When it comes to surviving the Arizona summer, your garage might be the hottest part of your home — sometimes reaching well over 120°F! Whether you use it as a workshop, gym, or extra storage, garage insulation can make a huge difference in keeping your space comfortable and energy efficient.
At AZ Insulation & HVAC Solutions, we help homeowners across Mesa, Gilbert, Chandler, and Queen Creektransform their garages into cooler, more usable spaces built for Arizona’s extreme climate.
Why Garage Insulation Matters in Arizona
Most Arizona garages are unfinished and completely uninsulated, allowing the desert heat to pour in through the attic, walls, and metal doors. That trapped heat radiates into your home and overworks your air conditioning system — especially in the afternoon.
Adding insulation to your garage can:
Lower indoor and attic temperatures by blocking radiant heat.
Protect your vehicles, tools, and stored items from heat damage.
Create a comfortable workspace or home gym you can actually use in summer.
Reduce strain on your home’s A/C and improve overall energy performance.
Best Garage Insulation Options for Arizona Homes
1. Blown-In Fiberglass Insulation (Garage Attic)
Blown-in fiberglass is affordable, clean, and fast to install — perfect for most garages with attic space above. It helps stop radiant heat before it moves into your garage and home.
We typically recommend:
7 inches of insulation for garages that aren’t cooled with an A/C or mini split system.
13.5 inches (R-38) for garages that will be cooled — this keeps conditioned air inside and maximizes energy efficiency.
2. Drill-and-Fill Wall Insulation
If your garage walls are bare or minimally insulated, drill-and-fill insulation is an excellent upgrade. Small holes are drilled between studs and filled with dense insulation material, sealing gaps that let heat in.
This upgrade can lower garage temperatures by 15–20°F on hot days and greatly reduce noise from outside.
3. Insulated Garage Doors
Uninsulated metal doors absorb and radiate heat quickly, turning your garage into a solar oven. Insulating your garage door helps regulate temperature, reduces noise, and protects stored items.
You can upgrade with insulation panels or a new insulated door for even better results.
4. Mini Split AC Systems for Garages
For homeowners who want a truly comfortable, temperature-controlled workspace, pairing insulation with a mini split system is the best choice.
Mini splits are ductless air conditioning units designed specifically for garages, workshops, and casitas, offering efficient cooling and heating without connecting to your main HVAC system.
What Size Mini Split Do You Need?
Sizing depends on your garage size and layout. Here’s a quick guide:
💡 Pro Tip: If you plan to insulate to full R-38 (13.5 inches) and seal the space properly, you may be able to size down slightly because your mini split won’t have to work as hard.
Why Choose AZ Insulation & HVAC Solutions
- Locally owned & family operated right here in Mesa, AZ
Licensed insulation and HVAC experts specializing in Arizona’s desert climate
Free inspections and professional recommendations tailored to your home
Full-service upgrades: insulation, HVAC installs, duct sealing, and mini splits
Proven results — homeowners often see a 10–25% reduction in energy costs
We make sure every project is installed to energy-code standards and designed to perform in the toughest Arizona summers.
GET A FREE ESTIMATE
Ready to Cool Down Your Garage?
If your garage feels like a furnace, it’s time to take control. Schedule your free garage insulation inspection today and let our experts help you design a setup that fits your space and your budget.
