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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Blower Door Test

By Mattra Inc • April 3, 2025
Is Your Home Under-Insulated and Leaky? A Blower Door Test Can Tell You Many Maine homeowners don’t realize just how much money is flying out the window—literally. Drafty rooms, cold floors, and rising energy bills are often signs of poor insulation and hidden air leaks. But how do you know where your home is losing heat? A blower door test is one of the most effective tools to identify under-insulated and under-sealed areas in your home. Let’s explore how it works, why it matters, and what steps you can take to improve your home’s energy efficiency—and unlock valuable Efficiency Maine rebates in the process. What Is a Blower Door Test? A blower door test uses a powerful fan, mounted into an exterior doorway, to pull air out of your home and lower the indoor air pressure. This forces outside air in through any cracks or gaps in the building envelope. The result? A clear picture of where your home is leaking air. This test measures air changes per hour (ACH) and identifies weak points in insulation and air sealing. It helps assess how well your home keeps conditioned air in—and the outdoor elements out. An experienced technician can use this data to recommend targeted upgrades, saving you money on heating and cooling costs. How to Pass a Blower Door Test: Key Air Sealing Tips Passing a blower door test doesn’t require a full renovation—it’s about sealing the right places effectively. Here are the most common areas to focus on: 🪟 Windows and Doors Install weather stripping Use caulk or foam sealant around frames Check for gaps in thresholds or broken seals 🧱 Attics and Ceilings Seal around light fixtures and access hatches Insulate attic floors and rafters Use foam board or spray foam in hard-to-reach corners 🧰 Basements and Crawlspaces Seal rim joists with spray foam Insulate basement walls and floors Cover and seal crawlspace vents and doors 🧹 Floors and Walls Fill gaps around pipes, wiring, and ducts Seal baseboards and floor edges Add insulation in wall cavities if accessible By addressing these common problem areas, you can drastically improve your blower door test results and the overall comfort of your home. Why Blower Door Testing Matters Blower door tests aren’t just for code compliance—they’re a diagnostic tool to understand your home's efficiency. When performed by professionals, these tests: Reveal hidden air leaks Provide data for insulation and air sealing improvements Help reduce energy bills Improve indoor comfort and air quality Support home energy audit documentation During the test, technicians record the building's air leakage rate using calibrated gauges. Smoke pencils or infrared cameras may also be used to visualize the leaks. This ensures your energy upgrade dollars go exactly where they’re needed most. Mattra Handles It All—Testing, Air Sealing, and Insulation Ready to make your home more energy-efficient? Mattra offers professional blower door tests. At Mattra, we don’t just tell you what needs to be fixed—we do the work for you. As a licensed insulation and air sealing contractor, we can take your blower door test results and turn them into real improvements. From sealing drafty basements to upgrading attic insulation, our team handles every step in-house. That means fewer headaches for you—and faster results. Plus, we’ll help you navigate the Efficiency Maine rebate process , so you can maximize your savings without lifting a finger. One test. One team. One solution. Let Mattra make your home warmer, tighter, and more energy efficient—starting today.

5 Summer Preparation Tips

By Mattra Inc • June 19, 2024
Introduction As summer approaches in Maine, homeowners often face challenges with under-insulated homes, skyrocketing air conditioning costs, and the lurking threat of mold growth. These issues not only impact comfort but can also lead to increased energy bills and health risks. Ensuring your home is properly prepped for the warmer months is essential for maintaining a comfortable, safe, and energy-efficient living environment. In this comprehensive guide, we will explore effective strategies for insulating your home, understanding and mitigating the dangers of mold growth, and taking advantage of financial incentives to make your home summer-ready. How to Properly Insulate Your Home Insulating your home is one of the most effective ways to improve energy efficiency and maintain a comfortable indoor temperature during the hot summer months. Proper insulation not only reduces cooling costs but also helps to keep your home warm during the harsh Maine winters. Understanding Insulation Types There are several types of insulation available, each with its own advantages. The most common types include: Fiberglass Insulation: Made from fine glass fibers, this type is commonly used in attics and wall cavities. Spray Foam Insulation: A versatile option that expands to fill gaps, providing excellent air sealing and insulation. Blown-In Insulation: Often made of cellulose or fiberglass, it is blown into place using special equipment, ideal for adding insulation to existing structures. Benefits of Spray Foam Insulation Spray foam insulation is particularly effective for Maine homes due to its superior insulating properties and air sealing capabilities. It helps to prevent air leaks, reduces energy bills, and provides a barrier against moisture, which is crucial in preventing mold growth. Additionally, spray foam can reach areas that other insulation types might miss, ensuring comprehensive coverage. DIY Tips for Home Insulation For those who prefer a hands-on approach, here are some DIY tips to improve your home’s insulation : Seal Gaps and Cracks: Use caulk or weatherstripping to seal gaps around windows, doors, and other openings. Add Insulation to the Attic: Consider using blown-in insulation for an easy and effective way to enhance your attic’s insulation. Install Reflective Barriers: Reflective barriers can be added to attic spaces to reduce heat gain. Insulate Pipes and Ducts: Wrap pipes and ducts with insulation to prevent heat loss and improve efficiency. While these DIY methods can be effective, professional installation of spray foam or blown-in insulation offers a more thorough and long-lasting solution. Professional installers have the expertise and equipment to ensure your home is optimally insulated. The Dangers of Mold Growth and Its Effects on You and Your Pets Mold growth is a common problem in many homes, particularly in regions with high humidity like Maine. Mold not only damages property but also poses significant health risks to both humans and pets. How Mold Grows in Maine Homes Mold thrives in damp, humid environments, making under-insulated and poorly ventilated areas in your home prime targets. Common areas for mold growth include basements, bathrooms, kitchens, and attics. During the summer, increased humidity levels can exacerbate mold problems, especially if there is poor air circulation or water leaks. Health Risks for Humans Exposure to mold can cause a variety of health issues, including: Allergic Reactions: Symptoms such as sneezing, runny nose, red eyes, and skin rashes. Respiratory Problems: Mold spores can cause asthma attacks and other respiratory issues, particularly in individuals with pre-existing conditions. Toxic Effects: Certain types of mold, such as black mold, can produce mycotoxins that are harmful when inhaled, potentially leading to severe health problems. Health Risks for Pets Pets are also susceptible to mold-related health issues. Symptoms in pets can include: Respiratory Distress: Coughing, wheezing, and difficulty breathing. Skin Irritations: Itchy skin, rashes, and fur loss. Digestive Problems: Vomiting and diarrhea if mold-contaminated food or water is ingested. Preventing mold growth is crucial for maintaining a healthy home environment. Ensuring proper insulation, ventilation, and addressing any water leaks promptly can help mitigate the risk of mold. Take Advantage of a Free Inspection and Estimate One of the best steps you can take to prep your home for summer is to get a professional inspection and estimate. This not only helps identify areas that need improvement but also ensures you are making informed decisions about home upgrades. Efficiency Maine’s Rebate Program Maine homeowners have access to fantastic financial incentives through Efficiency Maine’s rebate program . This program offers: Minimum 40% Rebate: On qualifying home insulation projects. Up to 100% Rebate: For income-eligible households, making energy efficiency upgrades accessible to everyone. By taking advantage of these rebates, you can significantly reduce the cost of insulating your home, making it more affordable to improve comfort and energy efficiency. Your Estimate and Rebate Ready to make your home summer-ready? Don’t wait! Fill out our Get Started form or call us at (207) 777-6020 to schedule your free inspection and estimate today. With Efficiency Maine’s rebates, you can save big while ensuring your home is comfortable, energy-efficient, and mold-free.