There are many instances when rewiring is not only necessary but mandatory. For example, a house that hasn’t been rewired in the past 25 to 30 years and probably needs upgrading or refurbishing.
This will require a complete or partial rewire to make it compliant with the current safety standards in the electrical industry. There is a good reason for this. Modern households have a larger volume of electrical devices and power requirements than houses built in the 80s and 90s. The existing wiring in a 30-year-old house will definitely be strained by the high level of usage of modern devices and could pose danger to your family and property.
You may also require a full or partial rewiring if you intend to do a major innovation in your home that can be defined by the Building Regulations as “material alteration.” The renovation will usually require a complete replacement or upgrade of the fuse board among other things.
If you are extending your rooms or converting your attic or garage, you’ll need to make sure that your new wiring complies with Part P electrical safety of the building regulations. The existing wiring in the rooms being converted will need to be upgraded to ensure that it can safely handle extra loads. The new wiring should also be earthed according to the latest requirements and have the right cross bonding.
When creating more extensions to your home, the existing wiring in parts of your property that are not affected by the extensions may not need upgrading unless specifically indicated as a requirement in the building regulations.