How To Tell If Your Attic Insulation Is Bad

Allstate Exteriors • September 28, 2020

“Bad” encompasses so much. A battery can be bad; a mischievous kid can be bad, but not bad the way potato salad goes bad. What about attic insulation? How many ways can your home’s attic insulation be bad? We know at least four ways your attic insulation could be bad. We also know how to fix it. 

Age

Ah, those carefree days, decades ago, when homebuilders constructed homes with little or no attic insulation. If they did insulate the attic, they often put down some minimal roll of the cheapest stuff available.  Old insulation may not necessarily be bad insulation, but it is unlikely to be great insulation. Having a roofer examine your attic insulation is a good first step toward diagnosing insulation that has just grown too old to do the job. 

Water

Leaky roofs have to send the water somewhere, and sure as gravity keeps tugging, water keeps dripping. It drips onto your insulation, dampening it. When insulation becomes damp, it loses the air pockets that make it effective. The insulation collapses, the paper backing on batts gets soggy, and the whole mess can lead to decay, rot, mold, and mildew. Damp insulation is bad insulation. 

Thin

You can buy R-13 batt insulation. It’s thin, mostly ineffective, and cheap. It is better than no insulation, but not by much. The plain fact is, the higher the R-value of your attic insulation, the lower your energy bills. Thin insulation is bad insulation. Better than thin, low R-value batts is blown-in fiberglass insulation. It reaches all nooks and crannies, it can be piled high as needed, and it provides full coverage. 

Mold

Bad insulation may not go bad all on its own. Sometimes it is the innocent victim of bad influences, like mold and mildew. Stinky, allergen-filled mold can fester in your attic insulation and lead to health problems for your whole family. Moldy insulation is bad insulation and should be removed by a mold remediation expert.

Fix

The fix for bad insulation is to contact a reliable, local authority in great attic insulation: Allstate Exteriors. As leaders in residential roofing, the technicians at Allstate Exteriors know how to provide complete protection to your home’s roof and attic, including a perfect blanket of blown-in insulation. When you contact Allstate Exteriors, you get our full, friendly service of experienced roofers and attic insulation experts. Let us help you save money, increase home comfort, and rid yourself of bad insulation.

Westerville Homeowners: Keeping Your Roof in Top Shape

April 8, 2026
Your home is more than just a place to stash your stuff; it’s the place you’ve poured your life into. Living here in Westerville, we’re lucky to have such a great mix of tight-knit neighborhoods and quick access to everything we need. Whether you’re grabbing coffee near Uptown or taking the kids to spend an afternoon at Inniswood, you know this area is special. But let’s be honest: Ohio weather isn't always kind to our houses. Between the brutal freeze-thaw cycles in the winter and that sticky humidity we get living near the reservoir, your roof takes a beating. It’s the first line of defense for everything inside your walls.  If you’ve been spotting a few stray shingles in the yard or just have a nagging feeling that your roof is getting a bit long in the tooth, you’re in the right place. As a local roofing company, we’ve been up on enough Westerville rooftops to know exactly what makes them tick, and what tends to go wrong. Why "Local" Actually Matters There’s a big difference between a national franchise and a crew that actually lives and works here. We aren’t just reading a manual; we’ve dealt with the same storms you have. The Ohio Reality Check We don’t have mild winters here. We have "ice dam" winters. When your attic isn't venting heat properly, the snow on your roof melts, runs down to the eaves, and freezes again. That cycle can force water right under your shingles and into your insulation. If you’ve ever seen water spots on your ceiling after a winter thaw, that’s usually the culprit. On the flip side, our summers can be relentless. All that heat and humidity can lead to moss or algae growth, especially on the north side of the house where the sun doesn't hit as much. If you let that stuff sit, it eventually eats away at the grit on your shingles. Matching the Neighborhood We’ve worked on everything from the historic homes with unique angles to the newer builds in the suburbs. Every home needs a slightly different strategy. A quick patch might be fine for one house, but a total re-roofing might be the smarter, cheaper play for another. We’re not here to upsell you; we’re here to tell you what your specific roof needs to last another 20 years.

Comprehensive Roofing Services in Ohio: Expert Roof Repair, Replacement, and Installation Solutions

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Comprehensive Ohio roofing guide covering repair, replacement, and installation tips for homes and businesses. Protect your roof year-round.

