11
Jul '25
New Knurled Handles Added to Our Premium Hardware Range
Read More
Composite Doors
High performance GRP composite doors are designed with 44mm thick, fully insulated door slabs for maximum thermal performance and security.
All our composite doors and composite back doors can be customised and tailored to suit any personal taste and property.
Our composite exterior doors are extremely low maintenance due to a durable Glass Reinforced Plastic skin (GRP) that prevents the door from warping, rotting or twisting. It also means your composite door will never require re-painting.
Our composite doors are available in many different styles, colours, hardware options and glass designs.
A CFC free polyurethane insulating core provides superior thermal performance as well as enhancing soundproofing.
Composite Doors
Our composite front doors have a 2mm bow tolerance compared to the standard 5mm. They use a high grade LVL, laminated veneer lumber which protects the frame from moisture making it less likely to warp, twist or bow.
A CFC free polyurethane insulating core provides superior thermal performance as well as enhancing soundproofing.
Our composite doors are available in many different styles, colours, hardware options and glass designs.
Thickened GRP Skins
Designed To Exceed Current Standards
Our composite doors feature fully reinforced 2mm thick GRP skins which have been regularly tested at BM Trade and are designed to exceed the current standards. They have been manufactured to not warp or bend in the heat.
Long Term Performance
High Density Polyurethane Core
Our composite doors have an internal construction of timber, LVL and composite material, combined with a high density polyurethane core. This makes them incredibly weather resistant so that they remain stable whatever the weather.
Highly Secure
Multi-point Locking
We use multi-point locking systems, with two hooks, rollers, deadbolt and one soft latch. What’s more, we also offer the option to upgrade to Secured by Design accreditation, with the addition of laminated glass, extra reinforcing and anti-snap/drill barrels
durable
Thickened GRP Skins
Designed To Exceed Current Standards
Our composite doors feature fully reinforced 2mm thick GRP skins which have been regularly tested at BM Trade and are designed to exceed the current standards. They have been manufactured to not warp or bend in the heat.
Long Term Performance
High Density Polyurethane Core
Our composite doors have an internal construction of timber, LVL and composite material, combined with a high density polyurethane core. This makes them incredibly weather resistant so that they remain stable whatever the weather.
High Security
Multi-point locking
We use multi-point locking systems, with two hooks, rollers, deadbolt and one soft latch. What’s more, we also offer the option to upgrade to Secured by Design accreditation, with the addition of laminated glass, extra reinforcing and anti-snap/drill barrels
- Multi-point locking with two hooks, rollers, deadbolt and one soft latch
- 24mm Kitemarked toughened sealed units manufactured to EN1279
durable
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
Augusta Centre Farmhouse
Vilamoura Flush
Turnberry
Valderrama Centre Farmhouse
Troon
Sunningdale Farmhouse
Sunningdale Flush
St Andrews
Seminole 3 Centre Flush
Santon Farmhouse
Portrush
Riviera
Pevero Square Flush
Oakmont
Penina
Muirfield
Monza 2 Solid
Merion Farmhouse
Medinah
Lytham
Lytham Flush
Lytham Farmhouse
Links Villamoura
Links Urban Augusta
Links Valderamma
Links Sunningdale
Links Seminole 4
Links Seminole 5
Links Seminole 3
Links Oakmont
Links Inox Paris
Links Inox Nice
Links Inox Munich
Links Inox Monaco
Links Inox Lyon
Links Inox Biarritz
Links Inox Barcelona
Links Flush
Links Copenhagen
Links Augusta
Links Augusta Centre
Links Augusta Centre 1
Inox Paris
Inox Nice
Inox Nice
Inox Munich
Inox Monaco
Inox Lyon
Inox Lyon
Inox Biarritz
Inox Barcelona
Inox Barcelona Left With Curve Flush
Gleneagles
Gleneagles Solid
Flush
Farmhouse
Farmhouse Oakmont
Copenhagen
Contemporary Vilamoura
Contemporary Gleneagles
Contemporary Seminole
Contemporary Birkdale
Contemporary Chantillycottage
Contemporary Augustalong
Contemporary Belfrycottage
Contemporary Augusta
Colonial
Chantilly Flush
Chantilly Farmhouse
Chantilly Farmhouse Sunburst
Carnoustie
Carnoustie Cottage Flush
Carnoustie Cottage Farmhouse
Birkdale
Belfry Flush
Belfry Farmhouse
Belfry 3 Flush
Augusta Centre Flush
Belfry 3 Farmhouse
Style Your Home with Our Range of Doors
Explore our range of bespoke composite door styles, colours and glazing to create your dream front door. We provide contemporary and traditional designs to suit all property types.
