With over 30 years’ experience working alongside tradesmen and installers, we’ve built a reputation for supplying reliable, accredited products that help keep projects on track and within budget. While we continue to support homeowners, our trade service has become a trusted choice for professionals across the North West.
We offer a full trade supply of windows and doors—including secure, energy-efficient systems designed for easy installation and long-term performance. Every product we supply meets current building regulations and comes with a Certass insurance-backed guarantee.
Whether you’re a local installer, contractor, or developer, we deliver dependable supply, technical support, and practical solutions to help you achieve the right result on every job.
Profile 22 casement windows provide a perfect balance of energy efficiency, security, and customisation, making them a popular choice for Lancashire homes. These windows achieve impressive thermal performance, with double glazing reaching 1.2 W/m²K and a Window Energy Rating (WER) of A+, while triple glazing options go as low as 0.8 W/m²K with a WER of A++. The frame and sash feature up to eight thermal chambers with RCM Thermal Inserts, ensuring optimal insulation and structural stability.
Designed for durability and comfort, Profile 22 casement windows include optional centre seals on the frame and sash to improve insulation and weather protection. The secure bead system meets security standards without glazing clips, prepared for future PAS24 enhancements. For added durability, localised wall thickening enhances screw and hardware retention.
With the widest range of glazing options available, these windows allow for energy-efficient, tailored solutions. An extensive selection of cills, bay poles, accessories, and packers ensures every project can be completed to exact specifications, delivering both cost-efficiency and design flexibility.
Our aluminium bifold doors are engineered for reliability and flexibility, and are ideal for trade installers working on residential or light commercial projects. These doors combine slimline sightlines, high security, and excellent thermal performance—with U-values from 0.9 W/m²K available on triple-glazed specifications.
Multiple panel configurations (2 to 7) and a full RAL colour range allow for complete design flexibility across modern extensions, refurbishments, and new builds. Dual-colour and textured finishes are available to match external and internal schemes. Doors can open inwards or outwards, and low thresholds make them suitable for accessibility requirements.
With quick-fit hardware options, adjustable rollers, and robust frames designed for long-term durability, our aluminium bifolds are supplied ready for efficient on-site installation. Backed by a Certass insurance-backed guarantee, they meet current building regulations and provide a reliable, long-term solution for trade professionals across Lancashire and the North West.
In terms of trade supply products, we supply everything you will need for a hassle-free and smooth installation, all at a very competitive price for trade customers in Lancashire and the North West. From highly durable, sleek aluminium trade supply windows, to trade bifold doors that allow for an abundance of natural light, to contemporary, ultra-efficient composite doors, we supply trade products in any quantity on time, every time. So if you're looking for trade double glazing in Blackburn, Lancashire or the surrounding area, you can trust Great Harwood Window's trade supply service.
We offer an impartial consultancy service, and do not gravitate to any particular product or system – this results in a lot of flexibility to fit client requirements dependent upon budget and specification.
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Avantal Contemporary Doors
Comp Door Brochure
DoorStop
Great Harwood Windows
Heritage Windows Brochure
Imagine Flush Sash
Imagine Patio Doors
Korniche Bifold Doors
Korniche Home
Legacy Brochure
Love Liniar Brochure
Liniar Windows Brochure
Mustang Aluminium Front Doors Brochure
Opal Heritage Brochure
Origin Residential Door Brochure
Pilkington Decorative Glass
Profile 22 Windows and Doors Brochure
R2 brochure
R7 Brochure
R9 Brochure
Regalead Decorative Options
Rockdoor
SAS
SAS Curtain Wall Brochure
SAS Window Collection
Senior - Shopfront Brochure
Smart
Smart Sliding Folding Doors
Smart Glass
SolidCore
Solidor
Soho Collection
Spitfire Doors S-200 Brochure
Spitfire Doors S-500 Brochure
Spitfire Doors S-600 Brochure
Spitfire Doors-S 700 Pivot Doors
SV 2023
SV+ 2023
Swish
The Origin Internal Door
Ultraframe Brochure
Ultraframe Conservatories & Orangeries
Ultraframe Conservatory Brochure
Ultraframe LivinRoom Brochure
Ultraframe Replacement Roofs
Uni-Blinds
Uni-Blinds Blackouts
Visoglide
hup!_Trade Brochure_
GHW Bi-Folding Doors Profile Information Brochure
GHW - DoorStop Installation Guide
GHW - Composite Door Order Form
GHW - Generic Trade Order Form
GHW - Windows Order Form
GHW Thermal Rooflight Double-Glazed Technical-Information
GHW Thermal Rooflight Triple-Glazed Technical Information
GHW - Sundries Pricelist
GHW - Hinge Adjustment
Arched Window Aluminium
Black Aluminium Commercial Windows
internal aluminium pivot door
aluminium internal doors
aluminium internal door
aluminium internal doors
aluminium internal doors
aluminium internal doors
Spitfire Doors
Origin Front Door
Origin Black Aluminium Door Close Up
Door Fingerprint
Entrance Door
Natural effect Residential Door
Spitfire Door
Open aluminium bifold door
Open Bifold Door
Veka uPVC Bifold Door
Cantilever bifold 3x2
Warmcore Bifold Door Black
Bifold internal view 2
Warmcore Bifold Door Closed
Warmcore Bifold Door Exterior Open
Warmcore Bifold Door Exterior
Black aluminium bifold doors
french doors
White uPVC Patio-Door-1
Eurocell patio door grey
Deceuninck uPVC Patio Slider White Open
Light Grey Patio Door
White patio door under Gable
Patio aluminium sliding door
Deceuninck uPVC French Door
Veka uPVC French Door Close Up
An Origin internal door.
