Composite doors are designed using multiple materials that work together to provide superior strength, insulation and durability. Unlike traditional timber or UPVC doors, composite doors feature a reinforced core – often made of high-density polyurethane foam – and an outer skin made from GRP (glass-reinforced plastic). This combination gives the door excellent resistance to warping, cracking and moisture. The result is a door that looks like timber, performs like a modern insulated unit, and requires far less maintenance over time.
We are proud to supply and install the Apeer range – one of the most advanced composite door systems on the market. Built using fibreglass (GRP) and high-density polyurethane, Apeer doors offer market-leading security and exceptional energy performance. Apeer doors come with an extremely efficient double rebate system, providing extra draught protection and sound insulation. Many models can be specified to meet the A-rated energy rating, making them ideal for energy-conscious households.
With dozens of styles, colours and glazing options available, Apeer doors suit everything from contemporary new builds to traditional stone cottages. Matching side panels and custom ironmongery can also be included to complete the look.
Alongside the Apeer collection, we also offer a carefully selected range of composite doors from Diamond, Rockdoor, and Silka – each with its own unique design and performance features. Diamond composite doors are known for their robust construction, classic design choices, and reliable thermal insulation.
Rockdoor has developed a strong reputation for home security. These doors feature a unique internal construction and steel reinforcement to resist forced entry, making them one of the most secure front door choices available.
Silka doors stand out with their smooth matte finishes, flush styles, and minimalist detailing – perfect for homeowners seeking a modern, high-end appearance without losing performance benefits.
No matter which style or brand you choose, our team will help guide you through the selection process and make sure the end result matches your home’s character and your practical needs.
All our composite doors are fitted with high-security locking systems, and we proudly offer Ultion locks for maximum protection. Ultion is one of the most respected names in door security, offering advanced anti-snap and anti-bump cylinder technology. Should an attempt be made to force the lock, Ultion automatically enters “lockdown mode” – protecting the core of the lock and preventing further access. It’s the ideal choice for homeowners who want real peace of mind.
Living in Cumbria and the South Lakes means being prepared for unpredictable weather – from driving rain and strong winds to freezing temperatures. Our composite doors are specifically designed to deal with this. The doors we supply feature double or triple-sealed rebates to eliminate draughts, keep out moisture, and reduce heat loss. They are highly weather-resistant and do not swell, warp or discolour – even when exposed to constant rain and temperature changes.
Thanks to their insulated cores and expertly fitted frames, composite doors help regulate the temperature inside your home, keeping you warm in winter and cool in summer.
We offer composite doors in a wide variety of colours and finishes – from traditional woodgrain effects in oak, rosewood and black, to contemporary greys, blues, and statement tones. Hardware options, including handles, knockers and letterplates, are also available in a choice of finishes to complement your home’s exterior. Whether you want a glazed panel for natural light, a solid door for privacy, or a door with side panels to create a more welcoming entrance, we’ll help you choose the right combination.
South Lakes Windows Ltd installs composite doors across Kendal, Windermere, Lancaster, Morecambe, Kirkby Lonsdale, and the wider South Lakes and Cumbria region. We manage the process from start to finish – including measuring, removal of old doors, professional fitting, and aftercare.
All installations are carried out to the highest standard, with attention to sealing, alignment and finish – ensuring your new door performs exactly as it should from day one.
Request a Free Quote
If you’re looking for a stylish, secure, and energy-efficient entrance door, a composite door from South Lakes Windows Ltd is an excellent choice. Our team is happy to provide advice, show you samples, and offer a free, no-obligation quote. Contact us today to find out more about our composite door ranges and book your home consultation.
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South Lakes Windows Ltd supplies and installs premium quality glazed windows, UPVC and composite doors, conservatories and orangeries across a wide service area covering Lancashire, Cumbria and North Yorkshire.
We work with homeowners in towns and villages across the region, including:
Cumbria: Barrow-in-Furness, Dalton in Furness, Ulverston, Broughton-in-Furness, Penrith, Keswick, Grasmere, Ambleside, Windermere, Coniston, Hawkshead, Kendal, Natland, Staveley, Tebay, Sedbergh, Arnside, Allithwaite, Grange-over-Sands, Cartmel, Lindale, Levens, Milnthorpe, Heversham, Holme, Witherslack, Dent, Cark and Flookburgh, Newby Bridge.
Lancashire: Preston, Lancaster, Garstang, Morecambe, Heysham, Clitheroe, Ribchester, Poulton-le-Fylde.
North Yorkshire & Border Areas: Settle, Ingleton, Kirkby Lonsdale, Burton-in-Kendal, Burton in Lonsdale, Bentham.
We also work throughout the wider South Lakes area and regularly take on projects across the Lake District National Park. If you’re unsure whether we cover your location, just get in touch with our team – we’re always happy to help.
