Post-Winter Storm Inspection: Quick Checklist

• Clear snow from wood trim, doors, and windows
• Check dryer vents and HVAC exhausts for blockages
• Look for signs of ice damming along roof edges
• Inspect gutters for ice or overflow
• Examine caulk, sealants, and painted wood trim
• Check the attic for moisture or water stains

Winter storms can be beautiful to watch from inside your warm home, but they can also reveal hidden vulnerabilities. As a new homeowner, your first major snowstorm might feel overwhelming. What should you check? What’s normal? What do you need to worry about? What requires immediate attention?

The good news is that if your home was built to code and properly maintained, it’s designed to handle significant snow loads. Most homes in our area are engineered with the weight of snow in mind. However, a major winter storm is actually one of the best opportunities to assess your home’s condition and catch potential issues before they become expensive problems.

Think of it this way: if you’re wondering about your physical fitness, you don’t just sit and wonder—you go for a run and see how you do. Similarly, a winter storm is nature’s stress test for your home. Here’s what you should be looking for.

Understanding How Your Home Handles Snow

Before diving into your inspection checklist, it helps to understand the basics. Roofs and structural framing are engineered with something called dead load capacity, which accounts for the weight of stationary materials like snow and ice. Most roofs in our region are designed to handle a 10 pound per square foot dead load. This means that even with 12 to 16 inches of snow, your roof structure should be well within its safe capacity.

Of course, if you’re in areas that regularly see multiple feet of snow, you might see homeowners clearing their roofs with special tools. That’s because two, three, or four feet of snow can exceed the design load and pose a collapse risk. But for typical storms in our area, structural concerns aren’t your primary worry.

Your Post-Storm Exterior Inspection Checklist

1. Clear Snow Drifts from Vulnerable Areas

Walk around your home and look for snow piled against:

• Wood trim
• Window sills
• Door thresholds
• Garage door trim
• Any exposed wood surfaces

Snow that sits against these materials will melt and refreeze repeatedly, working its way into gaps, cracks, and caulk lines. This freeze-thaw cycle is particularly damaging to wood and can accelerate deterioration.

Take a few minutes to brush or shovel snow away from these sensitive areas. Pay special attention to the bottom trim around garage doors, entry doors, and decorative trim around windows.

2. Check Exhaust Vents and Condensation Lines

Inspect the following:

• Dryer vents (often only 12–18 inches above grade)
• Furnace and water heater exhaust vents
• HVAC condensation drain lines

Snow drifts can block important exhaust vents, particularly those close to the ground. Your dryer vent, for example, might be only 18 inches above grade. If it gets blocked by 20 inches of snow, your dryer can’t exhaust properly, leading to lint buildup, moisture problems, or even appliance damage.

Similarly, HVAC condensation lines that drain to the exterior need to remain clear. Walk your home’s perimeter and make sure all vents and drainage points are accessible and functioning.

3. Inspect for Ice Damming

Ice damming is one of the most common winter issues for homeowners. Here’s how ice dams form:

• Heat escapes into the attic, warming the main roof area
• Snow melts on the upper roof
• The melted snow flows toward the roof edge
• Cold overhangs refreeze the water
• Ice builds up and forces water backward, creating an ice dam

The problem is that roofs are designed for water to flow downhill, not uphill. As water backs up behind the ice dam, it can work its way underneath shingles and potentially cause leaks. This is where proper installation matters: Ice and Water Shield, a specialized underlayment that extends 24 inches past the warm wall of your home, is designed to prevent exactly this problem.

If your roof was installed or replaced in the last 15 years in Fairfax or Montgomery County, it should have Ice and Water Shield as part of the code requirements. However, many roofs, even some newer ones, could have been installed without it, either as a cost-saving measure or due to contractor oversight.

As a homeowner, there’s not much you can immediately do about ice damming except to potentially clear snow and ice from the gutter line if you can do so safely. If your roof is high or you don’t have the proper tools, don’t attempt this yourself. The good news is that if you do have Ice and Water Shield installed, ice damming is more of an inconvenience than a serious threat.

