Almost every home has seen it at least once: a window or balcony door sash will not stay in the position you need, so a wooden wedge, a book or a slipper goes underneath — anything to keep it from swinging shut. From the outside, nothing bad seems to be happening.
In reality, at that moment the entire weight of the sash — and with a glass unit that is tens of kilograms — starts working against the frame. Hinges and hardware are designed for smooth movement, not for a point load from below at a fixed angle.
Never put objects under the corner of a window or door sash. There are plenty of purpose-made accessories and mechanisms for holding a sash in position — restrictors, vent combs, stoppers, door closers. They cost far less than a repair.
How the "Temporary" Prop Ends
When the sash rests on a wedge, the load is no longer distributed across all fixing points. The bottom hinge starts acting as a lever: every gust of wind and every movement of the sash gradually loosens the fixing and deforms the metal.
The result is in the photo — the bottom hinge torn out together with part of the profile. Damage like this means:
- the sash no longer holds and may fall out — that is already a safety issue;
- the PVC profile itself is damaged, not just the hardware;
- a simple adjustment is no longer enough — serious repair is needed.
Similar consequences come from another habit — hanging bags on an open sash or letting a draught slam the window shut.
"A prop under the sash saves seconds, but the repair after it takes hours. The right accessory solves the same task — with no consequences." — SIA Logu Apkope technicians
The Fix: a Reinforced Hinge in the Hardware Groove
Putting the hinge back in its old place was impossible in this case — the mounting seat in the profile was destroyed. So we used a different solution: a reinforced hinge that mounts in the sash's hardware groove instead of the damaged part of the profile.
A hinge like this spreads the load through the hardware groove onto the steel reinforcement and holds the sash more securely than the standard one. It is a common technique in hardware replacement on sashes with damaged profiles — the whole window does not have to be replaced.
Reinforced hinges carry heavier sashes and are often used in window modernization — for example, when installing a heavier energy-efficient glass unit.
The Result: the Window Works Like New Again
After installing the reinforced hinge we adjusted the sash compression at every point and checked the hardware and the seals. The window opens and closes smoothly, the sash sits straight with no misalignment — and from the outside the repair is completely invisible.
What to Use Instead of a Prop
For any task — keeping a sash ajar, holding, limiting or closing it smoothly — there is a ready-made solution in our range of window and door accessories:
And if you want fresh air without an open sash at all, take a look at our ventilation solutions: trickle vents work even with the window closed.
If the sash has already sagged, catches on the frame or a hinge is damaged — do not put the repair off: the longer a window operates out of alignment, the more expensive the restoration. We carry out window and door repairs of any complexity, including reinforced hinge installation, and will select the right accessories for your needs.
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