Emergency glaziers will board up broken windows and doors in your property or change the locks for your safety. They will often offer a 24 hour service. While your replacement glass is on order, boarding up is required for the security and saftey in your property. Common failures are purely general wear and tear or resulting from a lack of maintenance. A local locksmith or glazier can rectify the problem on multipoint mechanisms quickly, and usually that same day as parts are normally weasy to aquire.