Green Stable Door
Oak effect Stable Door
Solidor Composite Stable Door Chartwell Green Open
Solidor Composite Stable Door Chartwell Green
A black front door.
Ludlow Composite Door
A black front door.
Red composite door
A black front door.
Blue Entrance Door
A black front door.
Solidor Composite Door Red Close Up
Leamore Contemporary Composite Door Anthracite Grey
White Solidor Composite Door
Solidor Composite Door Golden Oak
Green Composite Door
Solidor Composite Irish Oak Door
A black front door.
Chartwell green composite front door
grey composite door
chartwell green sliding sash window and composite door
black composite door
oak effect composite door
black composite door
golden oak composite door
timber effect composite door
green Composite door
Composite Door Chartwell Green
red composite door
Solidor Composite Stable Door Open White
Solidor Composite Stable Door Oak Open
Solidor Composite Door
white composite door and casement windows
Solidor Composite Door Anthracite Grey
green composite door installation
Solidor Composite Stable Door Chartwell Green Open
Grey reversible uPVC windows in a modern top-floor bedroom in Blackburn
Reversible uPVC windows installed in a modern high-rise commercial office interior
Liniar reversible uPVC windows fitted on contemporary three-storey townhouses in Blackburn
Close-up of white reversible uPVC window showing sash profile and handle for internal cleaning
white casement windows
grey casement windows
White Georgian Casement windows
Veka uPVC Casement White
VEKA full house casement window pvc great harwood
White casement windows
White casement windows with bars
White aluminium casement windows
Cream Casement Window
Veka uPVC Rosewood Casement and Bay Windows
Veka uPVC White Casement and Bow windows
Veka uPVC White Casement Installation
Eurocell uPVC Vertical Slider Cream
White Vertical Sliding Bay Window
Spectus Vertical Slider Kitchen
Spectus Vertical Slider Bedroom
Veka uPVC Vertical Sliders
Spectus Vertical Sliders Chartwell Green
Full house installation with flush sash windows
Deceuninck uPVC Flush Sash
White Flush Sash Window Installation
Oak effect flush sash window
Interior White Flush Sash Windows
uPVC Bow Windows
Veka uPVC Rosewood Casement and Bay Windows
Rosewood UPVC casement bay window
Golden oak bay window
Residence 9 Flush sash casement and bow window
Veka uPVC White Casement and Bow windows
Veka uPVC Small White Bow window
Chartwell green residence collection window close up
Residence 9 Flush sash casement and bow window
Oak effect residence collection window on brick wall
Residence Internal Shot
Residence Installation Fit
Heritage Aluminium Windows
White casement windows with bars
Veka uPVC Rosewood Bay Window
Chartwell green residence collection window close up
Vertical Sliding Sash Window
Evolve VS Chartwell Green sprayed external front of house
Ultraframe Conservatory Roof light
Ultraframe conservatory roof
Ultraframe glass roof conservatory
Tiled roof conservatory with glazed panels
Roof Lantern Glass
Black Roof Conservatory
Black lantern roof
Bedroom roof lantern
AluFold Direct Roof Lantern interior view
Glazed lantern roof
Ultrasky Lantern Roof Extensions
Ultraframe Bedroom Roof Lantern
Interior lantern roof
Situated in the very heart of Blackburn, we are readily capable of providing the people of East Lancashire and surrounding areas with a range of UPVC, composite and aluminium products. Whether for personal or trade purposes, realising your aspirations are only one step away with Great Harwood Windows team.
