As the evenings get darker, more homeowners start thinking about how secure their house really is. Most break-ins are opportunistic: someone tries a door handle, forces an old window or snaps a cheap lock cylinder in under a minute. The good news is that modern windows and doors, specified and fitted properly, make a house a far harder target. Here is what actually does the work, and what to ask about when you are getting a quote.

Multi-point locking: the backbone of a secure door

Older doors often relied on a single deadlock near the handle. Lift the handle on a modern uPVC, aluminium or composite door and you engage a multi-point lock instead — a steel strip running the height of the door that throws hooks, rollers or bolts into keeps along the frame at several points at once.

That matters because a door locked at one point can be levered at the top or bottom corner. A door locked at three to five points along its length spreads the load across the whole frame, so there is no weak corner to attack. The same principle applies to French doors, where the secondary leaf should shoot bolts into the head and the threshold, not just rely on the main leaf to hold it shut.

The cylinder is the part burglars target

On most uPVC and composite doors the key cylinder is the single most vulnerable component. Cheap euro cylinders can be "snapped" at a weak point in the middle, exposing the mechanism so the lock can be turned without a key. It is a well-known technique and it is fast.

When replacing a door, or even just upgrading an existing one, ask for an anti-snap cylinder with a recognised security rating — cylinders tested to standards such as TS 007 (three-star) or SS312 Diamond are designed to resist snapping, drilling, picking and bumping. It is also worth making sure the cylinder does not stick out past the handle, and that the handle itself is a security handle rather than a basic one. This is one of the cheapest, most effective security upgrades you can make.

Windows: locking handles, hinges and restrictors

A modern casement window should close onto multiple locking points around the sash, not just a single catch by the handle. Key-locking handles add another layer, particularly on ground-floor windows and anything that can be reached from a flat roof, porch or extension.

Hinges matter too. Security friction hinges are designed so the sash cannot be prised off from outside, and internally beaded glazing means the glass is held in from the inside, so it cannot be removed by stripping beads from the outside. On older windows, externally beaded units are a genuine weak point.

Restrictors are useful on upstairs windows for child safety and ventilation, but bedroom windows used as escape routes must still open fully in an emergency. A good installer will balance security against fire safety rather than locking every window shut.

Glazing: toughened vs laminated glass

Toughened glass is heat-treated so it is much stronger than ordinary glass and, if it does break, shatters into small blunt pieces. It is a safety glass and is required in many locations, such as doors and low-level panes.

Laminated glass goes a step further for security. It sandwiches a tough interlayer between two sheets of glass, so even when the glass cracks it stays in one piece and holds together. Getting through it takes time and makes noise — exactly what a burglar wants to avoid. It is worth considering for glazed front doors, side panels next to a lock, patio doors and ground-floor windows that are out of sight from the road. It also cuts noise and filters UV light, which is a nice side benefit.

Patio, sliding and bi-fold doors

Large glazed doors at the back of the house are often the least overlooked part of a property, so their security spec matters. On sliding doors, look for anti-lift features that stop the sliding panel being lifted off its track, plus multi-point locking on the meeting stiles. On bi-folds, check that the hinges are secure and the locking engages top and bottom on each leaf. Our patio doors guide covers how the different systems compare more broadly.

What insurers typically look for

Every policy is different, so always read your own wording, but insurers commonly ask whether external doors have secure key-operated locks and whether accessible windows lock. Some policies require specific lock types to be fitted and used for theft cover to apply, and some reduce premiums where an alarm is fitted. If your windows or doors are being replaced, keep the product details and installation paperwork — it makes answering insurance questions straightforward and shows what was fitted and when.

Installation makes or breaks security

The best lock in the world does little if the frame is loosely fixed into the opening or packed badly. A door that has dropped or a window that has twisted will not engage all its locking points properly, and people end up leaving it unlocked because it is awkward to close. Correct fixing, packing and adjustment is what makes the hardware work as designed — and it is why a door that has become stiff to lock deserves attention before it turns into a security problem.

Getting a secure spec for your home

KRB Construction & Windows Ltd supplies and fits windows, patio doors and composite front doors across Galway City and County, specifying the locks, cylinders and glazing to suit each opening. If you want to upgrade security as part of a replacement project, explore our windows and doors service, request a quote — or a door quote for entrance doors — or get in touch to talk through the options.