Attic Ventilation is Key for the Home

As summer gives way to cooler fall nights here in Connecticut, your attic becomes one of the hardest-working (and most overlooked) parts of the house. Trapped heat, lingering humidity, and poor airflow can quietly damage your roof from the inside out. The solution is simple but powerful: proper insulation and ventilation. When done right, this combination protects your roof, lowers energy costs, and delivers a return on investment that lasts for decades.

In our area, many attics are under-insulated and poorly ventilated. I still meet homeowners who want to save a few bucks by shingling over an old roof. The problem is, what you can’t see can hurt you - trapped moisture and heat can quietly rot plywood, cook shingles, and shorten a 30-year warranty roof to something far less.

Airflow is non-negotiable. A healthy attic “breathes”: fresh air in at the eaves and stale, warm, moisture-laden air out at the peak. Intake typically comes through continuous soffit vents or a product like SmartVent, which installs near the gutter line. For exhaust, modern ridge vents beat old louver (gable) vents. If you have both, keep the louvers closed - mixing systems turn those louvers into unintended intakes that only cool the top third of the attic and leave the rest to sweat it out.

Insulation and ventilation are a package deal. Ventilation manages airflow; insulation manages temperature. Fiberglass batts (yep, the pink or yellow stuff) and blown-in insulation reduce heat loss in winter and heat gain in summer. But without balanced ventilation, even the best insulation can absorb moisture, slump, and underperform - especially as temperatures swing this time of year. That’s when we see telltale signs like musty smells, rusty nails, and in cold snaps, even frost on the underside of roof decking.

A quick seasonal checklist can save you from expensive surprises:

• Make sure bath fans and dryer vents exhaust outside, not into the attic.

• Confirm continuous intake at soffits (baffles help keep insulation from blocking airflow).

• Use a continuous ridge vent for exhaust; don’t mix with open gable louvers.

• Air-seal attic penetrations (wires, pipes, light boxes) before adding insulation.

• Aim for appropriate insulation depth and even coverage, especially over the living areas.

Thinking about re-roofing? Ask your contractor for a ventilation and insulation plan - not just a shingle quote. Upgrading airflow and R-value when you replace a roof is the definition of smart timing. It protects the new shingles, preserves the roof deck, keeps comfort consistent, and trims energy costs season after season. In other words, it’s one of those un-flashy upgrades that pays you back quietly, year after year, while your neighbors wonder why their AC and furnace never seem to get a break.

As summer winds down and the furnace season creeps in, set your attic up to win. Proper insulation and ventilation will regulate temperatures, manage moisture, extend roof life, and safeguard warranties. It’s a modest upgrade with long-term dividends and comfort you can feel with savings you can count on.

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.

Ice Dam Prevention

While we haven’t had much snow this season, winter is still in full swing and this week’s freezing temperatures were a stark reminder that the worst is likely yet to come. It won’t be long before another storm rolls through to remind us why proper home maintenance is so critical this time of year. 

One common winter issue homeowners face is ice dams—and they can wreak havoc on your home if you’re not prepared. An ice dam forms when snow blankets your roof, creating an extra, unwanted layer of insulation. As warm air rises from your home into the attic, it melts the snow on your roof. The water then slides down to the eaves and gutters, where the colder surface temperatures cause it to refreeze. Over time, this process creates a growing mass of ice at the edge of the roof, commonly known as an ice dam.

These icy buildups are more than a minor inconvenience—they can cause significant damage. Heavy ice can tear gutters away from your home or even lift roof shingles, leaving gaps for water to seep into your attic. From there, leaks can spread to ceilings and walls, creating a costly mess.

The key to preventing ice dams is ensuring your home is properly insulated and ventilated. Unfortunately, many homes in our area lack adequate insulation. In fact, more than 75% of New England homes are under-insulated, allowing heat to escape straight through the roof. This problem is often a result of outdated building standards—homes built decades ago weren’t designed to handle the harsh winters of Connecticut.

By upgrading your home’s insulation and ventilation, you’ll do more than just protect your roof. A well-insulated home is more comfortable year-round, keeping you warmer in the winter and cooler in the summer. You’ll notice the difference immediately and see the impact on your energy bills too. Proper ventilation also helps reduce the risk of mold and mildew buildup, which can harm both your home and your health.

Investing in these upgrades is a simple yet powerful way to protect your family, your house, and your budget. Don’t wait for the next big storm to highlight what’s missing—take steps now to keep your home safe and comfortable all year long.

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.

Sealing Your Attic Hatchway

Many homeowners are unaware that the pull-down attic stairway is one of the primary sources of heat loss in their homes. Typically, the attic is a space we access infrequently—perhaps to retrieve holiday decorations or suitcases for a trip. Because of this, it’s easy to overlook how much temperature fluctuation occurs in the attic and just how much air escapes through this often-neglected area.

I can’t count the number of times I’ve entered an attic to find frozen water droplets clinging to the tips of roofing nails. This happens because homes often lack sufficient insulation and ventilation, causing the attic to become blistering hot in summer and freezing cold in winter. The resulting condensation can lead to significant problems like wood rot and mold growth, threatening the integrity of your home.

Heat loss, of course, is another major concern. We all know that warm air rises, and in many Connecticut homes that are underinsulated, a lot of that warmth escapes right through the attic hatch. While most homeowners apply draft strips and sealants to doors and windows, the attic entryway is frequently overlooked—even though it’s one of the most critical points for energy efficiency. The same applies to whole-house fans, which are another common area of heat loss.

One effective solution we often recommend is installing an insulated box over the attic entry or built-in house fan. These boxes are constructed from heavy-duty insulation and sealed with expanding foam. When the stairs are folded up into the attic, the box creates a secure barrier, preventing heat loss while still allowing easy access to the space. This straightforward upgrade can drastically reduce heat transfer, leading to a more comfortable and energy-efficient home.

For anyone looking to improve their home’s comfort and efficiency, I always suggest getting insulation and ventilation checked. Proper insulation is an affordable, impactful home improvement, and adding an insulated box over the attic hatch is an excellent way to complement this work for just a few hundred dollars. You’ll be amazed at the difference it makes.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a family-owned home improvement business based in Bristol since 1975. Email your questions to info@odonnellbros.com with “Ask the Pro” in the subject line. Questions may be featured in future publications. To reach Bob for your home improvement needs, call (860) 589-5155 or visit http://www.odonnellbros.com. This advice is for informational purposes only.