What does an extension ladder do?
They do exactly what they say on the tin: extend so you can reach high points, whether in and around your home or across a large construction zone. When you see them in the shops, extension ladders appear only about half their full size. Comprising two parts, the 'base' remains stationary while the 'fly' slides to reveal the ladder’s increased size.
There are around twenty different criteria that set models and grades of extension ladders apart. Many longer ones owe their extending capabilities to rope running up their centres. Every model has its own 'shoes', where the side-rails meet the ground. Factors like material, swivel, length, and width of these shoes all have a bearing on safety, quality, and price. It is also important to note that the shape and construction of the rungs both make a difference, as does the type of side-rail attachment. If an extension ladder has an abundance of special features and accessories, its quality and cost are likely to be increased too.