Seasonal Prep - Seal Drafty Windows

Stop cold air in its tracks! Sealing drafty windows keeps your home warm, lowers energy bills, and protects your house from costly winter damage.

Why It Matters

Drafty windows aren’t just annoying — they’re expensive.
When warm air escapes and cold air seeps in:

Your energy bills skyrocket as your heat works overtime.
Rooms feel unevenly heated, leaving you cold and frustrated.
Moisture sneaks in, leading to condensation, mold, and damage.

💡 Fact: Sealing your windows before winter can save up to 20% on heating costs.

Signs You Have Drafty Windows

You feel cold air near window frames, especially on windy days.
Curtains or blinds move when windows are closed.
Whistling sounds or rattling during storms.
You see light or gaps around the window frame.
High heating bills with no other clear reason.

Quick Test: Hold a candle or incense stick near the window edges.
If the flame flickers, you’ve got a draft.

Tools & Supplies You’ll Need

These are your winterizing essentials:

Weatherstripping tape — [Amazon link] | [Home Depot link]
Window insulation film kit (clear plastic shrink film) — [Amazon link]
Caulk and caulk gun for permanent sealing — [Amazon link]
Draft stoppers or door snakes
Utility knife or scissors
Hairdryer (used to shrink window film)
Optional: Thermal curtains for extra insulation

Step-by-Step Guide to Sealing Drafts

1. Identify the Problem Areas

Check every window in your house using the candle test or by feeling for cold air.
Make a list of the worst offenders so you can focus your efforts.

2. Clean the Frames & Surfaces

Wipe down window frames with warm, soapy water and let them dry fully.
Dirt or moisture can prevent sealing products from sticking properly.

3. Apply Weatherstripping Tape

Best for quick, removable fixes.

Measure each side of your window frame.
Cut weatherstripping to size with scissors.
Peel off the backing and firmly press into place along the edges.
Close the window to test the seal.
“We recommend this weatherstripping kit for a budget-friendly, easy fix.”

4. Use Window Insulation Film (Shrink Film)

Adds an invisible barrier to block drafts.

Cut the film slightly larger than your window frame.
Apply the included adhesive tape around the frame.
Stick the film to the tape, smoothing out wrinkles.
Use a hairdryer to shrink and tighten the film for a clear, snug finish.

💡 Tip: This is perfect for renters — remove it easily in spring!

5. Seal Cracks with Caulk

For long-term solutions:

Look for gaps or cracks between the window frame and the wall.
Use caulk to fill these areas for a permanent draft fix.
Smooth the bead with a caulk tool or your finger.
“This easy-squeeze caulk gun is beginner-friendly and under $15.”

6. Add Draft Stoppers or Curtains

Place draft stoppers along window sills for extra insulation.
Upgrade to thermal curtains to lock in warmth and reduce heat loss.

7. Final Check

Repeat the candle test to make sure you’ve sealed everything properly.
Mark your calendar to check seals again in early spring.

DIY vs. Hire a Pro

If your windows are old, damaged, or leaking badly, it may be time to bring in a professional.

Benefits of hiring a pro:

✅ They can spot hidden leaks you might miss.
✅ Professional-grade sealing lasts longer.
✅ They can advise on whether full window replacement is needed.

Find a window specialist here:
Book a Pro on Thumbtack | Hire on Angi

Quick Checklist

Test windows for drafts
Clean frames and surfaces
Apply weatherstripping tape
Install window film
Seal cracks with caulk
Add draft stoppers or thermal curtains
Final inspection

Keep your home cozy, safe, and efficient this winter by sealing up drafts before the cold really sets in. A little prep now saves you stress, energy, and money later — plus, it’s a great excuse for extra blankets and cocoa! ☕