Your windows need to be replaced if they are broken or are no longer energy efficient. Signs to look out for include windows that are letting in draughts and cold air despite being closed, condensation and visible damage like cracks. The effects of these can be detrimental to your home – you might find that your furniture wears out more quickly due to its exposure to UV light, and dampness begins to form around your room. As a result, it is best to get your windows replaced immediately by a professional if you notice any of these signs.