Most homeowners do not think about their windows and doors until something goes wrong. A draft shows up in January. A door sticks after the first freeze. Condensation appears on the glass on a cold morning. By then, the weather is working against you, and many of the best fixes are harder to do.
Fall is the better time. Temperatures are still moderate, you can open windows and doors to inspect them properly, and most sealants and finishes cure the way they should. An hour or two of attention now can prevent months of discomfort and higher energy bills.
This guide walks through what to check on your windows and doors, how to care for different styles, and when a small repair has stopped being enough.
Before You Start: Timing and Tools
Choose a dry day with mild temperatures, ideally in early or mid fall, so you can open windows and doors without losing much heat and so any sealant you apply has the conditions it needs to cure. Set aside a couple of hours for a typical home, or spread the work over a weekend.
You likely have most of what you need already: a vacuum with a brush attachment, a soft brush, mild soap and water, microfiber cloths, a screwdriver, a putty knife, a caulk gun, exterior-grade sealant, silicone-based lubricant, replacement weatherstripping, and a flashlight. If a window is on an upper floor and hard to reach, use a stable ladder with someone nearby, or leave that one to a professional rather than leaning out to reach it.
Start With a Walkthrough
Before you pick up a tool, take a slow lap through your home, inside and out. Open and close every window and door. Lock and unlock them. Look at each one in daylight, and make a note of anything that feels stiff, loose, damaged, or drafty. A simple list by room keeps the project organized and helps you decide later what you can handle yourself and what is worth a professional opinion.
Taking a few photos as you go is also worthwhile. A picture of a cracked seal, a stained sill, or a gap at a threshold gives you a clear record to refer back to later, and it is helpful if you decide to ask a professional to take a look.
Windows: What to Inspect and Clean
Glass and seals. Clean the glass inside and out so you can see clearly. Look closely between the panes of double pane windows. Fog, haze, or moisture trapped between the layers usually means the seal has failed, and that cannot be cleaned away.
Frames and sashes. Run your hand along the frames and look for soft spots, peeling paint, cracks, or discoloration. On wood windows, soft or darkened areas can point to moisture damage. On vinyl or composite frames, look for warping or gaps at the corners.
Tracks and weep holes. Dirt, leaves, and insects collect in window tracks over the summer. Vacuum them out and wipe them clean. Many windows also have small weep holes at the bottom of the frame that let water drain out. Make sure they are clear so water does not sit in the track and freeze.
Locks and hardware. A window that does not lock tightly does not seal tightly. Check that latches pull the sash firmly closed. A light cleaning and a small amount of silicone-based lubricant on moving parts can help windows operate smoothly.
Exterior caulk. Look at the caulk around the outside of each window frame. If it is cracked, shrunken, or pulling away, it is letting air and water in. Remove the old material and apply a fresh bead of exterior-grade sealant. Check the product label for the temperature range it needs, and do this on a dry day before nights turn consistently cold.
Screens. Remove window screens, clean them, and check for tears. Storing them for the winter protects them, and it lets in a bit more light on short days.
Checks for Different Window Styles
Each window style wears in its own way, so it helps to know what to look for on yours. With double hung windows, raise and lower both sashes and make sure they move smoothly and stay where you put them, since a sash that drops on its own may have a worn balance. Confirm that the lock pulls the upper and lower sashes tightly together at the meeting rail.
For casement windows, operate the crank through its full range and check that the sash closes snugly against the frame. Look at the hinges and the seal around the perimeter, since a casement relies on that compression to keep air out. Sliding windows call for a thorough track cleaning and a check that the sash glides without sticking, along with a look at the weatherstripping along the edges and where the sash meets the frame.
Picture and fixed windows do not open, so the glass seal and exterior caulk matter most. Look for fogging between the panes and for any gap along the frame.
Doors: What to Inspect and Adjust
Start with the weatherstripping. Close the door and look around the edges. It should be flexible, intact, and in firm contact with the door all the way around, and if it is flattened, cracked, or missing in places, it should be replaced. This is one of the most effective and affordable fixes in the whole guide. The bottom of the door is another common source of drafts, so check that the sweep touches the threshold evenly and look for daylight underneath. Many thresholds can be adjusted up or down with a few turns of a screw to close the gap.
