Easiest Cheapest Best Way To Insulate A Garage Door!

The speaker aims to insulate their garage door, which is the weakest link in their otherwise insulated shop, used for curing food. They emphasize balancing cost, ease of installation, and performance when choosing insulation methods. They discuss various materials and their costs per square foot, R-values, and weights. Expanding foam offers an R-value of two at under a dollar per panel, but is messy and adds 24 lbs. Fiberglass batt insulation kits provide an R-value of eight but cost $2.78 per square foot and are also heavy and difficult to install. Reflective bubble wrap is the cheapest at $0.66 per square foot with an R-value of one, but offers low performance. One and a half-inch Foamular by Owens Corning has an R-value of 7.5 for $1.24 per square foot and adds 18 lbs. The speaker concludes that 1-inch Foamular from Owens Corning is the best option, costing 89 cents per square foot, providing an R-value of five, and adding only 12 lbs to the door. Installation involves cutting the Foamular panels to fit, leaving a small gap, and then sealing the edges with expanding spray foam for a tight, monolithic seal, preventing uninsulated gaps. This method offers a good balance of cost, ease, and performance.