Ventilation 101: How to Keep Your Attic from Turning Into a Sauna

Most homeowners don’t think about their attic unless something goes wrong. But during the hot, humid summer months in Connecticut, poor attic ventilation can cause a lot of problems. Some you’ll feel in your cooling bills, and others you might not notice until it’s too late.

Here’s why proper attic ventilation matters and how to know if your home needs an upgrade.

Why Your Attic Needs to Breathe

Your attic should be the same temperature as the air outside. That might sound surprising, but it’s true. In the summer, without proper airflow, your attic can easily reach 130°F or higher. That heat doesn’t just stay in the attic - it radiates down into your living space, forcing your air conditioner to work harder and driving up energy costs.

Hot, stagnant air can also cause your roofing materials to age prematurely. Shingles can blister, underlayment can warp, and moisture can build up, leading to mold, mildew, and even wood rot.

Good ventilation helps control both heat and moisture, keeping your attic and roof in better shape, and your home more energy-efficient.

The Basics of a Ventilation System

A well-ventilated attic has two things: intake and exhaust. These work together to create a continuous flow of air.

• Intake vents (usually located in the soffits under your roof overhang) pull fresh air into the attic.

• Exhaust vents (at the roof ridge, gables, or high up on the roof slope) allow hot, humid air to escape.

This system relies on the natural movement of air—cool air in, hot air out.

Common Ventilation Types

• Ridge vents: Run along the peak of your roof and are often paired with soffit vents. They’re effective and barely noticeable from the street.
  Soffit vents: Located under your eaves, they bring in cool outside air.

• Gable vents: Installed on the walls of the attic, often used in older homes.

• Powered attic fans: Use electricity to actively pull hot air out. These can be helpful but aren’t always necessary if passive ventilation is working properly.

Signs of Poor Attic Ventilation

• Your upstairs rooms are always hotter than the rest of the house.

• You notice high energy bills in the summer.

• Your roof shingles are curling or deteriorating faster than expected.

• There’s mold or a musty smell in the attic.

• You see frost or condensation in the attic during winter (yes, ventilation matters year-round).

Here in Connecticut, we deal with humid summers and cold winters, which means both heat and moisture are issues. That makes proper attic ventilation even more important. It’s not just about comfort, it’s about protecting your roof, improving air quality, and saving on long-term energy costs.

If you’re unsure whether your attic is properly ventilated, a quick inspection by a professional can help. It’s one of those home systems that’s easy to overlook, until it’s not.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Got a home issue you’d like Bob to tackle? Email info@odonnellbros.com with the subject line “Ask the Pro.” To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

What To Do About Warped Siding

With Father’s Day happening this weekend and grills getting fired up all over the neighborhood, it’s a great time to talk about one of the most misunderstood siding issues I hear about: warped vinyl. Every summer, readers ask me why their siding looks “wrinkled,” even when it’s brand new. They usually blame the sun, the heat, or the frigid Connecticut winters. But here’s the kicker: warped siding isn’t a weather problem. It’s an installation problem.

The technical term for that unsightly ripple effect is “oil canning” or “stress buckling,” and it’s almost always the result of improper installation, not Mother Nature.

Vinyl siding is a fan favorite because it’s durable, low-maintenance, and looks great. But even the best-looking siding won’t hold up if it’s not put on right. Homes are built with natural materials like wood that expand and contract with the seasons. Siding needs to move with those changes. If it’s nailed too tightly, it can’t “breathe,” and that’s when it starts to buckle and warp.

Here’s another common mistake: overlapping the panels too much. It might seem like extra overlap equals extra strength, but it actually traps the siding, making it stretch and buckle when temperatures shift.

Now, back to that burning question: can the sun warp your siding? Not really. But there is one backyard culprit I’ve seen cause some serious damage: your grill. If you’re planning a Father’s Day cookout, do your siding a favor and keep that gas grill a good distance from the house. That seared steak isn’t worth melted siding.

Unfortunately, once siding starts to oil can, it needs to be replaced. Since the issue stems from how it was installed, the manufacturer’s warranty typically won’t cover it. And if your siding is a few years old, getting an exact color match might be tricky.

Bottom line: this is a job that requires know-how. Whether you’re hiring a pro or going the DIY route, make sure proper installation techniques are followed. You don’t want your home’s exterior to look like a wavy potato chip.

