Top 3 Home Insulations: Spray Foam, Blown-in Cellulose, & Fiberglass

Introduction


Choosing the right insulation for your home is not just a matter of cost—it's about comfort, energy efficiency, and creating a sustainable living environment. Inadequate insulation leads to energy waste, higher utility bills, and discomfort during extreme temperatures. Additionally, poor insulation can contribute to moisture accumulation, fostering mold growth that can compromise indoor air quality and structural integrity.


This article will explore the top three insulation types: spray foam, blown-in cellulose, and fiberglass, with a particular emphasis on why spray foam and blown-in cellulose might be the superior choices for most homes. Both options provide excellent moisture control, preventing mold while ensuring your home stays warm in winter and cool in summer.


Spray Foam Insulation: Enhancing Home Efficiency and Strength


Overview of Spray Foam


Spray foam insulation is a product that expands and hardens upon application, creating a tight thermal envelope around your home. It comes in two main types: open-cell and closed-cell, each serving different insulation needs but with the closed-cell variant being notable for its moisture barrier properties and higher R-value.


Benefits of Spray Foam


Spray foam stands out as the best insulation option due to its expansive nature that tightly seals all nooks and crannies where it's applied. Unlike traditional materials, spray foam expands upon application, filling even the hardest-to-reach areas and creating an airtight seal. This capacity makes it ideal for use in areas other insulations can't effectively cover, such as around piping, in attics, or in crawl spaces.


Importance of Thickness and Density


The effectiveness of spray foam insulation largely depends on the correct application of thickness and density. Proper installation ensures optimal performance, maximizing its R-value (the measure of thermal resistance) and ensuring that the home is well-protected against temperature fluctuations.


Closed-Cell Benefits


Closed-cell foam is particularly beneficial for enhancing the structural integrity of buildings. It adds rigidity and strength to the walls, with studies showing that it can increase a structure's resistance to wind and pressurization by up to 400%. This makes it an excellent choice for areas prone to severe weather conditions.


Application Process


Applying spray foam requires professional installation as the chemicals need careful handling and precise mixing during application. It is sprayed into open wall cavities, attics, and under floors, where it expands and hardens, forming a permanent barrier.


Blown-In Cellulose: Perfect for Retrofitting and New Builds


Blown-in cellulose insulation is a type of insulation material made from recycled paper products, primarily newsprint, that is treated with fire retardants. It is installed by blowing the loose material into wall cavities, attic spaces, or between floors using special pneumatic equipment. This method allows for the insulation to fill in gaps and spaces thoroughly, making it ideal for retrofitting existing structures and enhancing energy efficiency by providing an effective barrier against heat transfer and sound.


Appropriate Uses


Blown-in cellulose is often recommended for older homes where minimal invasiveness is crucial. It's also effective for new construction, particularly when looking to utilize an eco-friendly insulation solution that still provides excellent thermal and acoustic performance. Cellulose is applied generally at a depth of 18” or R60


Benefits of Blown-in Cellulose


Made from recycled paper products, cellulose is an environmentally friendly option. It performs well both thermally and acoustically, making it a preferred choice for homeowners concerned with energy conservation and noise reduction. Cellulose is a blend of recycled newspaper and boric acid ‘soap’ that acts as a fire retardant, dry's the exoskeletons of insects and gets in the eyes of rodents repelling them.


Application Process


Professional equipment is used to blow the cellulose into wall cavities, attic spaces, and other needed areas. This method ensures even distribution and proper density, which are critical for optimal performance.


Fiberglass Insulation: An Economical, DIY-Friendly Choice

DIY Application


Fiberglass batts are well-suited for DIY projects due to their ease of handling and installation. Homeowners can cut the batts to fit various spaces without the need for specialized equipment. Fiberglass batts do not create a uniform and consistent blanket like cellulose does.


Comparative Effectiveness


While fiberglass is cost-effective and easy to install, its insulation quality is generally lower than that of spray foam or cellulose. Graphical comparisons of R-value per inch often show fiberglass as having lower thermal resistance, making it less effective in extremely cold or hot climates. There can be many thermal breaks and places for air to escape between batts.


Limitations of Fiberglass


Fiberglass is less effective at preventing air leakage compared to other types. It must be meticulously installed to cover gaps completely, which can be challenging in irregular spaces.


Application Process


Fiberglass is typically installed between studs, joists, and beams. It must be cut to fit snugly around obstacles and taped or sealed to prevent air gaps.


Upgrade Your Home Insulation with Mattra


Improving your home's insulation is an investment in comfort, energy efficiency, and long-term savings. At Mattra, we understand the unique challenges posed by Maine's climate and are dedicated to helping you find the perfect insulation solution.


Contact us today through our get-started form or call us at (207) 777-6020 for a free quote. Remember, with Efficiency Maine's rebates, you could qualify for at least 40% off, and potentially up to 100% off, the cost of upgrading your home's insulation. Don't miss out on these fantastic savings—reach out now to see how much you can save!

