Spray affected plants with a ready-to-use systemic insecticide that contains acephate, imidacloprid or dinotefuran. Systemic formulas do not kill bagworms directly. The active ingredient is absorbed into plant leaves and needles, and then circulated throughout the plant. The insects die when they feed on plant parts and plant sap.
Depending on the size of your garage, insulating the walls with batts of R-13 will typically run you about $400, the ceiling $600, and the garage door will cost about $600 if you do it right (See image to the left). You can use the pink Styrofoam stuff from Home Depot, but that will only insulate your door to about R-6.
Cost breakdown. Generally, the typical home insulation costs include: 1  The Attic-according to the HomeInspectorLocator.com website the costs for insulating an attic to modern standards will run between $1 and $1.50 per square foot, though the costs increase by 100% when the insulation is one of the blown varieties. The sheathing will average around $1.02 per square foot while the R15 cavity insulation costs roughly $.73 per square foot. 2  This means that a total price of $1.75 per square foot is necessary for the purchase of the materials.