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Composite Doors

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Composite Doors Middlesbrough


When you’re looking for composite doors in Middlesbrough, there’s no place better than Celestial Windows. We have been a market leader in supplying composite doors across Middlesbrough, Teesside and nationwide for decades.


Composite doors are more popular than ever, offering a sturdy, secure, robust and stylish choice to be used for internal or external doorways in your home. A preferred choice for many homeowners due to their durability, strength, security, and thermal efficiency are just a few benefits of composite doors.


At Celestial, we use innovative manufacturing processes and new product development to produce a door range that truly excels in style, performance and delivery. Our range of composite door sets is available in a wide choice of styles, colours and glass options with a performance which outlasts other brands. Our composite doors are made from the strongest materials and available in various styles in colours, so you’re sure to find the perfect composite door for your home


What are composite doors and what are they made of?

So, what is a composite door? And what kind of materials are used to make them? Composite doors are made from a selection of different materials, which can include timber, plastics and uPVC. All of the materials are fused together, resulting in an extremely strong door, making them great for external use!


Composite doors are made up of the following materials:


  • Unplasticised Polyvinyl Chloride (uPVC)
  • Timber Core
  • Insulating Foam Core
  • Glass-Reinforced Plastic (GRP)


No matter if you require modern composite doors for a new build home or more traditional styles for a timeless property, we have a range of colours and designs to choose from!

Composite Door Features & Benefits

Style & Colour:


Our GRP ‘through colour’ doors are available in a choice of nine popular RAL colour finishes including black (beck brown), white and traditional solid wood grain finishes. These are not painted skins, which can be subject to inconsistency in the finish. Each finish is enhanced by the high wood grain definition made possible by our thermoset process.


Double Rebate:


Double rebate doors are easier to install and adjust on-site compared to single rebated doors. The double rebate allows for greater tolerances in movement between the door leaf and frame during installation, just like installing a standard uPVC door. A double rebate feature also means our doors are fully sealed so that we have better protection against water penetration, and improved weather and acoustic performance compared to normal single rebated doors. Single rebated doors require a precise fit and good alignment with equal spacing around the door during installation.




The WHS Halo door is the thickest on the market today at 68mm. In fact 30% more than the standard 44mm offered by other brands. Which makes ours not only much stronger but also gives superior thermal performance with a U value of 0.85Wm2K on a solid door and improved acoustic sound performance.


This is made possible by the high-density polyurethane foam, which forms a solid composite construction to fill the assembly, adding to an almost impenetrable door that is warp-free and weather resistant. It makes ours more energy-efficient, saving the homeowner on heating bills.


Timber-Free Construction:


There is no timber involved. Instead, environmentally friendly uPVC sections with bespoke full steel reinforcement substrates are used for the door skins to be applied to. The advantages compared to doors using a timber substrate is that ours offer greater rigidity with less risk of twisting, swelling, shrinking, rotting or warping of the door itself.


Made to Measure:


The substrate and door skin for each door is cut to size at our factory, which means our doors are made to measure. Timber substrate doors require the fabricator to cut the door to size from a stock hold of standard sizes. Our fabricators are not required to hold stock.


Low Threshold:


Enhance accessibility and aesthetics with our high-performance aluminum low threshold option, designed to accommodate wheelchair users and prams while maintaining a sleek appearance.


British Standards Specification Approved:


Our solid strength doors are British made through and through. Built to give you confidence and built to last. Ours outperform the most stringent and recognised consumer British standards and are manufactured under ISO14001 Environmental Management System licence. All components and extruded parts are manufactured in the UK.


PAS 023 & 024:


Doors pass the latest PAS023 standard at the highest level, which measures a high resistance to air and water penetration*. Doors pass the PAS024 security standard, which measures resistance to a high level against forced mechanical and human entry*.


Our commitment to security is unwavering, with composite doors that surpass PAS023 and PAS024 standards for air and water resistance, as well as resistance against forced entry. Additionally, our doors meet the stringent requirements of ‘Secured By Design,’ recognised by the Association of British Insurers.

Environmental Considerations:


Make a sustainable choice for your home with composite doors designed to reduce energy loss by up to 85% compared to traditional timber doors. Our CFC-free polyurethane foam insulation and timber-free construction minimise environmental impact without compromising performance.


Door Frame:


The foundation of strength lies in our steel-reinforced PVCu profile extrusion door frames, engineered to withstand impact and meet stringent quality standards.


Hardware & Glazing:


Personalise your composite door with our wide selection of decorative glazing options and obscurity levels. All of our options are compliant with Secure By Design standards for enhanced security.


If you’re ready to enhance your home with the unmatched elegance and performance of composite doors, contact the Celestial Windows team today. Visit our showroom in Middlesbrough or get in touch.

If composite doors sound like the best choice for your home  with the Celestial Windows team here today or visit our showroom in Middlesbrough.


Bespoke Composite Doors For You


Celestial Windows proudly presents an exclusive range of top-tier composite doors in Middlesbrough, promising you an unmatched blend of durability, security, and style. Our commitment to excellence ensures that each composite door stands as a testament to quality craftsmanship and innovative design.


Our bespoke made-to-measure composite doors, available exclusively from Celestial, are meticulously crafted to meet stringent security standards while boasting certified thermal performance. Our comprehensive range includes high-quality GRP composite doors and solid-core timber composite doors, ensuring durability and peace of mind for homeowners. With Celestial’s composite doors, you’ll spend less time on maintenance and more time enjoying the elegance of your new exterior door.