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By Mattra Inc September 16, 2025
September in Maine: It's Time to Get Ready for the Cold The air is getting crisp, the days are getting shorter, and that first real chill of September is a reminder that winter is right around the corner. If you're anything like us, you're not exactly looking forward to those high heating bills. You’re probably picturing a drafty living room, cold floors, and that thermostat you keep nudging higher and higher just to feel comfortable. But what if you didn't have to? This isn't about just surviving another Maine winter; it’s about thriving. It’s about being truly comfortable in your own home, without the constant stress of watching your energy costs climb. The secret? Proper insulation and air sealing. Investing in your home's insulation now is the smartest thing you can do. It’s like putting money in the bank. You spend a little up front to save a lot later. We’ve seen it time and again—homeowners can slash their energy consumption by as much as half. Imagine what you could do with that extra cash every month. Our Solutions for a Warmer, Cozier Home At Mattra, we know what a Maine winter demands. That’s why we offer solutions that actually work. Closed Cell Spray Foam - This is our top-tier solution, and it’s a game-changer for a home’s efficiency. When applied, this foam expands into a dense, rigid material that creates an incredible air and moisture barrier. We use it to seal crawl spaces, basements, and exterior walls. Think about that cold basement feeling—spray foam completely eliminates it. By sealing those critical areas, you prevent a tremendous amount of heat loss and stop cold, damp air from entering your living space. This is more than just insulation; it's a complete building envelope upgrade that also adds structural integrity and helps prevent moisture issues and mold growth. It's the ultimate defense against the Maine elements. Blown-In Cellulose - Made from recycled paper products, blown-in cellulose is one of the most eco-friendly insulation options available. We use a powerful hose to blow the material into attics and enclosed wall cavities. The tiny paper fibers pack together to form a seamless blanket of insulation, leaving no gaps for air to escape. It's especially effective in attics, where heat naturally rises and escapes. A properly insulated attic can be the single biggest factor in lowering your heating costs. Beyond its thermal performance, cellulose also has excellent sound-dampening qualities, making your home quieter and more peaceful by blocking out exterior noise. Dense Packing Walls - For older homes that were built without any wall insulation—a common issue in Maine—dense packing is a perfect solution. Instead of tearing down all your interior walls, we can drill small holes and inject cellulose or other materials directly into the wall cavities. This fills every empty space behind your drywall or plaster. The material is packed in so tightly that it significantly reduces drafts and heat loss. It's a non-invasive way to bring an old home's energy performance up to modern standards, drastically improving comfort and saving you money without the mess and high cost of a full renovation. Targeted Air Sealing - Insulation is only half the battle. You could have the best insulation in the world, but if air is leaking in and out of your home, you're still wasting energy. We specialize in using foam to meticulously air seal the two biggest culprits for drafts: your basement and your attic. We target the penetrations where pipes, wires, and framing meet, which are often the main pathways for air leakage. By sealing these critical areas, we prevent the "stack effect," where warm air rises and escapes from the top of your house, pulling cold air in from the bottom. Sealing these areas with foam is a fundamental step that makes all other insulation work more effectively, ensuring your home holds onto the heat you’re paying for. This Is Where It Gets Even Better: Rebates! As a licensed vendor with Efficiency Maine , we can help you access substantial rebates for your weatherization project. This isn't just a small discount—we're talking about real money that makes a huge difference. You are entitled to at least $4,000 in rebates for your project, with the potential for even more depending on your income. We will personally guide you through the process, ensuring you receive every dollar you're entitled to from these incredible programs. This makes an already smart financial decision an absolute no-brainer. Don't wait for winter to sneak up on you. Let's make this year different. Reach out to us at Mattra today for a free consultation. We’d love to help you make your home the comfortable, energy-efficient sanctuary it should be.
By Mattra Inc August 18, 2025
That musty smell. The faint water stains on your attic ceiling. Maybe you’ve even spotted some unwelcome dark spots. If you’re a Maine homeowner, especially in our older homes, these could be signs of a serious problem brewing in your attic: condensation leading to mold growth. It's a more common issue than you might think, and it can have significant consequences for your home’s health and your wallet. Why is your Maine attic suddenly feeling like a rainforest? The culprit is often a perfect storm of factors we see frequently here at Mattra: a lack of proper air sealing and insufficient insulation. Think of your warm, humid indoor air rising into the colder attic space. Without proper air barriers, this warm, moisture-laden air sneaks through cracks and openings around wiring, plumbing, and light fixtures. Once this warm, moist air hits the cold surfaces in your uninsulated attic – like the roof sheathing – it cools rapidly. Just like water beading on a cold glass on a summer day, this cooling air releases its excess moisture in the form of condensation. And in a Maine winter, those surfaces stay cold for a long time! Several other common issues exacerbate this problem. That uninsulated attic hatch? It’s a direct pathway for warm, humid air to escape. An uninsulated chimney acts as another cold surface where condensation can form. And those bathroom and dryer vents that aren’t properly ducted to the outside? They’re pumping even more moisture directly into your attic – a recipe for disaster. So, what happens when all this condensation builds up? That’s where mold enters the picture. Mold spores are everywhere, both indoors and out. They thrive in damp, dark environments with organic materials to feed on – like the wood in your attic. Consistent condensation provides the perfect breeding ground. As mold grows, it doesn't just create unsightly stains and that telltale musty odor. It actively deteriorates the materials it grows on. Over time, mold can weaken the structural integrity of your roof sheathing and rafters, leading to costly repairs. It can also damage any stored items in your attic. Beyond the structural damage, mold growth can also impact your indoor air quality. Mold spores can become airborne and circulate throughout your home, potentially triggering allergic reactions, asthma symptoms, and other respiratory issues for you and your family. As a licensed vendor with Efficiency Maine , we understand the importance of a healthy home environment. The good news? These attic issues are often fixable! Proper air sealing prevents that warm, humid air from entering the attic in the first place. Adequate insulation helps maintain a more consistent temperature in the attic, reducing those cold surfaces where condensation forms. Insulating the attic hatch and chimney are crucial details often overlooked. And ensuring your bathroom and dryer vents are correctly ducted to the exterior is essential for removing excess moisture from your home. Addressing attic condensation and mold growth is an investment in your home's long-term health and your family's well-being. If you suspect you have an issue in your Maine attic, don't wait for the problem to worsen. Contact the experts at Mattra right here in Lewiston. We can assess your attic, identify the sources of condensation, and recommend the best solutions for mold remediation and preventing future problems through proper air sealing and insulation. Protecting your Maine home starts from the top down!