I think we can all agree, windows are pretty important. They are constantly exposed to the UK’s questionable climate—from driving rain and frost to strong UV radiation and summer heat. Over time, these elements degrade the essential seals, hardware, and materials, leading to common problems like draughts, condensation, and mechanical failure. A proactive routine is the key to preventing costly major repairs that require a professional call-out.
Neglecting simple maintenance, such as not clearing blocked drainage holes or failing to lubricate uPVC windows, can lead to irreparable damage to the frames or mechanisms. This guide provides an essential maintenance checklist for all common window types, helping you keep your windows doing their jobs for as long as possible.
The quarterly maintenance check: Focusing on mechanisms
Perform this basic check-up on all your windows at least once every three months, focusing on the mechanical components that suffer from friction and use.
| Component | Maintenance Task | Why it Matters |
| Moving Parts (Hinges/Locks) | Apply a light silicone spray (or a specialist lubricant, never oil) to the hinges, espag gearing (multi-point lock track), and any moving cam bolts. | Prevents metal-on-metal friction and seizing, which is the main cause of handle failure and hinge damage. |
| Drainage Holes (Weep Holes) | Ensure the small drainage slots (weep holes) in the bottom of the external frame are clear of debris, using a fine plastic tool or pipe cleaner. | If blocked, water cannot drain and will build up inside the frame, leading to internal leaks, mould growth, and accelerated seal failure. |
| Gaskets and Seals | Inspect the perimeter rubber seals (gaskets) for cracking, shrinkage, or hardening. Clean with mild soapy water. | Hardened or shrunken seals lose their elasticity, which is the primary cause of air leaks, draughts, and rattling. |
| Fasteners | Tighten any loose screws on the handles, hinges, or casement stays. | Prevents handles from dropping or the sash from pulling away from the frame, compromising the seal. |
Specific maintenance tips
1. Timber Windows
Timber requires attention to the finish, which is its protective layer.
- Annually (Spring): Inspect painted and stained frames closely for any hairline cracks, blistering, or peeling paint, especially on the bottom rail. Touch up immediately, priming any bare wood before applying the final topcoat. UV light and moisture will exploit these cracks, leading to rapid rot.
- Focus: Check the condition of the putty or sealant securing the glass to the timber. Failed putty allows water to sit on the wood, starting the decay process.
2. uPVC and Aluminium Windows
These materials are low-maintenance but rely heavily on seals and hinges.
- Annually (Autumn): Check all external perimeter seals (where the frame meets the brickwork) for cracks or shrinkage. Rake out and replace any failed sealant to prevent moisture ingress before the freezing winter weather exacerbates the damage.
- Focus: Ensure all hinges and multi-point locks are fully lubricated to prevent the mechanism seizing in the cold months.
When to call a professional fitter
Routine maintenance will significantly reduce call-outs, but some issues require a specialist window fitter:
- Failed IGU Seal: If you see condensation between the two panes of glass, the double glazing seal repair has failed. The fitter will replace the entire IGU (Insulated Glass Unit) without removing the frame.
- Sash Alignment: If the window rubs or catches when closing, it needs realignment (toe and heeling), which requires professional skill to ensure the glass is correctly supported.
- Hinge Failure: Hinges on heavy uPVC windows eventually wear out. A uPVC window hinge replacement is a simple, cost-effective repair that restores full function and draught-proofing, saving the cost of a full window replacement.
Even though we take them for granted, a busted window can be one of the most annoying, and dangerous, problems in the home. By performing simple, routine maintenance, you are safeguarding your investment and significantly extending their lifespan.
With Rated People, you have the power to get it done. Find a trusted, local tradesperson today.