How to Find the Right Expert for the Job

If you’re not up for a DIY siding install (and really, who wants to spend Father’s Day up on a ladder?), here are a few quick tips to help you find a reliable contractor:

• Ask for experience specifically with vinyl siding. Not all siding is the same, and vinyl has its quirks. Make sure they’ve got a solid track record.

• Check references and reviews. Past customers are your best source of truth. Look for red flags like frequent callbacks or mention of warped siding.

• Make sure they’re licensed and insured. This protects you in case anything goes sideways, literally or figuratively.

• Ask about manufacturer certification. Some siding brands certify installers. This can improve your odds of proper installation and preserve the warranty.

• Get everything in writing. A detailed proposal should include materials, labor, timeline, and cost. If they can’t provide it, walk away.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Got a question for Bob? Email it to info@odonnellbros.com with the subject line “Ask the Pro.” Your question may be featured in a future column. For remodeling help, call O’Donnell Bros. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

Understanding Indoor Air Quality During Winter

As winter tightens its grip, homeowners often seal their residences to keep the cold at bay. While this practice conserves heat, it can inadvertently compromise indoor air quality, leading to discomfort and potential health issues. Understanding the challenges and implementing effective strategies can ensure your home's air remains fresh and healthy throughout the colder months.

Understanding the Winter Air Quality Challenge

During winter, increased use of heating systems and reduced ventilation can lead to a buildup of indoor pollutants. Common culprits include dust mites, pet dander, mold spores, and volatile organic compounds (VOCs) emitted from household products. Exposure to these pollutants may cause symptoms like headaches, dizziness, and respiratory issues, often referred to as "sick building syndrome."

Effective Strategies to Enhance Indoor Air Quality

1. Regular Ventilation: Even in cold weather, it's essential to allow fresh air to circulate. Briefly opening windows or doors can help disperse indoor pollutants. Utilizing exhaust fans in kitchens and bathrooms further aids in expelling contaminants. 

2. Maintain Optimal Humidity Levels: Aim to keep indoor humidity around 50%. Excess moisture fosters mold growth, while overly dry air can irritate respiratory passages. Using humidifiers or dehumidifiers as needed can help maintain this balance.

3. Regular HVAC Maintenance: Ensure your heating system is serviced annually. Clean or replace filters every 1-3 months to prevent dust and allergen accumulation. Consider having your air ducts inspected and cleaned to remove any built-up debris that could circulate throughout your home.

4. Consider Using Air Purifiers: Air purifiers can be a powerful tool in maintaining indoor air quality during winter. Look for models equipped with HEPA (High-Efficiency Particulate Air) filters, which are designed to capture small particles like dust, pollen, and pet dander. Many purifiers also include activated carbon filters to remove odors and VOCs from the air. Placing a purifier in frequently used spaces, like the living room or bedroom, can significantly reduce airborne pollutants and help create a healthier home environment.

5. Incorporate Indoor Plants: Certain houseplants can naturally purify indoor air by absorbing toxins and releasing oxygen. Plants like sansevieria (snake plant) are known for their air-cleaning properties and can be a beneficial addition to your home with very low maintenance needs.

6. Use Natural Cleaning Products: Traditional cleaning agents can emit VOCs, degrading air quality. Opt for natural or eco-friendly cleaners to minimize chemical exposure. Additionally, store chemicals safely and ensure proper ventilation when using them.

7. Monitor for Radon and Carbon Monoxide: Install detectors to monitor levels of these colorless, odorless gases. Regularly test and maintain these devices to ensure they function correctly, safeguarding your household from potential hazards.

8. Keep Your Home Clean: Regular dusting and vacuuming can significantly reduce indoor pollutants. Using a vacuum with a HEPA filter ensures that dust and allergens are effectively captured and not redistributed into the air.

9. Be Cautious with Scented Products: Air fresheners and scented candles can emit VOCs. Opt for unscented or naturally scented alternatives, and ensure proper ventilation when using them.

By implementing these strategies, you can maintain a healthy indoor environment during the winter months, ensuring that your home remains comfortable and safe.

Bob O'Donnell is the owner of O'Donnell Bros, Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O'Donnell Bros, Inc. at (860) 589-5155 or visit www.odonnellbros.com. Advice is for guidance only.