How to install a baby gate: top of stairs, doorway, banister and the baseboard problem

Before you start: measure and find wood

Measure the opening at the height the gate's latch will sit, wall to wall or wall to post, and write it down. Measure again at hinge height; walls are rarely parallel. If there is a baseboard, measure from baseboard face to baseboard face too, because the brackets or pressure pads will sit on whatever surface is proud. Then run a stud finder along the wall side at the two bracket heights and mark the stud center. A hardware gate that misses the stud is screwed into half an inch of gypsum, and a toddler will find that out before you do. If there is no stud where the gate needs one, either move the gate's bracket height to where the stud is (most manuals allow a range) or use the drywall anchor kit the manufacturer sells; Cardinal sells one for the SS-30. Do not use the plastic plugs from a picture-hanging kit.

Installing a hardware gate (top of stairs)

The numbered steps are in the box above and in this page's structured data. Three things the manuals say quietly and people miss. The swing. A top-of-stairs gate must open toward the landing only. Cardinal ships an optional one-way stop bracket; KidCo builds a stop pin into the Safeway; North States gives the Easy Swing & Lock a swing-direction control and makes never swinging over the stairs a condition of stair use. Set it on install day. The angle. If the two mounting surfaces are not parallel, only some gates can cope: the Cardinal SS-30 mounts at up to 30 degrees on the hinge side. Forcing a non-angle gate onto an out-of-square opening puts the latch in a bind and it will not fully engage. The gap. The manual gives a maximum gap between gate and frame when closed, usually under 2.5 inches, because a bigger gap is an entrapment opening. Set the latch catch to that number, not to “looks fine.”

Installing a pressure gate (doorway)

Unbox it, fit the extension if the opening needs it, and set the gate in the doorway with the pressure pads against the walls. Tighten the tension knobs until the gate does not move when you push it, and check the door latches cleanly. Then do the step the box does not mention and the standard does: screw the wall cups in. When the CPSC adopted ASTM F1004-22 the change it explained was moving this warning onto its own label: “You MUST install wall cups to keep the gate in place. Without wall cups, child can push out and escape.” Back the tension off, hold each cup where the pad sits, mark, pre-drill, screw, and re-tension with the pads inside the cups. Munchkin's instruction sheet makes all four cups a condition of any stair use; at the bottom of the stairs, that is your install. Never at the top: see pressure-mounted vs hardware-mounted baby gates.

The baseboard problem

Baseboards stick out from the wall by half an inch to an inch, and the bottom bracket or pad of a gate lands on them while the top lands on the wall. The gate then sits tilted, the latch binds, and pressure pads only contact at the edge. The fixes: spacers (Perma ships them with its retractables; some hardware gates include them), mounting the lower bracket above the baseboard where the manual allows, or a small block of wood screwed to the wall above the baseboard to bring the upper surface out flush. Regalo publishes different opening ranges for zero, one and two baseboards because the baseboard changes the effective width; measure accordingly.

Banisters

A newel post is not a wall. Either use a gate with a banister kit or strap on an adapter, then treat the adapter face as the wall in the steps above. The adapter adds its own width to the opening. All of it is in baby gates for banisters; the case where the far side is nothing at all is in baby gate for stairs with one wall.

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