When it comes to making your home more energy-efficient, comfortable, and quieter, insulation plays a bigger role than many homeowners realize. In Kent, WA, where we experience chilly winters, damp conditions, and mild-to-warm summers, having the right insulation can make a huge difference in how your home feels every day—and how much you spend on heating and cooling.
One of the most popular and cost-effective insulation options available today is fiberglass insulation. It has been used in homes for decades, and for good reason: fiberglass insulation is reliable, widely available, and works well in many areas of a home.
In this guest post, we’ll break down what fiberglass insulation is, how it works, where it’s best used, and why it may be the right solution for your home. If you’re considering insulating your attic, walls, crawl space, or other areas, this guide will help you make a confident decision.
What Is Fiberglass Insulation?
Fiberglass insulation is made from tiny strands of glass fibers that are woven together into a soft, fluffy material. These fibers trap air pockets, which slow down the movement of heat. This helps keep warm air inside during the winter and blocks unwanted heat from entering during the summer.
Fiberglass insulation comes in several common forms, including:
Batts and rolls (blanket insulation)
Loose-fill fiberglass (blown-in insulation)
Rigid fiberglass boards (used in specialized areas)
Because it is lightweight and easy to install in many spaces, fiberglass remains one of the most trusted insulation materials in residential and commercial buildings.
Why Fiberglass Insulation Is a Great Choice for Kent, WA
Kent homeowners often deal with damp weather, temperature swings, and heating costs that can add up quickly. Fiberglass insulation helps improve indoor comfort while lowering energy waste.
Here are some key benefits:
1. Better Indoor Comfort
Fiberglass insulation helps keep indoor temperatures steady. That means fewer cold spots in winter and less overheating during warmer days.
2. Improved Energy Efficiency
Proper insulation reduces the workload on your HVAC system. That can lead to lower heating and cooling bills over time.
3. Cost-Effective Solution
Fiberglass insulation is one of the most budget-friendly insulation choices available, making it ideal for many homeowners looking for quality results at a reasonable price.
4. Noise Reduction
Fiberglass insulation can help reduce sound transfer between rooms and from outdoors, making your living space quieter and more comfortable.
5. Fire Resistance
Fiberglass is naturally non-combustible because it is made from glass. While facing materials like paper backings can burn, the fiberglass itself does not easily ignite.
Types of Fiberglass Insulation (And Where They Work Best)
Not all fiberglass insulation is the same. Choosing the right type depends on your home layout and the areas you want to insulate.
Batts and Rolls
This is the most common type, typically installed between wall studs, attic rafters, and floor joists. It is available in different thickness levels (R-values) depending on your insulation needs.
Best for:
Attics
Exterior walls
Basements and floors
Garage walls
Loose-Fill (Blown-In) Fiberglass
Loose-fill fiberglass is installed using specialized equipment to blow insulation into cavities or attic spaces. It’s great for adding insulation to existing homes without tearing down drywall.
Best for:
Attic insulation upgrades
Hard-to-reach areas
Existing walls with proper access points
Rigid Fiberglass Boards
These boards are more dense and used in areas needing higher durability or insulation performance.
Best for:
HVAC duct insulation
Commercial projects
Areas requiring a more structured insulation material
Where Fiberglass Insulation Makes the Biggest Impact
If you want to get the most value out of your insulation project, start with the areas that lose the most energy.
Attic
The attic is one of the biggest sources of heat loss in a home. If your attic is under-insulated, warm air rises and escapes quickly during the colder months. Adding fiberglass insulation here can instantly improve comfort.
Walls
Insulated exterior walls help keep cold air out and warm air in. If your home has uneven temperatures or feels drafty, wall insulation may be needed.
Crawl Space and Floors
Many Kent homes have crawl spaces that allow cold air and moisture to rise into the living space. Fiberglass insulation under floors can reduce chilly floors and help with overall indoor comfort.
Garage
If your garage is attached and not insulated, it can affect nearby rooms—especially bedrooms or living areas above or next to it.
Common Mistakes to Avoid with Fiberglass Insulation
Fiberglass insulation is effective, but only when installed correctly. Here are a few mistakes that can reduce its performance:
Compressing the Insulation
Fiberglass works by trapping air. If it’s compressed too tightly, it loses effectiveness and reduces the R-value.
Leaving Gaps or Uneven Coverage
Insulation must fit snugly in its space without gaps. Any openings allow air to pass through and reduce energy efficiency.
Ignoring Air Sealing
Fiberglass insulation doesn’t stop air leaks on its own. For the best results, air gaps around vents, attic access points, and plumbing penetrations should be sealed first.
Poor Moisture Control
In damp areas, fiberglass insulation may require vapor barriers or moisture protection methods. Kent’s wet conditions make moisture planning especially important.
Fiberglass vs. Spray Foam Insulation: What’s the Difference?
Many homeowners ask which insulation is better: fiberglass or spray foam. The truth is both have advantages depending on the situation.
Fiberglass insulation is great for:
Budget-friendly upgrades
Large open areas like attics
Traditional wall and floor systems
Sound control improvements
Spray foam insulation is great for:
Air sealing and stopping drafts
Maximum energy efficiency
Moisture-resistant performance
Irregular or hard-to-reach gaps
At Kent Spray Foam Insulation, our team can help you choose the best option for your home—whether that’s fiberglass insulation, spray foam, or even a combination of both for the best overall results.
Signs Your Home May Need New or Updated Insulation
Not sure if your home needs fiberglass insulation? Here are some common warning signs:
High energy bills year-round
Cold rooms or uneven temperatures
Drafts even when windows are closed
Ice dams or roof issues in winter
Noisy rooms or poor sound control
HVAC system running constantly
Older insulation that looks dirty, thin, or damaged
If you notice any of these issues, an insulation inspection can help you identify the problem areas.
Final Thoughts: Fiberglass Insulation Is a Reliable Choice for Comfort and Savings
Fiberglass insulation continues to be one of the most trusted insulation materials because it’s effective, affordable, and versatile. For homeowners in Kent, WA, upgrading insulation can improve indoor comfort, reduce energy waste, and help your home stay comfortable through every season.
If you’re ready to upgrade your insulation and want expert guidance, Kent Spray Foam Insulation is here to help. Our team can evaluate your current insulation, recommend the best solution for your home, and complete the job with professional care—so you get results you can feel right away.
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