Sierra Windows

At Sierra Windows, we've been creating bespoke frames from our factory in Devon since 1976. Today, we combine good old-fashioned customer service with new and innovative solutions that have the power to transform homes and workplaces. You can leave it with us. By choosing Sierra Windows, you'll have access to a wide range of suppliers, many of whom will only work with larger businesses like ours. This enables us to offer everything you need under one roof. Each frame is crafted to order right here in Devon, and nothing leaves the factory floor until it meets our exacting standards.

We're a UK-based company specialising in made-to-order windows, doors and conservatories, and we've earned a reputation for delivering on our promises. Thanks to the comprehensive expertise of our craftsmen and the support of our knowledgeable customer services team, we've become a trusted partner to the businesses we work with. But we don't rest on our laurels. We're staying ahead with new and ingenious energy saving techniques, we've just introduced new foils and finishes to meet the requirements of modern builds, and we're introducing new technologies and processes, so that we can continue to deliver the most efficient service possible for our customers.

Create the perfect finish with a casement that sits flush against the frame. Thanks to its sleek and minimalist design, a flush casement window can help you achieve that traditional country home aesthetic, without compromising on energy efficiency, security or weatherproofing. We manufacture everything under one roof, so we can create a solution that meets your exact requirements. Your client could choose a charming French-style window or opt for Georgian bars inside and out. We can also deliver your window unglazed, double glazed or triple.

Increase your product offering with beautifully crafted conservatories from Sierra. We work closely with top conservatory and roof specialists to provide a complete design to delivery service - so there's no need to dual source. Sierra conservatories are available in a range of styles, including the popular gable, the classic Victorian and the highly sought after lantern style. Each style is fully customisable, with a wide range of colours, glazing options and door styles to choose from. Your customer could opt for a contemporary bi-folding door to separate their new living space, or choose a classic and stylish French door to lead out into their garden - you can explore all of the options on the 'doors' tab.

Traditional sash windows look the part, but they are not typically very energy efficient. Our vertical sliders are different. They're crafted to deliver the traditional style often required in conservation areas, while preventing drafts and delivering A-rated efficiency. When it comes to designing the perfect frame, it's the details that make all the difference. You could opt for period features, such as horn detailing on the opening or Georgian bars that give the impression of individual panes.

The classic and popular casement window combines traditional style with modern essentials - exceptional security, thermal efficiency and weatherproofing. Our casements are 70mm deep and feature sleek five-chambered profiles with dedicated beads to ensure a consistent shape. We build each frame from scratch, so we can design a solution that meets your exact requirements - whether you're creating a focal point in a workspace or improving the EPC of a period property. We can create a sleek chamfered frame or an elegantly sculptured shape to suit different property styles.

Patio doors transform spaces by letting in large amounts of light and creating synergy with the outside world. Each of our patio doors is fitted with an easy glide track for effortless opening. They are available in 2, 3 or 4 pane sizes and there's even the option to include a midrail and letterbox, meaning a patio door can be used as the main entrance. All of our doors are independently tested to ensure they meet industry standards. And because security matters to your clients, they can be designed to meet the requirements of Secure by Design.

Whether you're searching for a frame that simplifies fitting, a casement to lower EPC, or the option to offer increased security for your clients - each and every Sierra frame is built from scratch to your exact specifications. We can design virtually any frame for any installation. We use 70mm internally glazed PVC-U windows and offer an extensive range of styles and opening features. To make your job easier, you could opt for a pre-applied gasket integrated system, which features fitter-friendly click fit beads.

Sierra has been crafting high quality windows from its purpose-built factory in Devon since 1976, and that's a legacy we're incredibly proud of. Over those forty years, we've discovered just about everything there is to know about windows, doors and conservatories and we'd love to pass that knowledge on to you. Our technical support team is always on-hand to help. Whether you have a query about measurements, want to know more about the latest energy-saving technology, or you need a few simple tips ahead of a fit, just give us a call.

We believe that what we do has the power to transform homes and workplaces, and we're proud of the role we play in that process. We build each of our frames from scratch, thoroughly testing them to ensure they comply with all industry regulations and checking them by eye at every stage of production. This attention to detail ensures that 99.1% of our deliveries are on time and complete. There's no need to dual or triple source. We partner with a range of suppliers, including glassmakers, so that you benefit from a complete design to door service.

A composite door is made from multiple different materials that work together to deliver increased security, strength and thermal efficiency. They're ideal for clients looking for a low-maintenance alternative to a traditional timber door. We make both GRP (glass reinforced plastic) and thermoplastic composite doors. Each of these solutions has its benefits, so we've created a simple guide to help you recommend the best solution every time. Of course, if you'd like further advice, please feel free to give our team a call.

From composite doors in eye-catching colours and contemporary bi-folding styles that maximise on space, to hardwearing, low-maintenance PVC-U; each and every Sierra door is made to measure, so it's guaranteed to keep the sound out and the warmth in. Sierra doors are independently tested to ensure they comply with (and often exceed) industry standards. They are thermally efficient, high quality and available in a range of sizes, colours and with a choice of threshold. We can even manufacture your door to meet the requirements of the police-backed initiative, Secure by Design.