Why Your Garage Is Freezing (And Costing You a Fortune), 8 Mistakes

Your garage might be the most expensive room in your house — and you're not even using it. Every month heat pours out through those uninsulated walls, and you pay for it on every energy bill. These are the 8 garage insulation mistakes quietly destroying your energy bills — and how to fix each one. In this video: 🔴 Only insulating the garage door (door kits have almost no impact — walls and ceiling are what move your bills) 🔴 Using bare fiberglass with no air sealing (air leaks = 25–40% of heating and cooling costs) 🔴 Ignoring moisture and the vapor barrier (wet fiberglass loses up to 50% of its R-value and grows mold) 🔴 Creating a double vapor barrier (the most common risky error ,traps moisture and rots your walls) 🔴 Choosing the wrong insulation for the space (fiberglass R-2.9–3.8/in vs closed-cell R-6–7/in) 🔴 Ignoring your climate zone R-value (too little wastes comfort, too much wastes cash) 🔴 Compressing insulation and leaving gaps (crushed insulation loses the R-value you paid for) 🔴 Insulating an unbalanced or unconditioned garage (insulation alone traps humidity — it's a system, not a product) Whether you're insulating a garage for the first time or fixing a job that failed, this gives you the verified 2026 data before you spend a dollar.