Hi,to stop the dogs running out of the front door I need to be able to put a lock on the living room door,it needs to be lockable/unlockable from both sides,the door has just a handle with no lock at the moment,what do I need to buy?
chances are the door only has lever handles and a small mortice latch. To replace that with a sash lock would need a bit of joinery work to cut mortice out--not so easy on an interior door. Cheapest option is the small brass bolts --around £2. You may need a "necked" one on one side of door and to drill a small hole in frame. The bolt keep on the other side can be a bit awkward to fit because of the architrave. The problem of a bolt on each side is that others can lock you in!