Don’t Forget About This Part of Your New Home Now So You Can Save Energy, Money Later

Don’t Forget About This Part of Your New Home Now So You Can Save Energy, Money Later

While a new construction or custom-built home should already include insulation standards that meet local and federal building codes, there are instances when homeowners can enjoy even greater benefits by adding additional or enhanced insulation. This is especially true for one of the least insulated sections of most homes: the garage.

Taking the time to properly plan the insulation of your new garage prior to construction can lead to tangible savings on utility costs and create a more functional, multi-purpose space for your family.

Why Worry About Insulating a Garage?

Originally intended for automobile storage, garages are now used for workshops, laundry centers, and storage. These uses may be impacted by seasonal temperature fluctuations, as garages are rarely included in a home’s main HVAC system. Enhanced insulation helps ensure your garage can support diverse activities year-round.

Garage Insulation Basics

Many builders finish garage walls with drywall or sheetrock, which provides visual appeal and additional insulation. For garages with attics or bonus rooms above, ceilings are often finished to meet building codes. Always confirm the type and R-Value of insulation your builder plans to use. Including upgrades during initial construction is more cost-effective than retrofitting later.

The Details: Insulation Materials and R-Value

Fiberglass

Fiberglass insulation is sold in rolls (batts) and is easy to install between wall studs or ceiling joists. Its R-Value (thermal resistance rating) typically ranges from 2.2 to 3.2 per inch. Homes in extreme climates may require thicker batts with higher R-Values.

Cellulose

Made from recycled newspaper and fire-retardant materials, cellulose is blown into wall cavities. It offers a higher R-Value (3.6 per inch) and better airflow prevention than fiberglass.

Spray Foam

Spray foam provides the highest R-Value (6.0 per inch), making it ideal for maximum insulation with less material. Though costlier, it’s popular for high-efficiency builds.

Utility Cost Savings From Improved Garage Insulation

For attached garages, proper insulation reduces heat transfer through shared walls, easing the load on your HVAC system. Even for detached garages with separate heating/cooling systems, enhanced insulation stabilizes temperatures and lowers energy use.

Note: Insulation alone cannot regulate temperatures. If using the garage as a laundry room or workspace in extreme climates, consider adding a supplemental HVAC system.

Don’t Forget the Garage Door!

Standard garage doors often lack sufficient insulation. Opt for models with higher R-Values, which feature thicker foam cores between steel or plastic layers. DIY insulation kits are also available for budget-conscious homeowners. Discuss door upgrades with your builder to optimize energy efficiency.