Each composite door is meticulously designed with a GRP compression-moulded door skin, perfectly complemented by a timber woodgrain effect and a Polyurethane thermally insulated core. This combination delivers an authentic timber door appearance without compromising on security or energy efficiency.


Endless Design Possibilities


With an extensive range of combinations, Celestial offers a diverse array of composite doors online, catering to various tastes and preferences. From timeless traditional designs to elegant Georgian and Victorian styles, to the contemporary and modern options gaining popularity, our collection encompasses it all.


Choose from an array of secure door locks, hardware suites, standard colours, and bespoke superior colours, including classic shades like black, blue, green, and red, as well as sophisticated options like oak, dark wood, and chartwell green. We also provide custom colour matching services to match any RAL colour for both the door and frame, ensuring a seamless integration with your home’s aesthetic.


Our coloured foil finished frames are designed to complement most profile systems, offering excellent matching options for your existing double glazing. Complete the look with our range of contemporary and modern door hardware, available in chrome, gold, black, graphite (brushed chrome), white, and brushed stainless steel finishes.


With Celestial, you have the freedom to create the perfect composite door that reflects your style and enhances your home’s appeal.


How Long Will a Composite Door Last?

Softwood Door 25 Paint (5 Years) & Yearly Oil 12
Hardwood Door 35 Paint (5 Years) & Yearly Oil 12
Timber Composite Door 30 Paint (5 Years) & Yearly Oil 17
Steel Composite Door 30 Wipe Clean & Yearly Oil 18
UPVC Composite Door 25 Wipe Clean & Yearly Oil 23
GRP Composite Door 35 Wipe Clean & Yearly Oil 33
Aluminium Powder Coated Door 25 Wipe Clean & Yearly Oil 20
UPVC Panel Door 20 Wipe Clean & Yearly Oil 15

Thermal Performance and U Values


Celestial’s robust composite doors delivers an impressive ‘U’ Value of 1.0 and an energy rating of A, ensuring optimal energy efficiency for your home. Meanwhile, our half-glazed composite door achieves a ‘U’ Value of 1.4, providing excellent insulation to help minimise energy costs. These are the most energy efficient offerings as part of our North East Doors range.


With advanced warm edge spacer bar technology incorporated into many of our double-glazed units, our composite doors offer even greater efficiency, resulting in superior energy ratings compared to other options on the market. Not only does this translate to lower energy bills, but it also contributes to a greener environment.


Experience a cosy ambiance year-round with Celestial’s GRP composite doors, providing unparalleled comfort and energy savings.




What materials are composite doors made of?


Composite doors are manufactured using a combination of high-quality materials, including timber, plastics, and uPVC. This blend of materials ensures exceptional strength and durability, making composite doors an ideal choice for external use. Learn more about “what is a composite door” in our dedicated guide. 


How long can I expect a composite door to last?


With proper care and maintenance, composite doors can last for many years, often outlasting traditional timber doors. The durable construction and weather-resistant properties of composite materials contribute to their longevity, providing reliable security and performance for your home. Our doors are built to last, as we use the best materials, hinge types and manufacture them to be durable long term.


What makes composite doors more energy-efficient than other types of doors?


Celestial’s composite doors are designed with advanced insulation features, including a polyurethane thermally insulated core and GRP compression-moulded door skins. This construction helps to minimise heat loss and improve thermal efficiency, resulting in lower energy bills and enhanced comfort within your home.


Can I customise the colour of my composite door?


Yes, Celestial offers a wide range of colour options for composite doors, including classic shades such as black, white, and oak, as well as bespoke superior colours like blue, green, and red. Additionally, we provide colour matching services to ensure seamless integration with your home’s aesthetic.


How secure are Celestial’s composite doors?


Our composite doors are engineered with security as a top priority, featuring robust locking mechanisms and solid construction to deter intruders. With British Standards Specification approval and compliance with PAS 023 and PAS 024 standards, you can trust Celestial’s composite doors to keep your home safe and secure.


What maintenance is required for composite doors?


Composite doors are relatively low-maintenance compared to traditional timber doors. Regular cleaning with mild soap and water, along with periodic inspections of hinges and seals, is usually sufficient to keep your composite door looking and performing its best for years to come.


Can I install a composite door myself?


While DIY installation is possible for some homeowners, it’s recommended to have a professional install your composite door to ensure proper fitting and functionality. Our experienced installation team can handle the process efficiently, ensuring a perfect fit and optimal performance.


Does Celestial offer a warranty for composite doors?


Yes, all of our composite doors come with a comprehensive warranty, providing peace of mind and assurance of quality craftsmanship. Our warranty coverage varies depending on the specific product, so be sure to ask our team for details when making your purchase.


Are Celestial’s composite doors environmentally friendly?


Yes, our composite doors are designed with sustainability in mind, featuring eco-friendly materials and energy-efficient construction. With CFC-free polyurethane foam insulation and timber-free construction, Celestial’s composite doors offer an environmentally conscious choice for homeowners.


Can I customise the hardware for my composite door?


Absolutely! Celestial offers a wide range of hardware options for composite doors, including handles, letterboxes, and door knockers, available in various finishes such as chrome, gold, and brushed stainless steel. You can tailor your door’s hardware to match your personal style and preferences. This allows you to create your perfectly designed front door.




Celestial Windows is a trading name of Celestial Windows and Conservatories Limited

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