Note: This DIY article is provided as a general guide only and is not intended to take the place of product-specific installation procedures; always follow applicable manufacturers’ instructions. Depending on your home’s age and condition, location within the home, and other potential factors, repairs and/or upgrades or other services may be necessary prior to the beginning and/or completion of your project that may involve the services of a home improvement professional. This article does not include advice pertaining to local building codes and/or any related inspections.

When the temperature drops and winter winds are howling, your home should be your warm, dry, pest-free haven. But if your caulking is cracked, missing, or old, you could be losing more than just comfort. You may be paying for it in higher energy bills, costly water damage, or unexpected pest problems. In this article, we’ll explore how sealing your home now can help you save later, and what products you need in your toolkit to do it right.

Spending a few hours sealing your home this fall can significantly affect energy costs, water damage prevention, and pest control.

Why caulking matters for fall and winter

Caulking is one of those often-overlooked maintenance tasks that pays off year-round, especially as the seasons change. It is a physical barrier that blocks unwanted elements and stabilizes your indoor environment. Here’s why fall and winter are the perfect times to inspect and update your home’s caulking.

 

1. Improve energy efficiency by sealing air leaks

Drafty windows and doors are one of the main culprits behind heat loss in the winter. When warm indoor air escapes and cold air sneaks in, your heating system has to work harder, leading to higher utility bills.

By sealing air leaks with high-quality silicone sealant, you can boost your home’s energy efficiency and maintain a consistent temperature indoors. This improves comfort and reduces your carbon footprint and long-term heating costs.

 

Rain-covered window that has been sealed for energy efficiency.

 

2. Prevent water damage from snow and ice

Winter storms, melting snow, and freezing rain can wreak havoc on your home’s exterior. Water infiltration around windows, doors, siding, or foundation cracks can lead to mold, mildew, rot, and expensive repairs.

Fresh, flexible silicone sealant helps protect vulnerable joints from moisture intrusion, especially when temperatures fluctuate between freezing and thawing. Silicone sealants are especially well-suited for this task because they remain flexible and waterproof even in extreme conditions.

 

3. Enhance pest prevention

Rodents and insects are notorious for seeking shelter in warm spaces as outdoor temperatures drop. If there’s even a small gap around your home’s foundation, pipes, or vents, it can serve as an open invitation into your home.

That’s where GE Pest Block Insulating Foam comes in. This insulating foam expands to seal cracks and crevices, forming a barrier that blocks pests from entering your house.

Recommended products for a sealed, protected home

Not all sealants are created equal. You’ll want to use the correct product type for long-lasting results for each job. Here are two must-have products for your fall and winter home prep.

Man sealing air leaks by applying GE Supreme Silicone Window & Door Sealant.

 

Silicone sealant for windows and doors

The GE Supreme Silicone Window & Door Sealant is a 100% silicone sealant, ideal for exterior applications where durability and flexibility matter most. It’s designed to withstand harsh weather, UV exposure, and temperature changes without cracking or shrinking. Use it to:

  • Seal gaps and joints around window frames and door jambs
  • Close cracks in siding or trim
  • Prevent air and water leaks in high-exposure areas

Because silicone doesn’t degrade like acrylic caulks, it’s an excellent investment for long-term protection. Just note that this particular product isn’t paintable, so it comes in six different colors to match the exterior of your home. Try our hybrid sealant, GE Pro Seal Max Window & Door, if you need something paintable.

 

GE Pest Block Insulating Foam.

 

Insulating foam for gaps and cracks

GE Pest Block Insulating Foam is specially formulated to expand and seal entry points commonly used by pests like mice, ants, and spiders. It’s perfect for:

  • Gaps around utility pipes, HVAC lines, and dryer vents
  • Openings in the basement, crawl space, or attic
  • Foundation cracks and holes

Beyond pest prevention, this foam also insulates to reduce drafts and improve your home’s overall energy efficiency. Because it’s only designed to seal small openings less than one inch wide, use GE Big Gaps & Cracks for larger areas.

Where to inspect and seal for energy efficiency and pest prevention

As you prepare your home for colder weather, you must check all the common areas where air, moisture, and pests can sneak in. Start by walking around your home’s interior and exterior, checking for small gaps, cracks, and worn-out caulking. Here are the top spots to inspect.

 

Windows and doors

Examine the seams around each window frame, especially where the frame meets the siding or trim. If you feel drafts or see visible cracks, it’s time to reseal the window using a high-quality silicone sealant. The same goes for doors. Check the trim and weatherstripping around exterior doors, looking for any gaps where cold air could enter or heat could escape. 

 

Foundation and basement

Small holes or cracks near the base of your home can be ideal entry points for pests. Use GE Pest Block Insulating Foam near corners or utility penetrations. Also, look at any areas where pipes, vents, or wires enter your home, such as dryer vents, electrical outlets, or plumbing. These spots are often overlooked but are common culprits for air leaks and pest intrusions.

 

Attic and crawl space

If you see daylight peeking through or feel cold air drafts in your attic or crawl space, you likely have a sealing issue. Even small cracks can allow significant heat loss during the winter months. Sealing these gaps now can help you maintain consistent indoor temperatures.

Seasonal tips for DIY success when sealing air leaks

Timing and technique are key when applying new caulking or foam insulation. Keep these best practices in mind:

  • Clean the area first: Remove old caulk or debris so the new material can adhere properly.
  • Choose a dry day: Apply sealant when temperatures are above 40°F and surfaces are dry.
  • Use a caulking gun for control: A steady, consistent line ensures better results.
  • Let it cure: Give the product time to cure before exposing it to moisture.

Spending a few hours sealing your home this fall can significantly affect energy costs, water damage prevention, and pest control. You can protect your biggest investment through winter and beyond with the right products, like silicone sealant and insulating foam. Don’t wait until cold air, water, or unwanted critters remind you to take action. Seal it now and save yourself the headache later.

FAQ

How do I know if I need to replace my existing caulking?

If your caulk is cracking, pulling away from the surface, or missing entirely, it’s time to replace it.

 

What’s the difference between silicone sealant and acrylic caulk?

Silicone is waterproof, flexible, and long-lasting, ideal for exterior use and areas exposed to temperature changes. Acrylic caulk tends to shrink and crack over time, meaning it must be replaced more often. Silicone should be your go-to choice for longevity in moisture-prone areas.

 

How often should I inspect caulking around my home?

It’s a good idea to check caulking at least once a year. Fall is the perfect time, before winter weather sets in. 

Ready to seal your home for winter? Find a store near you in the U.S. or Canada that carries GE products.