Is Fall Mold Creeping Onto Your Roof

As the crisp autumn air settles in and the leaves start to fall, most homeowners are focused on pumpkin decor and raking their yards. But there’s something sneaky that may be settling in overhead: roof mold. Yes, fall is prime time for mold to make itself at home on your shingles, and ignoring it could lead to bigger (and more expensive) problems down the road.

Let’s break down what roof mold is, why it thrives in the fall, and what you can do to kick it to the curb before it spreads.

Why Fall Is Mold’s Favorite Season

Mold is a fungus that loves moisture, shade, and organic debris - all of which come together perfectly during autumn in New England. Here’s why:

• Falling Leaves: Leaves that land on your roof can trap moisture and block sunlight, creating damp, shaded pockets where mold thrives.

• Cooler Temperatures: As temperatures drop, homeowners may not notice excess moisture buildup because it’s not evaporating as quickly.

• Shorter Days: Less sunlight means less natural drying power for your roof.

• Clogged Gutters: Leaf-filled gutters lead to poor drainage and water pooling on the roof. Mold eats this up, literally.

What Mold Does to Your Roof (It’s Not Just Ugly)

Roof mold might seem like just a cosmetic issue, until it isn’t. Here’s what can happen if mold takes hold:

• Shingle Damage: Mold can deteriorate asphalt shingles and shorten your roof’s lifespan. It eats away at the granules that protect your roof from UV rays and weather damage.

• Wood Rot: If moisture seeps beneath the shingles, it can lead to rotting of the underlying wood structures, threatening your roof’s structural integrity.

• Insulation Issues: Mold creeping into your attic or insulation can ruin energy efficiency, sending your heating bills through the roof - pun intended.

• Health Concerns: Mold spores can make their way into your home’s air, potentially triggering allergies, asthma, or other respiratory issues for your family.

How to Stop Fall Mold Before It Starts

The good news? Roof mold isn’t inevitable. With a little proactive maintenance, you can keep your roof mold-free all season long. Here’s how:

1. Clean Your Roof (and Gutters)
   Leaves, twigs, and debris are mold’s favorite housewarming gifts. Clear your roof and gutters regularly, especially after a big wind or rainstorm.

2. Check Your Attic Ventilation
   Poor airflow in the attic can trap moisture and encourage mold growth from the inside out. Make sure vents are clear and consider installing an attic fan if airflow is limited.

3. Trim Back Overhanging Branches
   Shade is great for picnics, not for roofs. Cutting back branches allows more sunlight to hit your roof and dry up any lingering moisture.

4. Inspect for Leaks and Damaged Shingles

   Take a walk around your home and look for signs of water damage, cracked shingles, or dark streaks. If you spot anything suspicious, call in a pro.

5. Consider Copper or Zinc Strips
   These metal strips, installed near the peak of your roof, naturally kill mold and algae as rainwater washes down over them. It’s a smart investment for long-term mold prevention.

6. Book a Professional Roof Inspection
   Fall is an ideal time to have a professional take a look. They can spot early signs of mold or damage you might miss from the ground.

When in Doubt, Call It Out

If you already see mold growing on your roof, don’t panic, but don’t ignore it either. DIY solutions may help with small patches, but for widespread or stubborn growth, it’s best to bring in the experts. Professional mold removal will ensure it’s safely and thoroughly taken care of, without damaging your roof in the process.

A clean, mold-free roof isn’t just about curb appeal. It’s about protecting your investment, your home’s structural integrity, and your family’s health. So this fall, while you’re sipping cider and enjoying the foliage, take a few minutes to look up. Your roof might be trying to tell you something.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions 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 http://www.odonnellbros.com. Advice is for guidance only.

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.

How to Spot Trouble with Your Chimney Before Fireplace Season

As the days get shorter and the air gets cooler, many homeowners look forward to that first cozy fire of the season. But before you strike a match, it’s important to make sure your chimney is in good working order. A damaged or blocked chimney doesn’t just reduce efficiency - it can create serious safety hazards, including chimney fires and carbon monoxide buildup. The good news? A little preventative maintenance now can save you from expensive repairs and dangerous situations later.

Here’s what to look for when checking your chimney this fall.

Cracks and Gaps in the Masonry

Start with a visual inspection. If you see crumbling mortar, missing bricks, or hairline cracks, that’s a sign your chimney is weakening. Water can seep into these gaps, freeze in the winter, and make the damage worse. Over time, this can compromise the entire structure. Small cracks can often be sealed, but larger problems usually require professional repair.

A Damaged Chimney Cap or Crown

Your chimney cap is the unsung hero of the fireplace system. It keeps out rain, snow, animals, and debris. Without it, your chimney can quickly become clogged or water-damaged. Similarly, the chimney crown - the cement slab at the very top - acts as a shield. If you notice rust on the cap or chips in the crown, it’s time to repair or replace before moisture finds its way inside.

Creosote Buildup

Even if the outside looks fine, the inside of your chimney can be another story. Burning wood produces a tar-like substance called creosote, which clings to the interior walls. Creosote is highly flammable, and too much of it can spark a chimney fire. If you notice a strong, smoky odor, or if you can see black, shiny buildup inside, schedule a professional cleaning before you use the fireplace again.

Signs of Water Damage

Look around the base of your chimney and inside your attic for water stains or dampness. Discoloration on ceilings and walls near the chimney can be a red flag. Water entering through cracks or missing flashing (the metal seal where the chimney meets the roof) can cause mold, rot, and costly structural issues.

While You’re Up There - Check Your Roof

Inspecting your chimney is also a great opportunity to take a quick look at your roof. Loose, curling, or missing shingles can lead to leaks that damage not only your chimney but your entire home. Shingle problems are easiest to fix when they’re caught early, so don’t wait until you see water spots inside your house to take action.

When to Call a Pro

Some issues, like trimming back tree branches or replacing a simple cap, may be safe for homeowners to tackle. But climbing on a roof always comes with risks, and chimney repairs often require professional tools and expertise. If you’re unsure about the condition of your chimney or roof, schedule an inspection with a qualified contractor. It’s a small investment that can prevent big problems down the line.

A healthy chimney doesn’t just make your fireplace more efficient; it keeps your family safe, too. Take a little time this season to inspect for cracks, damaged caps, creosote buildup, and signs of water leaks. And while you’re up there, give your roof a once-over, too. A careful check now means peace of mind when you’re enjoying those winter nights by the fire.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions 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 http://www.odonnellbros.com. Advice is for guidance only.