Small fixes that can make your home more comfortable without a major renovation
By Giovanni Alvarez
You’re sitting comfortably on the couch when you feel it: a cold breeze brushing against your ankles.
You check the air conditioner. It's not running. You look toward the window. It's closed. Yet somehow, outside air is finding its way into your home.
Before you start researching replacement windows or calling a contractor, consider something much simpler: you might just have a gap that needs sealing.
Drafty doors and windows can make rooms uncomfortable and force heating or cooling systems to work harder. Fortunately, some of the most common air leaks can be addressed with inexpensive materials and a little patience.
Let's start with the easiest solutions.
1. The Quick Fix: Block the Breeze
Sometimes you don't need a trip to the hardware store. You just need something to put in the way.
If cold air is sneaking underneath a door, try placing a rolled-up towel, small pillow, or homemade draft stopper against the gap.
You can even make your own draft stopper using a sturdy sock or fabric tube filled with clean, dry rice, sand, or another suitable material. Secure both ends carefully to prevent spills, particularly around children and pets.
These solutions are inexpensive, require almost no installation, and can be removed whenever necessary.
The downside? They only work while they're in place. They may also need repositioning whenever someone opens the door.
Think of them as temporary solutions rather than permanent repairs.
2. Weatherstripping: Seal the Sides and Top
If air is coming through the sides or top of a closed door, consider adhesive weatherstripping.
Weatherstripping is a flexible material designed to close small gaps between surfaces that move against each other, such as a door and its frame.
You can find several varieties:
Foam strips: Inexpensive, easy to cut, and often self-adhesive. Good for basic repairs, although they may wear out sooner.
Rubber or silicone strips: Flexible materials that can provide a longer-lasting seal when appropriately sized and installed.
V-shaped tension seals: Folded strips that compress when the door or window closes, helping block air along narrow gaps.
How to install adhesive weatherstripping
Open the door and inspect where it meets the frame.
Remove loose or damaged old weatherstripping.
Clean the installation surface and allow it to dry thoroughly.
Measure the areas that need sealing.
Cut the new strips to the correct lengths.
Peel away the adhesive backing gradually and press the strips firmly into place.
Close the door and check whether it latches normally.
Weatherstripping should be thick enough to seal the gap but not so thick that it prevents the door from closing.
Steady Tip: Don't automatically buy the thickest material. Measure the gap and check the product's recommended compression range first.
3. Clear Door Sweeps: Stop the Draft Underneath
Perhaps the air isn't coming from around the frame at all. Maybe it's creeping in underneath the door.
A door sweep may be the solution.
A door sweep is a strip of flexible material installed along the bottom edge of a door. It helps close the space between the door and the threshold or floor.
Some sweeps are made of clear vinyl or silicone, making them less noticeable than bulky draft stoppers.
Others use rubber blades, brushes, or metal holders with replaceable inserts.
How to install a clear adhesive door sweep
Measure the door's width.
Purchase a sweep suitable for the door and the size of the gap.
Cut the sweep to length if the manufacturer permits trimming.
Clean and thoroughly dry the attachment surface.
Position the sweep according to the manufacturer's instructions.
Remove the adhesive backing and press firmly into place.
Open and close the door several times to check the fit.
The sweep should help close the gap without dragging excessively or preventing the door from operating properly.
For exterior doors, choose a product rated for the expected moisture, temperature, and exposure.
Steady Tip: If the door already has a built-in bottom seal, inspect it first. You may only need to replace a worn insert rather than install an entirely new sweep.
4. Don't Forget the Threshold
The threshold is the strip across the bottom of a doorway that the door closes against.
Some exterior thresholds are adjustable, allowing the sealing surface to be raised slightly to meet the bottom of the door.
If yours has an adjustment mechanism, follow the manufacturer's instructions and make small adjustments.
Don't force the threshold upward. A door that no longer closes or latches correctly creates a different problem.
Also, inspect the door's hinges and latch. Sometimes a door that appears to have a sealing problem is simply misaligned.
5. Drafty Windows? Try These Simple Solutions
Doors aren't the only places where unwanted air enters.
