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Insulating your garage provides value if you use the space regularly or if it shares walls with your home. Garage insulation can help moderate temperature extremes, protect stored items, and create a more comfortable environment for hobbies or projects. 

The value proposition increases significantly if you plan to use your garage as a workshop, home gym, or other activity space. In colder regions, insulation also helps protect vehicles and temperature-sensitive items from extreme weather conditions.

The most economical approach to garage insulation involves using fiberglass batts, which cost between $0.30 and $1.50 per square foot for materials. For maximum efficiency on a limited budget, focus first on the walls shared with living spaces. 

Adding basic weatherstripping around doors and windows further improves thermal performance without major expense. While professional installation delivers superior results, careful DIY work can still provide meaningful improvement at a lower price point.

While garage insulation can enhance your property's appeal, it doesn't return the full project cost at resale. The value increase is most significant when the insulation creates a more versatile, usable space that appeals to potential buyers. 

Real estate professionals note that insulated garages are particularly attractive to buyers interested in workshop space, home gyms, or potential conversion opportunities. In regions with extreme temperatures, an insulated garage may become an expected feature rather than a luxury, potentially making your home more competitive in the market.