Time For Change! Neighbors or friends who have an extra key might not have kept it safe or you may have forgotten to retrieve a spare key from tradesmen. Similarly, if you’ve ever left a key under the doormat or in a plant pot, it’s possible for someone to make a copy and return it to your hiding place, without you ever knowing it was gone. For peace of mind, security experts recommend that you change your front door locks every five years. However, when 'changing the locks', you often only need to change the cylinder, rather than the lock itself. By simply upgrading the rim cylinder in a nightlatch, or the euro profile cylinder in a multi-point lock, your home can be secure in less than 10 minutes. The security experts at Yale have come up with four things to bear in mind if you want to change your cylinder, so you can be sure your lock is secure and no one else holds the key. 1. Meet the standard – To be sure your door is secure, look for cylinders with the British Standard. All Yale cylinders are rated against the British Standards and are graded for the level of security, safety, corrosion resistance, durability and category of use. 2. What’s your type? – The type of cylinder you choose depends on what type of door you have. External timber doors can be secured using a nightlatch with a rim cylinder. If you have a PVCu or composite door, then you will need to upgrade the euro profile cylinder in the multi-point lock. 3. Size matters – Before you buy you’ll need to know what size you require, this is easy for a rim cylinder as they are all a standard size. If you have a multi-point lock you will need to measure the euro profile cylinder in two halves from either side of the cylinder’s 10mm centre section. Whenever you fit a cylinder, it should be flush with the door furniture, especially on the door’s exterior.