Baby gate safety comes down mostly to matching the mounting type to the specific location — one placement in particular has a clear, well-established safety rule worth knowing before buying.
The rule that matters most: mounting type by location
Pressure-mounted gates hold themselves in place using tension against the surrounding walls or door frame, requiring no drilling — convenient and damage-free, and appropriate for doorways or openings between rooms on the same level. Hardware-mounted gates are physically screwed into the wall studs or banister, making them significantly more secure and much harder to dislodge under force.
The safety consensus here is clear and consistent: pressure-mounted gates should never be used at the top of a staircase. A pressure-mounted gate relies entirely on friction, and a child pushing, leaning, or falling against it can dislodge it — turning a safety device into the cause of a fall down the stairs rather than the thing preventing one. For the top of any staircase, a hardware-mounted gate is the safe choice, without exception. Pressure-mounted gates remain a reasonable, safe option at the bottom of stairs or in doorways connecting same-level rooms, where a dislodged gate doesn't create a fall hazard.
When to start using gates
Many pediatric safety guidelines recommend installing gates at both the top and bottom of stairs once a child begins crawling, generally sometime between 6 and 24 months, and keeping them in place until a child can reliably and safely navigate stairs on their own — which varies by child rather than hitting on a fixed date.
Walk-through vs. step-over gates
A walk-through gate has its own opening mechanism (usually a latch a child can't easily operate), letting an adult pass through without stepping over the gate itself. A step-over gate has no opening mechanism at all, requiring anyone passing through to physically step over it — a real trip hazard, particularly for an adult carrying a child, laundry, or anything else that blocks a clear view of their feet. Walk-through gates are generally the safer choice for regular daily use; step-over gates are more of a temporary or occasional-use option.
The one thing people forget
Check the gate's bar spacing and any gaps at the bottom for both entrapment and climbing risk — spacing that's too wide can trap a small child's head or limbs, and large enough footholds or gaps can turn into an accidental ladder for a determined, mobile toddler. A gate that was genuinely secure for a younger baby can become climbable once that same child grows taller and more coordinated, which is worth reassessing periodically rather than assuming a gate stays adequate forever.