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Window Maintenance Checklist: How to Check Your Windows Before Winter

Writer: Victoria Collins CMgr MCMI
Victoria Collins CMgr MCMI
Sep 3
4 min read
white window overlooking trees
Winter Check of Windows

Early autumn is a good time to give your windows a little attention. The weather is still mild enough to work comfortably, and a quick check can reveal small maintenance jobs before colder, wetter months arrive. This si where a good Window Maintenance Checklist can come in really handy.


You do not need specialist tools for a basic inspection. Set aside ten minutes, work one room at a time and use the checklist below. Always follow the care instructions supplied by your window manufacturer, particularly when cleaning, lubricating or adjusting any component.


1. Open and close every window

Start with the simplest test: operate each window as you normally would. The handle should move without excessive force, the opening sash should travel smoothly and the window should close securely.


Pay attention to a sash that catches the frame, a handle that has become unusually stiff, or a lock that no longer engages cleanly. First check for visible dirt or an obstruction. If the window still resists, avoid forcing it. Hardware can sometimes need adjustment, but the correct method depends on the window system and is best handled using the manufacturer’s instructions or professional advice.


2. Check for unexpected draughts

With the window fully closed, slowly move your hand around the edge of the opening sash and where the frame meets the surrounding wall. A noticeable stream of cold air may point to a worn seal, a window that is not closing evenly, or a gap around the installation.


Remember: Trickle vents and other purpose-made ventilation openings are designed to admit controlled airflow. Do not cover or seal them while checking for draughts.


If you find a draught, note exactly where you feel it. That detail will be useful if you later ask an installer to inspect the window.


3. Inspect and clean the seals

Look at the rubber seals around opening sections. They should sit in place and appear continuous, without obvious splits, flattening or sections pulling away from the frame.


Gently wipe accessible seals with a soft cloth and mild soapy water, then dry them. Do not stretch or pull at them. Some manufacturers recommend a compatible silicone care product to help keep seals supple, but check the product-specific care guide before applying anything.


4. Clean frames, tracks and drainage routes

Dust, grit and wind-blown debris can collect around frames and moving parts. Use a soft brush or cloth to clear accessible tracks, channels and drainage openings, then clean the frame with mild soapy water. Avoid abrasive pads and strong household chemicals unless the manufacturer specifically approves them.


This is also a useful opportunity to inspect the finish. Timber frames should be checked for damaged paint or coating, particularly on exposed external surfaces. Any remedial work should follow the coating or window manufacturer’s guidance.

sash window over looking trees
Timber Sash Window Winter Check

5. Give the ironmongery some attention

Ironmongery is the collective term for working components such as hinges, locking points and handles. Once loose dirt has been removed, some systems benefit from a small amount of lubricant on specified moving parts.


Do not spray a general-purpose product across the whole mechanism. Window manufacturers may specify acid-free oil, silicone care products or a particular Teflon-based lubricant for different components. Use only the recommended product, apply it sparingly and operate the window a few times to distribute it where instructed.


6. Look at the glass and signs of moisture

Condensation on the room-facing surface of the glass often relates to moisture and ventilation inside the home. Use extractor fans where provided, keep background ventilation open and ventilate rooms appropriately.


Moisture or misting trapped between the panes of a sealed glazing unit is different and may indicate that the unit needs professional assessment. Cracked or loose glass should also be treated as a safety issue and inspected promptly.


When should you call a professional?

Routine cleaning and a visual inspection are straightforward, but seek advice if you notice:

  • a window that will not close or lock securely;

  • a sash that feels loose, has dropped or repeatedly catches the frame;

  • damaged, missing or displaced seals;

  • a persistent draught that is not coming from a ventilation opening;

  • condensation or misting between panes; or

  • cracked glass, water ingress or damage around the frame.

  • Avoid dismantling hinges, locks or glazing yourself unless the manufacturer’s guidance clearly describes the task and you are confident it can be completed safely. Never lean out of an opening window to inspect an external component.


A small job for the autumn window maintenance checklist

Checking your windows before winter does not have to become a major project. A short room-by-room inspection, gentle cleaning and the correct care for moving parts can help you understand their condition and highlight anything that deserves closer attention.


If you are unsure about a draught, damaged seal or window that no longer operates as it should, Coastview Windows can advise on suitable next steps. Visit the Coastview website to get in touch or arrange an appointment at the Hastings showroom.

www.coastviewwindows.co.uk or call us on 01424230842

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