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Years Experience
welcome to IDL Windows LTD
Premium uPVC & Aluminium Windows and Doors – Supply & Fit in Lancashire
At IDL Windows LTD., we specialise in FENSA-certified installation of windows and doors across Lancashire. Working with Cortizo, Sheerline, and Sunflex UK, we deliver stylish, secure, and energy-efficient solutions built to last.
Window Services
Upgrade your home with uPVC and aluminium windows engineered for energy efficiency, security, and sleek design.
Window Installation
Our FENSA-approved installers ensure flawless fitting, with double and triple-glazing options tailored to your property.
Door Services
Choose from bi-fold, sliding, composite, and entrance doors – all crafted for style, durability, and security.
Door Installation
We provide PAS 24 and Secured by Design-compliant fittings, giving you total peace of mind.
Trusted Choice
Why Choose IDL Windows LTD.?
At IDL Windows LTD., we bring 25+ years of expertise in delivering premium uPVC and aluminium windows and doors across Lancashire. Trusted by homeowners, architects, and developers, we combine top brands like Cortizo, Sheerline, and Sunflex UK with FENSA-certified installation to ensure every project is both beautiful and built to last. Our focus on energy efficiency, enhanced security, and bespoke design means you not only improve your property’s appearance but also increase its comfort, value, and long-term performance — giving you complete peace of mind.
Premium Quality Craftsmanship
Durable, weather-resistant designs built with Cortizo, Sheerline, and Sunflex UK systems.
Bespoke Design Solutions
From bi-folds to casement windows, we tailor every project to your style and performance needs.
Exceptional Customer Service
FENSA-approved installers with full warranties and dedicated local support across Lancashire.
projects
Our latest projects
Aluminum Doors
Office Door
Lobby Window
Main Door
our process
Your next steps
At IDL Windows, we follow a customer-focused, step-by-step approach to ensure every project is handled with precision and care. From the initial consultation to the final installation, our process is designed to deliver flawless results that exceed your expectations.
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Browse Products
Discover the perfect blend of elegance and durability with IDL Windows.
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Request a quote
Get your free of cost quote today!
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Get expert installation
Precision. Quality. Guaranteed.
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Enjoy
testimonial
What our customer say
“IDL Windows transformed our home in Preston with their stunning uPVC windows. The quality and service were exceptional. Highly recommended!”
Emma and John H., Preston
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Professional Team
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Satisfied Customer
Ready to Transform Your Space?
Frequently Asked Questions (FAQs)
How quickly can IDL Windows respond to emergency glass replacement in Blackburn?
IDL Windows offers a 24/7 emergency glass replacement service in Brierfield. Our team is fully equipped and can typically arrive within 90 minutes of your call*, ensuring fast, efficient, and professional assistance when you need it most.
What types of windows and doors do you offer?
IDL Windows specializes in a wide range of uPVC products, including sliding doors, casement windows, and tilt-and-turn systems. Whatever your needs, IDL Windows delivers modern, reliable, and stylish solutions.
Can I customize the design and size?
At IDL Windows, every product is customizable — from dimensions and opening styles to colors and finishes. IDL Windows ensures your windows and doors fit perfectly with your home’s aesthetic and functional needs.
Are your products energy efficient?
Yes, all products by IDL Windows are designed with energy efficiency in mind. Using multi-chambered uPVC profiles and high-performance glazing, IDL Windows helps reduce your energy bills while maintaining year-round comfort.
Do you provide installation services?
Yes, IDL Windows offers full-service installation carried out by our experienced professionals. From delivery to fitting, IDL Windows ensures everything is done precisely for long-lasting performance.
What brands and materials does IDL Windows use in its manufacturing process?
At IDL Windows, we use top-quality materials from trusted brands like Cortizo, Sheerline, and Sunflex UK. These partnerships allow IDL Windows to deliver windows and doors known for performance, durability, and sleek design.
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Our Core Services
Supplying & Fitting Windows
The UK’s trusted and leading window supplier and installer, IDL Windows LTD, provides both aluminium and uPVC window solutions across Lancashire, with styles to suit every home. Our range includes Casement Windows, Sash Windows, Bay Windows, Tilt and Turn Windows, and Heritage Windows — giving homeowners access to the UK’s largest selection of high-quality windows at the lowest prices.
Equally important is the fitting process. Proper window installation ensures energy efficiency, weatherproofing, and security, protecting your home from draughts, water ingress, and heat loss. IDL Windows LTD. specialises in professional, FENSA-certified fitting across Lancashire, giving homeowners confidence that their new windows not only look stunning but also perform at the highest standard for years to come.
Supplying & Fitting Doors
IDL Windows LTD. is the UK’s trusted and leading door supplier and installer, offering both aluminium and uPVC door systems tailored to every architectural style. Our range includes B-Fold Doors, uPVC Doors, French Doors and Sliding Doors — providing homeowners with the UK’s largest selection of high-quality doors at unbeatable prices.
High performance starts with precision. Expert door installation ensures energy efficiency, advanced security, and seamless operation, safeguarding your home against draughts, water ingress, and heat loss. IDL Windows LTD. delivers this through FENSA-certified fitting across Lancashire, backed by multi-point locking systems, a 10-year profile guarantee, a 5-year glazed unit warranty, 1-year hardware protection, fast lead times, and our price-beat commitment — giving every customer complete peace of mind.
