Here is a brief guide on ladder. The quite versatile ladder is the rigid ladder, and it’s often used for many tasks. There are many kinds of rigid ladders, from the fixed type to the roof ladder type. The most basic of ladder types is the fixed ladder; it has no moving parts. Extension ladders are often composed to two ladders where one can retract into the other for easy storage. Joined by a hinge at its top, and often forming an inverted V, are step ladders. If you need some space to place things like paint cans, you might need a platform ladder, which has a platform at the top. If you must climb up the roof or do some outdoor house painting, you need a roof ladder, which has a hook at the top, for easy latching on the roof. Aluminium is the preferred material for ladders, except those used for electrical work, for which fibreglass ladders are used.