Choose your sofa bed mechanism
There are several different sofa bed mechanisms to choose from. The one you choose depends on how often you think it'll be used as a bed and on how much room you have.
Two-fold sofa bed
The most traditional type of sofa bed, the two-fold sofa bed has a bed base and mattress that's hidden beneath the sofa cushions. It simply pulls out and unfolds in two movements. The mattress of a two-fold sofa bed is folded only once so it can be slightly thicker and is better suited to more regular use.
Three-fold sofa bed
The three-fold sofa bed works in exactly the same way as the two-fold sofa bed, but because it unfolds in three movements the mattress is folded twice and therefore has to be slightly thinner.
Roll-out sofa bed
The bed in this type of sofa bed rolls out from the back of the sofa in an easy, smooth action. You don't need to remove the seat or back cushions first, as everything rolls out together. The cushions are automatically stored under the bed surface.
Trundle or pull out sofa bed
This type of bed simply slides out on casters or wheels from under the sofa base. It's a good solution for a small space as you don't have to find room for the sofa seat and back cushions - they simply stay on the sofa.
Clic-clac sofa bed
This sofa bed converts from an armless bench-style sofa to a bed. The name clic-clac - you may also see it written as clic-clack - refers to the sound the two-step locking mechanism makes as it folds flat. This type of sofa bed is a good solution if your living space is more compact.