Define Doors

Our Define aluminium windows beautifully capture the timeless charm of classic ‘putty-line’ timber windows, a beloved feature of British homes for over 200 years. The term ‘putty-line’ comes from the old method of securing glass with pins and putty, which not only served a practical purpose but also created an iconic look. Today, this elegant style continues to enhance a variety of homes, from quaint countryside cottages to stylish suburban townhouses—even modern properties. With their refined bevelled sash, these windows offer the character of traditional timber but with the benefits of durable, low-maintenance aluminium. They’re the perfect blend of heritage and innovation, bringing classic beauty and modern convenience together effortlessly.