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Grace Atkinson
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Published: 9th February 2026 | Reading Time: 7 minutes | Category: Door Hardware Guides
Buying door handles for a whole house, the style question is easy — the function question is where people get stuck. Every internal door needs one of three mechanisms, and choosing the right one per room at the start saves re-buying later. This guide explains all three in plain English.
Latch: the door opens and closes, nothing locks. Bathroom lock: a thumb turn locks from inside, with an emergency release outside. Sash lock: a key locks a proper deadbolt. Every room in the house takes one of these three.
A tubular latch is the spring bolt the handle operates — push the lever, the bolt retracts, the door opens. No locking of any kind. This is the right mechanism for most doors in the house: living rooms, kitchens, landings, most bedrooms. A latch kit bundles the lever pair with a correctly sized latch; latch-and-hinge sets add hinges for newly hung doors.
A bathroom lock adds a deadbolt thrown by a thumb turn on the inside — no key to lose, operable with wet hands — and an emergency release on the outside, turned with a coin, so a locked-in child is a thirty-second problem rather than a removed-door problem. This is the standard for bathrooms and WCs, and increasingly for main bedrooms too. Complete sets live in bathroom door lock sets.
A sash lock combines the everyday latch with a separate key-operated deadbolt in one case. The door works normally all day; turn the key and it is properly locked. Home offices with client paperwork, studies, storage rooms and any room where you control who unlocks it — that is sash lock territory. Keys come with the set; see door handles with lock and key.
The simplest route to a consistent hallway is choosing a handle family offered in several door functions. Selected Hera, Lumina, Spectra and Solace designs are available as passage, bathroom or keyed sets, depending on the finish and handle format. Check each product for the exact set contents, then compare options in the door handles hub.
Pro Tip: Count your doors by function before ordering anything. Walking the house with a notepad for five minutes prevents the classic mistake — a beautiful matching set of handles with the wrong locks in the wrong rooms.
For a like-for-like replacement, measure the existing case length, backset, spindle position, faceplate and fixing layout before ordering. Changing from a latch to a bathroom or sash lock usually requires different door preparation. Follow the selected product instructions and use a qualified installer when the existing mortice or fire-door specification is uncertain.
Decide what each door must do, then compare the functions and finishes available in your preferred handle family. Start with internal door locks and handles for coordinated kits, or use the door handles hub to browse by style.
About Decoranddecor: Leading UK supplier of premium kitchen handles, cabinet hardware, sliding door systems and door furniture. We offer an extensive range of finishes including gold, brass, chrome, black, and nickel to transform your home.
Buying door handles for a whole house, the style question is easy — the function question is where people get stuck. Every internal door needs one of three mechanisms, and choosing the right one per room at the start saves re-buying later. This guide explains all three in plain English.
The Three Mechanisms at a Glance
Latch: the door opens and closes, nothing locks. Bathroom lock: a thumb turn locks from inside, with an emergency release outside. Sash lock: a key locks a proper deadbolt. Every room in the house takes one of these three.
1. The Latch: Doors That Just Open and Close
A tubular latch is the spring bolt the handle operates — push the lever, the bolt retracts, the door opens. No locking of any kind. This is the right mechanism for most doors in the house: living rooms, kitchens, landings, most bedrooms. A latch kit bundles the lever pair with a correctly sized latch; latch-and-hinge sets add hinges for newly hung doors.
2. The Bathroom Lock: Keyless Privacy
A bathroom lock adds a deadbolt thrown by a thumb turn on the inside — no key to lose, operable with wet hands — and an emergency release on the outside, turned with a coin, so a locked-in child is a thirty-second problem rather than a removed-door problem. This is the standard for bathrooms and WCs, and increasingly for main bedrooms too. Complete sets live in bathroom door lock sets.
3. The Sash Lock: Locking With a Key
A sash lock combines the everyday latch with a separate key-operated deadbolt in one case. The door works normally all day; turn the key and it is properly locked. Home offices with client paperwork, studies, storage rooms and any room where you control who unlocks it — that is sash lock territory. Keys come with the set; see door handles with lock and key.
Room-by-Room Defaults
- Living rooms, kitchens, landings: latch kits.
- Bathrooms and WCs: bathroom kits with thumb turn and release.
- Main and teenage bedrooms: latch or bathroom kit, by preference.
- Home offices, studies, storage: sash lock sets with keys.
One Look, Three Functions
The simplest route to a consistent hallway is choosing a handle family offered in several door functions. Selected Hera, Lumina, Spectra and Solace designs are available as passage, bathroom or keyed sets, depending on the finish and handle format. Check each product for the exact set contents, then compare options in the door handles hub.
Pro Tip: Count your doors by function before ordering anything. Walking the house with a notepad for five minutes prevents the classic mistake — a beautiful matching set of handles with the wrong locks in the wrong rooms.
Replacing vs First Fitting
For a like-for-like replacement, measure the existing case length, backset, spindle position, faceplate and fixing layout before ordering. Changing from a latch to a bathroom or sash lock usually requires different door preparation. Follow the selected product instructions and use a qualified installer when the existing mortice or fire-door specification is uncertain.
Function First, Then Finish
Decide what each door must do, then compare the functions and finishes available in your preferred handle family. Start with internal door locks and handles for coordinated kits, or use the door handles hub to browse by style.
About Decoranddecor: Leading UK supplier of premium kitchen handles, cabinet hardware, sliding door systems and door furniture. We offer an extensive range of finishes including gold, brass, chrome, black, and nickel to transform your home.