DIY Fix: Weatherproofing Doors for Michigan Homeowners

Living in Michigan means dealing with four full-blown seasons, from frigid winters to humid summers. But when it comes to comfort (and energy bills), one of the biggest troublemakers in any home is a drafty, poorly sealed door. Whether it’s letting in cold air during a snowstorm or leaking cool AC in the summer, a drafty door can cost you money year-round. Or even drafty windows can cost you money over time.

In this guide, we’re breaking down how Michigan homeowners can weatherproof doors themselves—with simple tools, easy fixes, and real-world handyman advice.

Why Weatherproofing Matters in Michigan

Michigan weather is unpredictable. One day it’s 50 and sunny, the next it’s snowing sideways. If your exterior doors aren’t sealed properly, you’re not just sacrificing comfort—you’re flushing money down the drain with every utility bill.

A drafty door can:

• Let in cold air, making your furnace work harder.
• Allow bugs and moisture inside.
• Cause your HVAC system to cycle more often.
• Lead to higher heating and cooling costs.

We have the good news? You don’t need to replace the door. A simple DIY weatherproofing fix can make a huge difference.

Step 1: Identify the Draft

Before you grab any tools, you need to figure out where the draft is coming from.

Try these tricks:

• Light Test: At night, have someone shine a flashlight around the edges of the door from the outside. If you see light coming through, air is getting in.
• Hand Test: On a cold day, slowly move your hand around the edges of the door. If you feel a breeze, that’s your draft.
• Smoke Test: Light a stick of incense or a candle and slowly trace it around the doorframe. If the smoke wavers or gets pulled, you’ve got a leak.

Step 2: Check the Weather-stripping

Weather-stripping is your first line of defense. It runs along the sides and top of the door frame and compresses when the door is shut.

Here’s what to look for:

• Cracked or brittle rubber
• Gaps or missing strips
• Flattened areas that no longer seal

Fix:
Replace with new adhesive-backed foam weather-stripping or install V-strip (tension seal). It’s cheap, easy to apply, and available at any hardware store.

How to Install Foam Weather-stripping:

1. Clean the surface with rubbing alcohol.
2. Measure and cut strips to length.
3. Peel the backing and press the adhesive firmly into place.

Step 3: Replace or Add a Door Sweep

The biggest source of drafts is usually the gap under the door. That’s where a door sweep comes in handy.

There are two main types:

• U-shaped sweeps that slide onto the bottom of the door.
• Metal or plastic sweeps that screw into the bottom.

Tip: If your floors are uneven, go for an adjustable sweep that you can tighten or loosen as needed.

Installation Steps:

1. Measure the width of your door.
2. Cut the sweep to size with a hacksaw (if necessary).
3. Screw it into the bottom edge of the door using pre-drilled holes.

Step 4: Add a Door Threshold or Replace the Existing One

If you’re existing threshold is worn down or missing altogether, you’re fighting a losing battle. Replacing it with a new, raised, adjustable threshold can eliminate drafts and improve the seal.

What you’ll need:

• Threshold kit (available at home improvement stores)
• Screws and drill
• Caulk or sealant

Steps:

1. Remove the old threshold.
2. Clean the surface and check for rot.
3. Measure and cut the new threshold to fit.
4. Screw it down and seal the edges with weatherproof caulk.

Step 5: Seal Gaps around the Doorframe

Sometimes the problem isn’t the door—it’s the frame. If you see gaps around the door casing (inside or out), seal them with latex caulk or expanding foam.

• Use latex caulk for small gaps (less than ¼”).
• Use low-expanding spray foam for larger openings.

Important: Don’t use high-expanding foam—it can warp the frame and prevent the door from closing properly.

Bonus Tips for Michigan Homeowners

Here are a few extra pointers just for folks dealing with Michigan’s extreme weather:

• Storm doors: If your front or back entry door doesn’t have one, consider adding a storm door. It adds an extra layer of insulation.
• Insulated curtains: For drafty patio doors or sliders, thermal curtains can do wonders in winter.
• Routine checks: Check your door seals every spring and fall. Michigan weather can wear them out fast.

When to Call a Pro

If you’ve done all the above and the draft is still there, it could be a sign of:

• A warped or bowed door
• Settling in the home’s foundation
• Frame damage due to moisture or pests

At that point, you may need to repair or replace the door—and it’s usually worth having a professional take a look.

Conclusion

Drafty doors aren’t just a minor annoyance. They affect your comfort, your energy bills, and even your health during extreme cold. But the good news is that weatherproofing a door is one of the easiest DIY projects you can tackle as a Michigan homeowner.

With a few tools, a bit of patience, and about an hour of your time, you can dramatically improve your home’s comfort and energy efficiency.