# Why does installation affect window lifespan more than the window itself? Clients often focus on the window itself – the profile, the glazing, the material – but forget an equally important, less visible factor: installation. And that is often what decides whether the windows last 20+ years or cause problems in the very first winter. ## What happens when installation is done wrong? Even the highest quality window will not perform properly if it is not fitted correctly. The most common consequences: - Draughts and cold bridges around the frame, even if the glazing itself is excellent - Moisture and mould caused by poor sealing - Faster wear – the frame can deform if it is not fixed correctly - Higher heating bills – you pay for heat that simply escapes outside ## What does quality installation look like? Proper installation means far more than placing the window into the opening. It includes: - Precise measurements before installation – every house and every opening is different - Correct sealing between the frame and the wall to prevent moisture and cold ingress - Suitable fixings chosen for the wall material and structure - Correct fitting of reveals and sills so water is drained away properly ## How does this affect window lifespan? A correctly installed window can serve for decades without significant problems. A badly installed window – even a high quality one – can cause issues within a couple of years, and fixing them often costs more than proper installation would have cost in the first place. ## Related reading PVC or aluminium windows → 5 common mistakes → Window ordering guide → ## Want to be sure your windows are installed correctly? Book a free consultation – we will assess your home's needs and propose a solution that includes not only quality windows, but professional installation too. Book a consultation