Our Products

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. These are relationships that we’ve built over forty years and they enable us to meet your exact design requirements, while delivering on energy performance and security.

Choosing Sierra streamlines the entire fabrication process. We offer support and advice at the planning stage and then you can leave it with us until delivery. Whether you need windows, doors or a conservatory, we provide everything under one roof and deliver anywhere in the UK.

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About Us

We’ve been manufacturing windows from our factory in Devon since 1976, and we’ve earned a reputation for delivering on our promises...

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We’re here to help. Get in touch for professional advice from the UK’s leading PVC-U window and door manufacturers…

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Supporting your business

Discover how to order customisable marketing materials and boost your sales…

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BS7412 KM12887
BS741-PAS24 KM505822
BS7412-PAS24 KM33527

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