4. Examine Your Gutters

What to look for:

• Ice-filled gutters
• Water spilling over the edges
• Icicles forming repeatedly

Clean gutters are crucial for managing winter precipitation. When gutters are clear, water flows through them and away from your home. When they’re clogged with leaves, moss, and debris, that debris holds water, which then freezes solid. Once frozen, the gutters are effectively blocked, and any additional melting snow has nowhere to go.

This is why fall gutter maintenance is so important. It’s much easier to prevent ice blockages than to fix them after the fact. If you notice ice buildup in your gutters or water overflowing from the edges, it’s a sign that either your gutters were already clogged before the storm or that ice damming is creating backup issues.

5. Look for Gaps and Cracks in Caulk and Sealants

Check areas such as:

• Trim against siding
• Windows against aluminum capping
• Corners where materials change

Anywhere two different materials meet on your home’s exterior: wood trim against vinyl siding, windows against aluminum capping, corners where materials change, there should be caulk or sealant keeping water out. Over time, caulk degrades, cracks, and pulls away from surfaces.

While rain typically hits and flows away, snow piles up against these vulnerable spots and sits there. As it slowly melts, water drips into every crack and gap. Walk around your home after brushing snow away and look at the condition of caulk lines. If you see gaps, cracks, or areas where caulk has pulled away, note them for repair.

The fix is relatively inexpensive. A tube of quality exterior caulk costs $12 to $14, but the damage from water intrusion can be extremely costly. Once water gets inside your walls and causes wood rot or mold, you’re looking at major repairs involving siding removal, wall reconstruction, and potentially drywall and insulation replacement inside.

6. Check Painted Surfaces and Wood Trim

Pay close attention to:

• Bottom edges of trim
• Areas near doors and garage openings
• Places where snow accumulates

Any exterior wood on your home should be painted or sealed every five to seven years. If you’ve been in your home longer than that and haven’t repainted, or if you’re a new homeowner and don’t know the last time wood surfaces were maintained, a winter storm can reveal problems.

Look at the very bottom of painted wood trim, especially around doors, windows, and garage areas. This is where moisture damage typically starts because it’s closest to the ground where snow accumulates. If you see wood that looks soft, shows gaps between the wood and adjacent materials, or appears weathered and exposed, it needs attention.

Wood trim is often installed to cover gaps between different materials. For example, where your brick and siding come together, or where siding meets door frames or trim. When that trim deteriorates and creates gaps, water can reach places you definitely don’t want it: subfloors, floor joists, rim boards, and basement areas.

Don’t Forget the Attic

Look for:

• Dark staining on roof decking
• Damp or wet insulation
• Visible moisture or dripping

After a significant winter storm, one of the most valuable things you can do is check your attic. Look at your roof decking (the plywood or OSB underneath your shingles) for signs of moisture. If water has worked its way under your shingles due to ice damming or other issues, you’ll see evidence of it on the underside of the roof.

This inspection is most informative after snow has been on the roof for several days, giving any water intrusion time to become visible. If you find moisture or water stains, you know exactly where your vulnerabilities are and can address them before the next storm.

The Bottom Line for New Homeowners

The reality is that much of how your home handles a winter storm was determined when it was built or last renovated. Proper installation of Ice and Water Shield, adequate roof load engineering, and quality construction all matter. As a new homeowner, you can’t change the past, but you can use storms as opportunities to learn about your home’s condition.

The key is to stay proactive with maintenance: 

• Keep your gutters clean
• Maintain paint and caulk
• Clear snow from vulnerable areas
• Inspect your home after weather events

These relatively simple tasks can prevent the kind of expensive water damage that results from neglect.

If you’re unsure about what you’re seeing or want a professional assessment, winter storms are an excellent time to have your home inspected. Problems that might be invisible in good weather often reveal themselves when your home is under stress.

Remember: a winter storm is not something to fear if your home has been properly maintained. It’s actually a valuable diagnostic tool that shows you exactly where attention is needed. Use it as an opportunity to become a more knowledgeable and confident homeowner and contact our team at Presidential Exteriors today.