When it comes to replacing your windows, the glass really does make a difference. Glass will typically make up 70% of your window and is at the heart of controlling the flow of natural light, the level of safety and security, of heat retention and even the level of furniture fade protection. Choosing the right glass for your home will have a huge impact on the performance of your windows, so it’s important to get it right. Government Building Regulations require us to use energy efficient products that help to reduce CO2 emissions and protect the environment. Planitherm is the UK’s leading energy efficient glass and our full range can be incorporated into any style of window frame.