Standard wash hand basins are usually supplied with a pedestal with a width of 500mm or more. Cloakroom basins tend to be quite a bit smaller and usually hung directly on the wall using special brackets. As well as cloakrooms they are also frequently used in very small bathrooms and en-suite bathrooms.
When installing a cloakroom basin you should try to ensure that the supply and waste pipes can be fed from behind, because there is no pedestal to hide any of the pipework. If space is very tight, a corner basin is sometimes the best option. They take up very little wall space and are usually hung directly on the wall so the same rules apply regarding pipework.
Some cloakroom basins are available with a semi-pedestal which can help hide some or all of the pipework. The bracket that holds the basin to the wall needs to be anchored very securely as all of the weight rests upon it. The basin will usually come supplied with large masonry bolts - if not check with your supplier on the best type of fixing to use. The cloakroom wall chosen to mount the basin upon needs to be structurally sound. Holes will need to be drilled through bathroom tiles and if UPVC wall panels are used then suitable packing will need to used to ensure the panels do not crush under strain.
Glass basins are now very popular and are available in a variety of shapes and styles. There are some very neat models which can be incorporated into a cloakroom or en-suite design - there are a few designs of glass basin that can be installed into the corner of the room, which can help when spce is at a premium.
Cloakroom vanity units are designed to be small and very neat as most cloakrooms would not be large enough to allow for a full size unit to be fitted. They are commonly supplied as a complete unit with a moulded cloakroom basin made specifically for the base underneath.