How to Position an
Extension Ladder Safely

Knowing how to position an extension ladder safely is one of the most important skills any DIYer or tradesperson can have. This guide covers the practical detail that often gets skipped: what to do when the ground isn't level, how to secure the ladder properly, and how to stay stable while you're actually working. Get it wrong and the consequences can be serious — according to the HSE, falls from height accounted for 35 of the 124 worker fatalities recorded in Great Britain in 2024/25, with ladders among the most common pieces of equipment involved.

Whether you're painting a fascia board, clearing guttering, or accessing a roof, the same extension ladder positioning principles apply.

Why Ladder Positioning Goes Wrong

Most people know there are rules around ladder angles and footing, but knowing a rule and applying it in a real garden or on a real driveway are two different things. The ground is rarely perfectly flat. The surface isn't always firm. The wall or structure you're leaning against may not offer a clean, solid contact point.

The Ladder Association reports that the majority of ladder incidents investigated involve incorrect setup rather than equipment failure — most commonly an incorrect extension ladder angle or unsecured feet on uneven ground. That uncertainty is more common than people admit. Real-world conditions demand real-world solutions, not just a reminder to check the angle.

The good news is that the principles are straightforward once you understand the reasoning behind them — and once you know what to look for before you even extend the ladder. The HSE's guidance document INDG402 and the Ladder Association's Code of Practice both reinforce the 1-in-4 rule as the UK industry standard.

How to Position an Extension Ladder Correctly

The 1-in-4 Rule

The most important starting point is the angle of the ladder. The standard guidance is a 75-degree working angle, which in practice means placing the ladder's feet one unit out from the wall for every four units of height. So if the top of the ladder reaches 4 metres up the wall, the feet should sit 1 metre out from the base of that wall.

This ratio keeps the ladder stable under your weight. Too steep and it can topple backwards; too shallow and the feet are likely to slide outward. A quick way to check: stand at the base with your toes touching the feet, extend your arms straight out — your palms should rest flat on the nearest rung. If they don't, adjust the angle before climbing.

Choosing and Preparing the Right Surface

Before setting the feet down, assess the ground beneath you:

Hard, level surfaces (concrete, paving slabs) are the easiest to work with. Make sure the feet aren't sitting on loose grit or debris that could act as a lubricant between the rubber foot and the surface.

Soft ground (soil, lawn, bark) is trickier. The feet can sink unevenly, especially under load. Use a ladder foot board — a flat, wide board that distributes weight across a larger area — and check that both feet are bearing evenly before you climb. Drive a stake into the ground in front of the board if conditions are particularly soft or if you're working for an extended period.

Slopes and uneven ground are where most problems start. If you're working on a slope, use adjustable ladder levellers fitted to the stiles. Do not stack bricks or pieces of timber under one foot — this is an improvised fix that introduces unpredictable movement. Ladder levellers UK-approved designs are purpose-built for this situation and will keep the feet secure without guesswork.

Securing the Top of the Ladder

The feet are only half the story. The top of an extension ladder must also be stable, and this is where many people take shortcuts they shouldn't.

Where possible, tie the ladder to a fixed anchor point at the top — a ladder tie or strap looped around a solid structural element works well. If you're working on a gutter or fascia, avoid resting the stiles directly on plastic guttering: it can crack under load and gives the ladder nothing solid to grip. Instead, use a ladder stand-off (also called a ladder stay), which holds the ladder away from the wall and creates a stable two-point contact on either side of the obstacle.

If you cannot tie the top of the ladder, you need a second person to foot the ladder from below, holding the stiles firmly with both hands and keeping their weight forward. This isn't just a nice-to-have; for any work where tying off isn't possible, it's the correct approach.

Extending the Ladder to the Right Height

Extend the ladder so that the top section overlaps the lower section by at least three rungs. This overlap gives the ladder its load-bearing strength — reduce it and you risk the extension buckling under your weight. The top of the ladder should extend at least 1 metre above the landing point or working area when you're using it for roof access, giving you something to hold as you step off.

Lock the extension clips before climbing and give the ladder a firm shake test at ground level. Any lateral movement at the top should be addressed before anyone goes up.

Working Safely Once You're on the Ladder

Positioning doesn't end when you start climbing. Maintaining stability while you work is equally important.

Keep your hips between the stiles at all times — your body should not swing out beyond the side rails. This is sometimes called the "belt buckle rule": if your belt buckle passes beyond either stile, you've overreached and the ladder's centre of gravity is compromised.

Keep three points of contact where possible: two feet and one hand, or two hands and one foot. When you need both hands free — to paint, drill, or clear a gutter — use a ladder tool tray or hook to hold your equipment rather than carrying it in one hand.

Avoid twisting your torso to reach objects to the side. Climb down, move the ladder, and climb back up. It takes an extra two minutes and eliminates a significant proportion of ladder-related incidents.

Do not stand on the top three rungs of the ladder. These rungs are for grip only — your highest safe standing position is the fourth rung down from the top of the extended section.

Quick Positioning Checklist

Use this checklist every time before and during a climb:

• Angle set to 75° — feet placed 1 unit out for every 4 units of height (the ladder 1-in-4 rule)

• Feet clear of debris — no loose grit, mud, or material under the rubber feet

• Levellers fitted if on a slope — never improvise with bricks or timber

• Top tied or footed — ladder secured to a solid anchor point, or a second person footing from below

• Minimum 3-rung overlap — between upper and lower sections of the extended ladder

• Extension clips locked — confirmed before climbing, not just checked from the ground

• Three-point contact maintained — two feet and one hand, or two hands and one foot, at all times

• No standing above the fourth rung from the top — the top three rungs are grip points only

Choose an Extension Ladder from Ramsay Ladders

Browse Ramsay Ladders' full range of EN 131-rated extension ladders — including the stand-offs, levellers, and foot boards covered in this guide — or contact our team if you need help matching a ladder to your working height and site conditions.

Frequently Asked Questions