Agate Grey
Wedgewood
White
Very Berry
Victory Blue
Vanilla
Stormy Seas
Slate
Silver Grey
Red
Shadow
Olive Grove
Mulberry
Nimbus
Military Grey
Moonshine
Green
Marsala
Florida
French Blue
Emerald
Diablo
Cotswold
Cream White
Clotted Cream
Clay
Citrine
California
Chartwell
Bolero
Blue
Azure
Black
Anthracite
Unlimited Colours
Our composite door range is available in virtually any colour. This includes our standard range of White, Red, Green, Blue and Black to bespoke laminated foils and a premium range of RAL coloured doors.
Zinc Art Star
Yukon
Venetian Blind LH
Venetian Blind RH
Trio Diamond
Thorncliffe Red
Thorncliffe Blue
Thorncliffe Clear
Thorncliffe Green
Tahoe Purple
Tahoe Red
Tahoe Green
Tahoe Blue
Tahoe Black
Tacoma
Simplicity Zinc
Satin Tough Low E
Simplicity Brass
Reflections
Richmond
Roma
Prairie
Quartz
New Orleans
Obs Tough Low E
Murano Red
Murano Purple
Murano Green
Murano Blue
Murano Black
Montreal
Modena
Millennium
Matrix
Milan
Masterline
Linear
Kensington
Havana
Greenwich
Horizon
French Clear
Georgian Bar White
Georgian Bar Anth Grey
Georgian Bar Black
Fleur
Finesse
Flair
Etch Squares
Elegance Zinc
Eiger
Dorchester
Diamonds Purple
Diamonds Red
Diamonds Grey
Diamonds Green
Diamonds Blue
Diamonds Clear
Designer Etch Grey
Designer Etch Clear
Deco
Clear Tough Low E
Crystal Flowers
Chelsea
Classic
Beaumont
Bullseye
Cascata
Aurora
Bespoke Glazing
We offer a wide range of stained glass and bevelled glass designs to ensure that our composite doors offer a striking, impressive aesthetic. Our comprehensive range of styles allows anybody to find the perfect choice for their property, with ease.
Download Your Brochures
DOWNLOAD BROCHURESDownload our composite front doors brochure to check out our full range of windows and doors. They’re packed with plenty of additional information, including technical information, detailed colour swatches and photos.
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
Augusta Centre Farmhouse
Vilamoura Flush
Turnberry
Valderrama Centre Farmhouse
Troon
Sunningdale Farmhouse
Sunningdale Flush
St Andrews
Seminole 3 Centre Flush
Santon Farmhouse
Portrush
Riviera
Pevero Square Flush
Oakmont
Penina
Muirfield
Monza 2 Solid
Merion Farmhouse
Medinah
Lytham
Lytham Flush
Lytham Farmhouse
Links Villamoura
Links Urban Augusta
Links Valderamma
Links Sunningdale
Links Seminole 4
Links Seminole 5
Links Seminole 3
Links Oakmont
Links Inox Paris
Links Inox Nice
Links Inox Munich
Links Inox Monaco
Links Inox Lyon
Links Inox Biarritz
Links Inox Barcelona
Links Flush
Links Copenhagen
Links Augusta
Links Augusta Centre
Links Augusta Centre 1
Inox Paris
Inox Nice
Inox Nice
Inox Munich
Inox Monaco
Inox Lyon
Inox Lyon
Inox Biarritz
Inox Barcelona
Inox Barcelona Left With Curve Flush
Gleneagles
Gleneagles Solid
Flush
Farmhouse
Farmhouse Oakmont
Copenhagen
Contemporary Vilamoura
Contemporary Gleneagles
Contemporary Seminole
Contemporary Birkdale
Contemporary Chantillycottage
Contemporary Augustalong
Contemporary Belfrycottage
Contemporary Augusta
Colonial
Chantilly Flush
Chantilly Farmhouse
Chantilly Farmhouse Sunburst
Carnoustie
Carnoustie Cottage Flush
Carnoustie Cottage Farmhouse
Birkdale
Belfry Flush
Belfry Farmhouse
Belfry 3 Flush
Augusta Centre Flush
Belfry 3 Farmhouse
Style Your Project with Our Range of Doors
Explore our range of bespoke composite door styles, colours and glazing to offer your customers an exciting range of choices. We provide contemporary and traditional designs to suit all property types.
Agate Grey
Wedgewood
White
Very Berry
Victory Blue
Vanilla
Stormy Seas
Slate
Silver Grey
Red
Shadow
Olive Grove
Mulberry
Nimbus
Military Grey
Moonshine
Green
Marsala
Florida
French Blue
Emerald
Diablo
Cotswold
Cream White
Clotted Cream
Clay
Citrine
California
Chartwell
Bolero
Blue
Azure
Black
Anthracite
Unlimited Colours
Our composite door range is available in virtually any colour. This includes our standard range of White, Red, Green, Blue and Black to bespoke laminated foils and a premium range of RAL coloured doors.
