When it comes to upgrading insulation, Baltimore homeowners often ask the same question: Should I choose fiberglass or spray foam insulation? Both options have benefits, but the right choice depends on your home’s needs, budget, and long-term comfort goals. At Koala Insulation of Baltimore, we help homeowners understand the differences so they can make the best decision for their space.

Understanding Fiberglass Insulation

Fiberglass insulation is one of the most commonly used insulation materials in homes throughout the Baltimore area. It comes in batts or blown-in form and works by trapping air to slow heat transfer. Fiberglass is typically more affordable upfront and can be installed quickly in attics, walls, and crawl spaces.

For many Baltimore homes—especially older houses—fiberglass can be a solid option when upgrading existing insulation or topping off attic insulation. However, fiberglass does not air seal on its own. This means small gaps and cracks can still allow drafts, humidity, and outdoor air to enter your home, which can affect comfort and energy efficiency during hot, humid summers and cold winters.

Why Spray Foam Insulation Stands Out

Spray foam insulation offers a more advanced solution for homeowners looking for maximum performance. Unlike fiberglass, spray foam expands to fill cracks, gaps, and hard-to-reach areas, creating an airtight seal. This is especially beneficial in Baltimore homes where humidity control, temperature consistency, and energy savings are top priorities.

Spray foam typically has a higher R-value per inch and helps reduce air leakage, which can lead to lower energy bills and improved indoor comfort year-round. While spray foam has a higher upfront cost, many homeowners see long-term savings through improved efficiency, fewer drafts, and reduced strain on heating and cooling systems.

Which Insulation Is Best for Your Baltimore Home?

Choosing between fiberglass and spray foam insulation depends on your goals. If you are looking for a cost-effective solution to improve insulation in a specific area, fiberglass may be the right fit. If your priority is long-term energy efficiency, superior air sealing, and improved comfort throughout your home, spray foam is often the better investment.

Baltimore’s climate brings hot summers, cold winters, and plenty of moisture, making proper insulation critical. That’s why a professional evaluation is key. Koala Insulation of Baltimore offers free insulation evaluations to assess your home’s current insulation, identify problem areas, and recommend the best solution—whether that’s fiberglass, spray foam, or a combination of both.

Upgrading your insulation is one of the smartest ways to improve comfort, protect your home, and save on energy costs. When you’re ready to decide between fiberglass and spray foam, our local experts are here to help you every step of the way.