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Helping diagnose common problems with existing window installations

How to fix a stiff or loose window hinge

uPVC casement windows in dual sage green and white knight

When you just want to open a window and it’s a struggle because it’s stiff, or it is loose and flapping about at the slightest breeze, it can be quite easily remedied.

If your window is stiff to open and close, there are a things to look out for. Are the metal runners clear from debris? Ensure they’re clean and clear for a smooth movement. If they are and it’s still stiff, try using a 3-in-1 oil to lubricate all circular pivot points at both the top and bottom of the window.

Do not use a solvent-based spray such as WD40 as they contain chemicals which can attack components of your window.

Should your window hinges be loose and the wind can blow it open, using the above advice, but tightening will solve it. Again, it does not need to be a big turn of the screw for it to affect the hinge. Both top and bottom screws must be adjusted, If this doesn’t rectify the problem, try loosening the screws located on the hinge – the window will need to be fully opened to expose the screw. Restricted hinges will need the buttons to be pressed before this is visible. You don’t need to turn the screws much, a slight movement should be enough.


Have you lubricated your hinges? Regular lubrication of the moving components is necessary to keep your windows operating properly. The following lubrication and maintenance checks should be carried out once a year.

PLEASE DO use a general light engineering oil with corrosion inhibitors such as 3-in-one® Multi-Purpose Oil (available in aerosol can for convenience).

PLEASE DO NOT use solvent based lubricants such as WD40®. These contain chemicals that attack components of your window. This can result in weakening and breaking of parts of the window and may stop them functioning. It will also damage decorative finishes.

Casement Windows - Hinges

Annually lubricate all pivot points with oil and wipe away excess.


Casement Windows - Locks

Annually lubricate the slider and gearbox to help with ease of operation.


Tilt and Turn Windows

The diagram below indicates the exact points that require lubrication. A drop of oil applied annually to each point will be enough to keep your Tilt Turn windows in perfect working order.


  1. Top Arm — The top arm must be oiled once a year, at all pivot points. Add a small amount of oil to the points shown.
  2. Top Hinge — These are only fitted to Tilt & Turn windows that open to 180º and are generally fitted in conservatories. The top hinge (left) must be oiled once a year, at all pivot points. Add a small amount of oil to the points shown. Remove the plastic cover if fitted and add a small amount of oil onto the top of the hinge.
  3. Keeps — In order to maintain the smooth-running action, the keeps must be lubricated once a year by applying petroleum jelly (Vaseline) or a light oil on the contact areas/leading edges.
  4. Rollers — To help the smooth-running action of the locking mechanism, annually apply a small amount of oil to each side of the rollers.

If you still have any additional questions or would like more information, speak to a member of our team today.