Zinc Art Star
Yukon
Venetian Blind LH
Venetian Blind RH
Trio Diamond
Thorncliffe Red
Thorncliffe Blue
Thorncliffe Clear
Thorncliffe Green
Tahoe Purple
Tahoe Red
Tahoe Green
Tahoe Blue
Tahoe Black
Tacoma
Simplicity Zinc
Satin Tough Low E
Simplicity Brass
Reflections
Richmond
Roma
Prairie
Quartz
New Orleans
Obs Tough Low E
Murano Red
Murano Purple
Murano Green
Murano Blue
Murano Black
Montreal
Modena
Millennium
Matrix
Milan
Masterline
Linear
Kensington
Havana
Greenwich
Horizon
French Clear
Georgian Bar White
Georgian Bar Anth Grey
Georgian Bar Black
Fleur
Finesse
Flair
Etch Squares
Elegance Zinc
Eiger
Dorchester
Diamonds Purple
Diamonds Red
Diamonds Grey
Diamonds Green
Diamonds Blue
Diamonds Clear
Designer Etch Grey
Designer Etch Clear
Deco
Clear Tough Low E
Crystal Flowers
Chelsea
Classic
Beaumont
Bullseye
Cascata
Aurora
Bespoke Glazing
We offer a wide range of stained glass and bevelled glass designs to ensure that our composite doors offer a striking, impressive aesthetic. Our comprehensive range of styles allows anybody to find the perfect choice for their property, with ease.
Download Your Brochures
DOWNLOAD BROCHURESWe offer beautifully designed marketing literature showcasing our composite door styles and options to help your customers find their dream entrance door more easily.
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
Extensive Choice of High Quality Hardware
These flush doors come with a choice of Lever/Lever and Lever/Pad inline, SBP and fab and fix handles. These can be colour customised to suit the style of the property. Choose anything from standard white to striking gold with our quality hardware range.
Extensive Choice of High Quality Hardware
These flush doors come with a choice of Lever/Lever and Lever/Pad inline, SBP and fab and fix handles. These can be colour customised to suit the style of the property. Choose anything from standard white to striking gold with our quality hardware range.
Click through our showroom to explore our products in greater detail
Explore Our Virtual Showroom
Click through our showroom to explore our products in greater detail
Explore Our Virtual Showroom
Stylish Composite Doors
As the entrance to your home, your front door says a lot about you so why compromise on looks? Our high-definition composite doors feature advanced GRP skins which give you a real timber appearance, with mouldings which give the feel of a traditional wooden door.
Our elegant designs are combined with a highly robust structure, creating a remarkably strong and durable door. Now you can benefit from a traditional style without compromising on energy efficiency or security.
Stylish Composite Doors
As composite door manufacturers, we know how to build powerful and long lasting doors. Our composite doors are manufactured using the latest uPVC technology with advanced locking systems which offer exceptional security and durability.
State-Of-The-Art-Machinery
Inspired by traditional timber joinery, The Deceuninck uPVC flush sash window can be either fully welded or mechanically jointed for a more authentic appearance. This allows them to offer a traditional charm to new builds or an enhancing feature to traditional or conservation properties.
Partner with us for access to our state-of-the-art technology. At Sternfenster, we supply unique products at competitive trade prices.
Frequently Asked Questions
Do you offer any other types of composite doors?
View our new range of GRiPCORE doors that offer a new level of performance.
Who is Sternfenster?
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, we continue to deliver high-quality products nationally but with the values of a family-run business.
We are proud to have 50 years of manufacturing at Sternfenster and are fully committed to UK homeowners and offering sustainable products and services wherever possible. Working closely within the trade and retail industry, we offer nationwide delivery across our comprehensive portfolio.
How fast are your lead times?
We offer exceptionally fast lead times as low as five days, without compromising on quality.
Does Sternfenster offer any warranties for their products?
We offer competitive warranties, lead times as fast as five days and outstanding aftercare.
Frequently Asked Questions
Do you offer any other types of composite doors?
View our new range of GRiPCORE doors that offer a new level of performance.
Who is Sternfenster?
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, we continue to deliver high-quality products nationally but with the values of a family-run business.
We are proud to have 50 years of manufacturing at Sternfenster and are fully committed to UK homeowners and offering sustainable products and services wherever possible. Working closely within the trade and retail industry, we offer nationwide delivery across our comprehensive portfolio.
How fast are your lead times?
We offer exceptionally fast lead times as low as five days, without compromising on quality.
Does Sternfenster offer any warranties for their products?
We offer competitive warranties, lead times as fast as five days and outstanding aftercare.
Latest from Sternfenster
VIEW ALL NEWS
11
Jul '25
New Knurled Handles Added to Our Premium Hardware Range
Read More
30
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Aluminium Patio Doors vs Aluminium Bifold Doors: The Key Benefits & Differences
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27
Jun '25
Sternfenster Records 99.5% Transport COTIF
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24
Jun '25
The Future of Construction – Smart Windows & Doors for Trade
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