Quick answer

A safety gate that won't stay closed is almost always a leveling or tension issue. Start by checking if the gate is level and the locking mechanism is aligned. If the gate is pressure-mounted, adjusting the tension cups or adding a fitting kit for uneven surfaces often solves the problem.

Check the Gate is Level

A gate that is not level will often swing open or fail to latch. Use a spirit level on the top rail of the gate. If the bubble is not centered, loosen the mounting cups or brackets slightly, adjust the gate, and retighten. For pressure-fit gates, an unlevel installation can also cause the tension to slip over time.

Inspect the Locking Mechanism

If the gate is level but still won't stay closed, the latch or lock may be misaligned or obstructed. Look for dirt, paint, or debris in the latch receiver. Clean it with a dry cloth. If the latch is adjustable, move it slightly to better align with the catch. A sticking lock can also be caused by a worn spring; if cleaning and adjustment don't help, the lock assembly may need replacing.

Tension and Surface Issues

Pressure-fit gates rely on tension against the walls or banisters. If the gate won't stay closed, the tension may have loosened. Tighten the tension cups or knobs according to the manufacturer's instructions. Uneven surfaces like skirting boards or curved stair posts can prevent a good seal. In these cases, a universal fitting kit creates a flat mounting surface, allowing the gate to close properly.

Diagnosis: Why your gate won't stay shut

  • Symptom: The gate swings open or the latch doesn't catch. Observe whether the problem happens every time or only after the gate has been used several times.
  • Likely cause: The gate is not level, the tension has loosened, or the mounting surface is uneven (e.g., skirting board or round stair post). A spirit level check and a visual inspection of the mounting points will tell you which cause applies.
  • Corrective action: Level the gate, tighten the tension cups, or install a universal fitting kit to create a flat mounting surface. After each adjustment, test the gate by closing it several times. If the latch clicks cleanly, the fix worked.
  • When to stop or choose another option: If the gate still won't close after leveling and adding a fitting kit, the lock mechanism may be worn. At this point, consider replacing the gate or contacting the manufacturer for a replacement part. A gate that cannot be adjusted to close securely is no longer safe for use.

Products that can help

  • Fred Safety Universal Stairpost Fitting Kit - Pure White: Compatible with any safety gate, the Fred Universal Stairpost Fitting Kit is a flexible, no-screw solution for installing a stair gate. Provides a secure flat surface for your gate to be fitted to, it’s the perfect universal kit. Suitable for all stair posts, these can fit against the trickiest of stair posts, newel posts and balusters of all sorts of shapes and sizes. Uniquely designed offering damage free… If your gate is mounted on a round or oddly shaped stair post, this kit creates a flat vertical surface so the gate can close flush and latch correctly.
  • Fred Safety Universal Wall & Skirting Kit - Dark Grey: The Wall & Skirting Kit provides a flat, vertical surface, designed to be fitted over all skirting and sloping walls – perfect for any gate! Universally designed to work with any type of safety gate. The perfect versatile solution, this kit can fit over any skirting that is a maximum 18.5cm high and 2.3cm wide. Discreetly designed, to blend effortlessly into your home. Made from lick and bite safe materials. A gate mounted over a skirting board often sits at an angle, preventing the latch from engaging. This kit bridges the gap and gives you a flat, stable surface to mount against.