Situations
Securing a door often moves the problem to the windows beside it. Four products cover it: a push-to-lock bolt that stays in use, a lock that fits top or bottom rather than only at the handle, a hinge-side bolt for the edge that is rarely reinforced, and a clamped bar for a window that may not be drilled.
Window locks fail for a reason that has nothing to do with strength: they stop being used.
A lock that closes by pushing, like the BASI in this guide, stays in use every night. A lock that needs a key to close, like the BURG-WÄCHTER, risks being given up within a few weeks: keep it for windows that are not opened every day. That difference matters as much as the materials.
Not always the handle. A tall casement flexes in the middle, a balcony door is levered near the bottom. Push a corner with your hand — wherever it moves is where the lock belongs.
The hinge side. One product here addresses it, and a window secured on one edge only has simply moved the attack to the other.
Every window lock holds only if the screws find the steel reinforcement inside the frame. That is the installation, and no packaging solves it.
Where a locked handle removes the simplest entry method entirely.
Where restrictors allow air without an opening a person can use.
Where cover from view is what makes a window attractive, more than the window itself.
Where policies often specify locks on accessible windows, and where compliance matters at claim time.
| The window | The measure | The caution |
|---|---|---|
| Accessible, on view | Lockable handles | Cheap and effective |
| Hidden by a fence | Locks plus lighting | Cover is the risk |
| Used for ventilation | Restrictors | Air without an opening |
| Bedroom escape window | Careful | Must still open in a fire |
Window locks are used rarely and seize accordingly, and a lock that will not turn is a lock that stops being used. Hinges and friction stays also wear, and a window that no longer closes squarely cannot be locked properly at all.
Fire escape outranks burglary prevention.
Three window locks · push-button locking, no key · M5×50 self-tapping screws supplied · white
Three window security bolts operated by push button rather than by key, which BASI states lock by hand and release quickly. Each comes with four M5 × 50 mm (0.20 × 1.97 in) self-tapping screws.
Best for: Doing every ground-floor window at once, without a key for each.
Zinc die-cast body · lockable · fits top, bottom or handle side · 2 keys · retrofit
A lockable window security bolt in a zinc die-cast housing, which BURG-WÄCHTER states can be fitted on the top, bottom or handle side of a window or balcony door with a few holes.
Best for: A window where the best fixing point is not the handle side — a tall casement, or a balcony door.
≈ $69
Hinge-side lock · bolt rated to one metric ton of pressure · ABUS level 10 · 123 × 42 × 86 mm (4.84 × 1.65 × 3.39 in)
A hinge-side security bolt for inward-opening windows — the side almost nobody reinforces. ABUS states the bolt protects up to one metric ton of pressure and rates it at security level 10 on its own scale.
Best for: The half of the window that every other lock in this hub ignores.
≈ $68
Telescopic security bar · 101–175 cm (39.8 to 68.9 in) · orange, visible from outside · rubberized pads · no drilling
A telescopic bar clamped into the window reveal rather than screwed to the frame — vertically, horizontally or diagonally. SCHMIDT states 101 to 175 cm (39.8 to 68.9 in) of adjustment, rubberized pressure pads, and a deliberately visible orange finish.
Best for: A rented apartment, a vacation rental, or any window where nothing may be drilled.
Because a window levered on the hinge side leaves the frame with its hinges attached, and every handle-side lock is still engaged when it does. Reinforcing one side moves the attack rather than stopping it.
Keyless where the window is an escape route and no child could open it, because a lock that needs a key at bedtime stops being used. Keyed where glass is close enough that a hand could reach the catch, or where a child might open it.
Lockable handles on accessible windows. They remove the simplest entry method.
No, that makes the lock decorative. Keep keys nearby for emergencies but out of sight and out of reach from outside.
Restrictors let a window open a limited amount, which allows air without leaving an opening a person can use.
The one hidden from view. Cover from the street is what makes a window attractive, more than its size or type.
They are effective and they raise serious fire escape questions. Check what regulations apply before fitting them to any escape window.
Some policies specify locks on accessible windows. It is worth checking the wording rather than discovering it during a claim.
Designed for: Doing every ground-floor window at once, without a key for each.
Its main asset: Push-button locking with no key — the habit survives
Its main gap: No key means anybody inside can release it — including a child
Designed for: A window where the best fixing point is not the handle side — a tall casement, or a balcony door.
Its main asset: Fits top, bottom or handle side, so the fixing follows the frame rather than the fashion
Its main gap: Needs a key to lock as well as to open
Designed for: The half of the window that every other lock in this hub ignores.
Its main asset: Secures the hinge side, which is where an unreinforced window is levered off
Its main gap: Only useful in addition to a handle-side lock, not instead of one
Designed for: A rented apartment, a vacation rental, or any window where nothing may be drilled.
Its main asset: No drilling at all — it clamps into the reveal
Its main gap: A clamped bar depends entirely on the reveal being sound
$5 – $10
2 models
$16 – $60
2 models
Device against device, already covered, inside this guide or this aisle.
The devices listed are drawn from the catalog of this site. Specifications are those the maker and the Amazon listing publish; prices are what Keepa recorded on the date shown, and both move. The order follows declared specifications, the balance between stated strengths and stated limits, and price. No device here has been installed or tested by us, and no page claims it was.
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Prices quoted in these summaries are dated readings. The live price is shown next to each product.
Cameras, alarm kits and safes swing by thirty dollars or more across the year, and the biggest "discounts" often land at prices the same model sold for six weeks earlier. UniverTrack tracks the real price history across retailers, spots fake reductions, and alerts you when it is genuinely the moment to buy.