Next, look at how the door hangs and latches. Tighten loose hinge screws and watch for signs of sagging, such as a door that rubs at the top corner or latch side, because a door that has shifted out of square will never seal well. If the latch does not catch smoothly, the strike plate may be misaligned, and small adjustments can bring it back into position so the door pulls tight against the weatherstripping.
The finish and surface of the door deserve a close look too, especially on the lower edge and the side facing the weather. Worn finishes on wood doors allow moisture in, and touching them up before winter helps protect the door. On fiberglass and steel doors, look for scratches, dents, or cracks in the finish that could let moisture reach the material underneath. If your entry door has glass panels beside or above it, check the glass seals and the caulk where the frame meets the wall, just as you would on a window.
Patio and sliding doors need their own attention. Clean the tracks thoroughly, check the rollers for smooth movement, and inspect the weatherstripping along the edges and where the panels meet. A patio door that is hard to slide or does not lock firmly is often telling you something about the track or rollers. For French patio doors, check that both panels close evenly and that the latch engages fully.
Finally, do not skip the doors that get less attention. If you use a storm door, check the closer, latch, and seals, and make sure the glass or screen panel is correctly installed for the season. Garage and basement entry doors are easy to overlook, but they often separate heated space from unheated areas, so give them the same care as your main entry doors by checking the weatherstripping, sweep, and threshold for gaps.
A Simple Fall Maintenance Checklist
If you prefer to work through this in order, here is a practical sequence:
- Walk through the home and note problem areas on every window and door.
- Clean glass, frames, and tracks, and clear weep holes.
- Remove, clean, and store window screens.
- Lubricate hinges, rollers, and window hardware.
- Tighten loose screws and adjust strike plates and thresholds.
- Replace worn weatherstripping and door sweeps.
- Remove failing exterior caulk and reseal on a dry day.
- Touch up exposed finish on wood doors and trim.
- Test every lock, latch, and closing mechanism one more time.
Signs the Problem Is Bigger Than Maintenance
Maintenance can extend the life of your windows and doors, but it cannot fix every issue. If you notice fogged or moisture-filled glass between the panes, rotted, soft, or warped frames and sashes, or windows that still will not open, close, or lock properly after cleaning and lubrication, it may be time to consult a professional.
Other warning signs include doors that stick, sag, or no longer close squarely, patio doors with damaged tracks, rollers, or glass seals, and drafts that return even after replacing weatherstripping and caulk. Water stains or damage on the walls or floors beneath a window or door can also indicate a problem that needs further attention.
Catching these issues early gives you time to explore repair or replacement options on your schedule rather than reacting to a problem in the middle of winter.
Make It a Seasonal Habit
A fall walkthrough works best as part of a yearly rhythm. A quick look in spring can catch any damage from winter, and a light cleaning in summer keeps tracks and screens in good shape. Keeping short notes from each pass, even just a list on your phone, makes it easy to see what has changed from year to year and which windows or doors are starting to need more than routine care.
Over time, you will get a feel for the normal sounds, movement, and look of each opening. When something starts to feel different, you will notice it early, which is usually when it is easiest to address.
Need a Repair or Replacement? ACRE Can Help
If your walkthrough turns up damage that goes beyond routine upkeep, ACRE Windows & Doors can take it from here. Our team handles window and door repairs and full replacements for homes across New Jersey, Pennsylvania, and Northern Delaware. We will inspect the problem areas in person, explain whether a repair will do the job or a replacement is the better long-term choice, and complete the work with our own installers. Reach out to schedule a visit and get your windows and doors ready before winter arrives.
Why Choose ACRE
Homeowners choose ACRE because of how we work as much as what we install:
- Andersen Certified Elite Contractor. This status reflects Andersen’s standards for installation quality and customer care, which helps your windows and doors perform the way they are designed to.
- No subcontractors. ACRE’s own team handles your project from measurement through installation, so you have one company responsible for the result.
- Trusted product lines. We carry Andersen, ProVia, Harvey, and Therma-Tru, along with our own ACRE EnergyPro line, which gives you real choices in style, material, and performance.
- 0% financing. Financing can make it easier to move forward with the project your home needs, when it needs it.
- Free in-home consultation. We visit your home, look at the condition of your windows and doors, and give you honest guidance with no obligation.
Schedule Your Free In-Home Consultation
Whether your windows and doors need a little attention or a full replacement, a free consultation with ACRE is a good place to start. Contact us today to set up a time, and we will help you get your home ready for the colder months ahead.
