Regular window maintenance is one of the easiest ways to protect your home from drafts, water intrusion, and high energy bills. Just like changing HVAC filters or testing smoke alarms once a year, a simple window checkup keeps everything working smoothly and can extend the life of your windows.
Below is an annual window checkup checklist you can follow each year, ideally in early spring or fall when temperatures are mild.
When Should You Do an Annual Window Checkup
Plan your window inspection for a time when you can comfortably open and close windows in every room, for example:
- At the start of spring cleaning
- Before the summer heat arrives
- Before storm or hurricane season in your area
Set a reminder on your calendar so it becomes a yearly habit.
Step 1: Confirm Windows Close And Lock Properly
Plan your window inspection for a time when you can comfortably open and close windows in every room, for example:
- Close the window fully, then engage the lock
- Make sure the lock latches easily, without forcing it
- With the lock engaged, gently push on the sash to see if it moves
If the window is not closing all the way or the lock does not line up, you may have:
- A misaligned sash
- Warped or damaged hardware
- A window that was installed out of square
This can affect both security and energy efficiency. If you have to slam or force the window to lock, it is time for an adjustment or professional service.
Step 2: Check The Reveal (Alignment Of The Sash)
The “reveal” is the small visible gap you see when the sash is slightly open. It should be even across the bottom of the window.
How to check it
- Unlock and open the window just a little, about a quarter of an inch
- Look at the gap along the bottom of the sash
- The gap should be the same size from one side to the other
If the reveal is noticeably wider on one side, your sash may be sagging, or the window may be out of alignment. That can lead to:
- Air leaks
- Difficulty locking
- Uneven pressure on hardware and weatherstripping
In that case, note the window on your checklist and consider having a window professional inspect it.
Step 3: Inspect Weatherstripping For Gaps Or Damage
Weatherstripping helps keep outside air, moisture, and noise from entering your home. A yearly check keeps it functioning properly. Simonton recommends checking both the sides of the sash and the weatherstripping around the inside of the sash.
Check the sides of the sash
- Look where the sash meets the frame on both sides
- Make sure the weatherstripping is continuous, not torn, crushed, or missing
- Look for spots where you can see daylight
Check the interior weatherstripping
On many double-hung windows, you can tilt the sash in to examine the inner weatherstripping more closely
- Open the sash slightly
- Locate the tilt latches at the top of the sash
- Pull in the latches, then carefully tilt the sash inward
- Follow the weatherstripping around the entire sash
You want to see a continuous, intact strip, with no missing pieces or obvious gaps. If it is damaged or worn out, replacement weatherstripping is usually available at hardware stores.
Step 4: Check Pre-Drilled Frame Holes and Weep/Drainage Holes
Many vinyl windows are manufactured with pre-drilled holes or cavities intended to be filled or sealed at installation. For example, Simonton windows come with four pre-drilled holes in the frame that should be filled with silicone.
What to do
- Open the sash and look into the frame track
- Locate any factory-drilled holes
- Confirm they are properly sealed, usually with silicone
- If you find unfilled holes, talk to the window manufacturer or use 100 percent silicone that is compatible with vinyl
Check the interior weatherstripping
- Make sure they are not clogged with dirt, paint, or debris
- Gently clear them with a soft brush or small plastic tool
Properly sealed frame holes and clear weep holes help prevent air infiltration and water buildup.
Step 5: Inspect Exterior Caulk And Sealant
Go outside and look closely at the edges of each window where the frame meets the siding, stucco, or brick.
Look for
- Cracked or crumbling caulk
- Gaps where caulk has pulled away from either the frame or the wall
- Open seams at the corners
If you see gaps or failed sealant, water can get behind the window frame and into the wall. That can lead to rot, mold, and interior damage over time.
Touch up or replace caulk with an exterior-grade product designed for your exterior surface and for use around windows. If you are not comfortable working at heights or on upper stories, hire a professional.
Step 6: Examine Glass And Frames For Damage
While you are at each window, take a moment to inspect the glass and frame
- Look for cracks, chips, or starbursts in the glass
- Check for fogging or condensation between double panes, which usually indicates a failed seal
- Inspect the frame for warping, soft spots on wood, or discoloration around corners
Minor cosmetic issues may not need immediate attention, but cracked glass or moisture between panes is a sign that a sash or entire unit may need replacement.
Step 7: Test Operation, Tracks, and Hardware
Smooth operation is part of your annual checkup
- Open and close each window fully
- Slide sashes up and down or side to side to feel for sticking, grinding, or scraping
- Check that balances, rollers, and hinges move freely
Clean tracks and moving parts
- Vacuum dirt and debris from tracks
- Wipe tracks with a damp cloth
- If allowed by the manufacturer, apply a light, non-greasy lubricant to metal hardware
If a window is tough to open, it can be a safety issue in an emergency, so do not ignore it.
Step 8: Clean Screens And Look For Tears
While windows are open, remove screens for a quick inspection
- Rinse them with a garden hose and a soft brush
- Look for holes, bent frames, or loose spline
- Repair small tears with patch kits or replace badly damaged screens
Clean screens help airflow and keep pests out when you want fresh air.
Step 9: Make Notes And Prioritize Repairs
While windows are open, remove screens for a quick inspection
For each window, mark
- Pass: no issues found
- Minor: small caulk touch-up or cleaning needed
- Major: does not lock, badly misaligned, cracked glass, or heavy drafts
This helps you decide what you can handle yourself and what calls for professional help.
When Is It Time To Consider Window Replacement
An annual checkup is not only about fixing small issues. It can also reveal when windows are near the end of their useful life. You may want to consider window replacement if you notice
- Persistent drafts even after sealing and weatherstripping repairs
- Condensation between panes that does not wipe away
- Rotting, swelling, or soft spots on frames or sills
- Repeated difficulty opening and closing, or locks that never line up
- Noticeable traffic noise or outside sound that your windows used to block
In these cases, new energy-efficient windows can improve comfort, reduce energy costs, and enhance curb appeal.
Make Your Annual Window Checkup A Habit
A yearly window inspection only takes a little time, but it can prevent expensive problems and keep your home more comfortable all year.
- Add “window checkup” to your annual home maintenance list
- Keep a simple written checklist with dates and notes
- Address small issues like caulking and weatherstripping quickly
- Call a trusted window professional if you find larger problems
If your annual window checkup reveals drafts, foggy glass, or windows that are difficult to open and close, it may be time to upgrade. Florida Window Geeks offers professional window installation and window replacement for homeowners in Southwest Florida, with energy-efficient options that improve comfort, security, and curb appeal.
Call us today at 239-439-4181 to schedule a consultation and get expert recommendations for your home.