Windows can develop leaks as seals wear out, materials shift, or older caulking deteriorates.
The correct repair depends on where the air is entering.
Window weatherstripping
If the draft comes from between a movable window sash and its frame, weatherstripping may help.
Choose a product compatible with your window type. Sliding, double-hung, and casement windows may require different sealing materials.
Install it where the manufacturer recommends, and check that the window still opens, closes, and locks correctly.
Window insulation film
Clear window insulation kits use a thin sheet of plastic attached to the interior window trim with special tape.
Many kits allow you to tighten the film gently, using a household hair dryer.
The result creates an additional air barrier over the window.
Follow the kit's instructions carefully, especially regarding heat and surface compatibility.
This can be particularly useful for windows you don't need to open during colder months.
However, never cover or disable a window that must remain available as an emergency exit.
Caulking around window frames
Caulk is a flexible sealing material used to fill cracks and gaps between stationary surfaces.
For example, if air is entering between the window trim and the surrounding wall, properly applied caulk may help.
The important distinction is:
Weatherstripping is generally used where parts move. Caulk is used where they don't.
Before applying caulk:
Identify the actual gap.
Remove loose, deteriorated caulk as appropriate.
Clean and dry the surface.
Choose a caulk compatible with the materials and location.
Apply it according to the product directions.
Allow it to cure for the recommended period.
Never caulk window tracks, moving parts, or drainage openings. Blocking drainage can trap moisture and cause damage.
Large gaps may require backing material or professional repair instead of simply applying more caulk.
6. How Can You Tell Where the Draft Is Coming From?
Before purchasing anything, try a little detective work.
Use your hand. On a windy day, move your hand slowly along the edges of a closed door or window. You may be able to identify an obvious stream of incoming air.
Look for daylight. Visible light around a closed exterior door can indicate a gap that needs attention.
Try the paper test. Place a strip of paper between the door and its seal, then close the door. If the paper pulls out with almost no resistance, that section may not be sealing tightly. Repeat at several points.
Check the hardware. Make sure windows are fully latched, door hinges are secure, and nothing is preventing the surfaces from closing properly.
Keep in mind that cold glass and natural air movement inside a room can sometimes feel like a draft even when there isn't an actual air leak.
You don't need to fix something that isn't broken.
7. Which Solution Should You Choose?
Where's the problem? What might help?
Underneath a door Rolled towel, draft stopper, or door sweep
Around the top or sides of a door Adhesive weatherstripping
Between a door and its threshold Replacement bottom seal or threshold adjustment
Around a movable window sash Compatible window weatherstripping
Around stationary window trim Appropriate caulk
Through multiple small gaps in an older window Interior window insulation film
Loose door hinges or hardware Tightening or adjusting the hardware
Start with the least expensive suitable repair, and test whether it solves the problem before spending more.
8. When a Simple DIY Fix Isn't Enough
Not every draft can be solved with adhesive strips.
Consider professional help if you discover:
Soft, rotting, or severely damaged wood
Water entering around a window or door
Significant mold growth or persistent moisture
Broken glass or severely damaged window hardware
A badly warped frame
A door that cannot close or latch securely
A structural gap that continues growing
If you're renting, check with your landlord or property manager before making permanent alterations.
And remember that not every source of airflow is accidental. Never block required ventilation openings, combustion-air supplies, window drainage channels, or emergency exits.
9. A Small Repair Can Make a Difference
You don't necessarily have to replace your windows or install a new door just because you feel a draft.
Sometimes a rolled-up towel is enough for the evening. Other times, a carefully installed strip of weatherstripping, a clear door sweep, or a little caulk can help improve comfort for much longer.
The key is figuring out where the air is coming from before deciding how to stop it.
Start small, use the correct materials, and check your work.
A more comfortable home doesn't always require a major home-improvement project.
Sometimes it just requires closing a gap.
Steady Adulting | Home Maintenance & Fix-It
Suggested accompanying resource: Quick Home Draft Inspection Checklist — a one-page printable for checking doors, windows, thresholds, seals, and hardware.