope (basementcalcs / a pro).
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.
Wall insulation calculatorFind how many batt bundles a wall needs from its length, height and openings, plus the cavity R-value. Transparent formula, worked example, free, no signup.Floor / crawlspace insulation costEstimate floor or crawlspace insulation cost from your area and your own installed price per square foot, with a contingency buffer. Thermal only, free.Rim-joist insulation calculatorSize rim-joist insulation: the rim-joist area, spray-foam board-feet and kits, or rigid-foam pieces cut to the bays. Transparent formula, worked example, free.Basement-wall thermal insulation cost & REstimate basement-wall thermal insulation cost from your wall dimensions and price per ft², plus the assembly R from rigid and cavity layers. Thermal only.Garage wall/ceiling insulationFind how many batt bundles a garage needs for the walls and ceiling from their areas. Transparent formula, worked example, free. Walls and ceiling only.
Every Wall, Floor, Crawlspace & Basement 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.