Commercial Roofing Solutions for Beavercreek Businesses

March 25, 2026
 Running a business in Beavercreek, Ohio comes with its unique set of challenges and responsibilities. One of the most critical investments for any commercial property is the roof. A well-designed, high-quality roof protects your building, employees, and assets while enhancing energy efficiency and reducing long-term maintenance costs. Understanding the best options for your property is crucial, and Commercial Roofing Solutions for Beavercreek Businesses from Allstate Exteriors are designed to meet the diverse needs of local businesses throughout Greene County. From office buildings in central Beavercreek to retail centers near Wright-Patterson Air Force Base, commercial roofing requires specialized knowledge. Allstate Exteriors combines decades of experience, local expertise, and a commitment to quality to ensure that your business receives roofing solutions that stand the test of time. Why Commercial Roofing Matters for Beavercreek Businesses Commercial roofs face different pressures than residential roofs. They cover larger areas, often have more complex structures, and are exposed to frequent foot traffic during maintenance. Weather in Beavercreek adds another layer of complexity. Summer storms bring heavy rain and high humidity, while winter conditions include snow, ice, and temperature fluctuations. Over time, these elements can degrade roofing materials if not properly maintained or installed. Investing in a professional roofing system reduces the risk of leaks, structural damage, and costly emergency repairs. It also protects your employees, inventory, and customers from exposure to the elements. A well-planned roof contributes to the operational efficiency of your business and can even improve energy performance, which is increasingly important for modern commercial properties.

Seasonal Roof Maintenance Checklist for Bellbrooke Homes

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Protect your Bellbrooke, OH home year-round with Allstate Exteriors’ seasonal roof maintenance checklist. Learn expert tips, local insights, and proven strategies to extend the life of your roof and prevent costly damage.

Humid Summers & Cold Winters: Choosing the Right Roof for Baltimore, OH

March 11, 2026
Discover how Allstate Exteriors helps homeowners in Baltimore, OH choose the right roof for humid summers and cold winters. Learn about roofing materials, local climate challenges, and expert solutions designed for long-term performance.

Historic Roof Care: Preserving Ashville’s Older Homes

March 5, 2026
Ashville, Ohio is a community rich with history, character, and homes that tell the story of generations. For many homeowners throughout Ashville and neighboring communities such as South Bloomfield, Tarlton, and Canal Winchester, preserving the charm and structural integrity of these older homes is a priority. When it comes to protecting these architectural treasures, Historic Roof Care: Preserving Ashville’s Older Homes is not just a service, it is a vital investment in maintaining the legacy and value of your property. At Allstate Exteriors , we specialize in delivering expert historic roof care tailored to the unique needs of Ashville’s older homes and historic districts. In the heart of Ohio, older homes were often built with materials and methods that differ significantly from modern constructions. These roofs carry years of history and have faced decades of weather, from icy winters to humid summers. Understanding how to preserve these roofs requires more than a standard roofing service. It demands a specialized approach rooted in respect for historical craftsmanship and knowledge of local conditions in Ashville . In this post, we’ll explore practical guidance, local insights, and the reasons why trusted historic roof care from Allstate Exteriors makes all the difference for homeowners committed to preserving Ashville’s architectural heritage. Why Historic Roof Care Matters in Ashville Many homeowners in Ashville are drawn to older homes because of their distinct charm, unique character, and timeless appeal. However, historic roofs often present challenges that modern roofing systems do not. Traditional materials such as slate, cedar shake, or metal roofing installed decades ago have specific maintenance requirements. The purpose of historic roof care in Ashville is to extend the life of these roofs while maintaining their original appearance and structural integrity. Historic roofs were built in an era before modern synthetic underlayments, advanced flashing systems, and today’s wind-resistant technologies. Over time, exposure to Ashville’s seasonal climate variations can cause traditional shingles to crack, valleys to weaken, and flashing to corrode. Homeowners who postpone preservation work risk accelerated deterioration, water infiltration, and costly repairs in the future. By investing in historic roof preservation , you are protecting the original craftsmanship that makes your home unique while also enhancing long-term durability and performance. At Allstate Exteriors , we take a customized approach to historic roof care that accounts for both the architectural significance of your home and the environmental factors specific to Ashville and the surrounding areas. With decades of combined experience working with historic properties, our team is well-equipped to assess, protect, and preserve roofs that others might overlook. Whether it is a slate roof dating back nearly a century or a cedar shake roof in need of rehabilitation, we provide solutions that honor Ashville’s past while preparing your roof for the future. Understanding the Unique Challenges of Historic Roofs in Ashville Historic roofs are more than just a collection of shingles or tiles, they are an integral part of a home’s architectural identity. Because of this, the process of historic roof care in Ashville begins with understanding the distinct issues these roofs face over time. Material-Specific Challenges Slate, for example, is a beautiful, long-lasting material that can endure for over a century, but individual slates can become brittle and break. Cedar shake roofs offer natural beauty and insulation qualities, but they are susceptible to rot and insect damage if not properly maintained. Metal roofs, often found on historic barns and outbuildings in Ashville, can suffer from corrosion if protective coatings deteriorate. Architectural Complexity Many historic homes in Ashville feature steep slopes, intricate gables, and architectural bezels that create aesthetic appeal but also complicate maintenance and repairs. Without careful inspection and a preservation strategy, water can find its way into vulnerable areas such as valleys, flashing seams, and chimneys. Climate Impact Local weather patterns also play a role. Ashville’s humid summers can cause wood materials to expand, while Ohio’s cold winters bring freeze-thaw cycles that stress roofing components. Heavy rains, spring storms, and strong winds can loosen historically significant roofing elements. Allstate Exteriors’ historic roof care services include proactive measures that anticipate these challenges and address them with precision and care.