Why Choose IDL Windows LTD.?
Premium Craftsmanship
IDL Windows LTD. stands for premium craftsmanship, combining superior materials, precision installation, and lasting durability. From aluminium and uPVC systems sourced from trusted brands like Cortizo, Sheerline, and Sunflex, to FENSA-certified fittings across Lancashire, every project reflects uncompromising quality. Our focus on design detail, structural strength, and performance guarantees ensures windows and doors that not only look elegant but also deliver energy efficiency, security, and long-term value for your home.
FENSA Certified Installers
FENSA certification confirms windows and doors meet building regulations. Customers receive a certificate as proof of compliance. IDL Windows LTD. is a FENSA-registered installer in Lancashire, guaranteeing approved work.
Aftercare Service
Our relationship doesn’t end once your installation is complete. At IDL Windows LTD., we provide ongoing support across Lancashire, including maintenance advice, adjustments, and long-term care to keep your doors and windows in peak condition. Every customer also benefits from our fast lead times and responsive aftercare team, ensuring your investment continues to deliver comfort and security well into the future.
Product Warranty
We proudly install trusted systems from Cortizo, Sheerline, and Sunflex, all supplied with 10-year profile guarantees and 5-year sealed unit coverage, plus 1-year hardware and lock protection. This means every window and door is backed not only by premium design but also by robust warranties for lasting confidence. Our “price-beat” commitment ensures you always receive the best possible value without compromising on quality.
Installation Warranty
Every fitting carried out by our expert team is covered by a full installation warranty, guaranteeing workmanship you can rely on. Whether it’s precision sealing, alignment, or weatherproofing, your installation is protected for the long term. With free local delivery across Lancashire (and nationwide delivery available on larger orders), combined with quick turnaround times of 5–15 working days, IDL Windows LTD. provides reliability, speed, and trust that homeowners expect from a leading supplier.
Our Product Range
Aluminium Windows
Aluminium windows are strong, slim-framed, and ideal for modern designs. They allow maximum natural light while offering durability and low maintenance. IDL Windows supplies and installs premium aluminium windows across Lancashire, giving homeowners the option to buy stylish, energy-efficient frames at the best prices. Explore our stunning range of aluminium windows and order today with professional fitting included.
uPVC Windows
uPVC windows are durable, low-maintenance, and weather-resistant, making them perfect for the UK climate. They improve insulation while offering long-term performance. IDL Windows supplies and installs high-quality uPVC windows in Lancashire, offering customers modern or traditional designs at affordable prices. Browse our uPVC collection and upgrade your home with trusted, energy-efficient windows.
Casement Windows
Casement windows are versatile, side-hinged designs that provide excellent ventilation. At IDL Windows, homeowners can buy and order casement windows at competitive prices, supplied and fitted across Lancashire in both aluminium and uPVC styles. Find your perfect casement design today with professional installation and warranty protection.
Tilt & Turn Windows
Tilt and turn windows open in two ways: tilting for ventilation or turning for full access. They are versatile, secure, and easy to clean. IDL Windows supplies and installs tilt and turn systems from Cortizo and Sheerline, giving Lancashire homeowners the chance to buy premium windows at the best prices. Discover modern tilt & turn solutions and enjoy effortless style with expert fitting.
Sash Windows
Sash windows bring timeless elegance while incorporating modern glazing technology. IDL Windows supplies and fits sash windows across Lancashire, offering homeowners the chance to buy traditional or heritage styles at affordable prices. Shop our sash collection today and add classic charm with modern efficiency.
Bay Windows
Bay windows create additional space, panoramic views, and enhanced natural light. IDL Windows supplies and installs bespoke bay windows in Lancashire, making it easy to buy custom designs at the best price with guaranteed performance. Explore our bay window options and transform your living space today.
Heritage Windows
Heritage windows are designed for period properties, blending traditional style with modern performance. IDL Windows offers heritage windows for sale across Lancashire, supplying and installing high-quality frames at competitive prices. Choose heritage windows today to restore your home’s character with lasting value.
Entrance Doors
Entrance doors provide security and curb appeal. They are the focal point of a property and influence first impressions. IDL Windows LTD. supplies and installs high-quality entrance doors in uPVC, aluminium, and composite materials across Lancashire.
French Doors
French doors are classic double doors that open inward or outward. They combine timeless style with modern functionality. IDL Windows LTD. supplies and installs French doors in aluminium and uPVC across Lancashire.
Bi-Fold Doors
Bi-fold doors feature multiple panels that fold to one side, opening up entire walls. They are perfect for connecting indoor and outdoor living. IDL Windows LTD. supplies and installs bi-fold systems from Cortizo and Sunflex across Lancashire.
Sliding Doors
Sliding doors move smoothly along tracks to save space and maximise views. They provide easy garden access and natural light. IDL Windows LTD. supplies and installs premium sliding door systems from Sunflex in Lancashire homes.
Pivot Doors
Pivot doors create seamless transitions between living spaces and gardens. Available in sliding or French styles, they enhance modern living. IDL Windows LTD. supplies and installs Pivot door solutions from Cortizo and Sunflex across Lancashire.
Specialist Glazing & Extensions
Conservatories
Conservatories extend living space with natural light. Quality glazing makes them comfortable all year round. IDL Windows LTD. supplies and fits conservatories across Lancashire with advanced double and triple-glazing.
Roof Lanterns
Roof lanterns add light and style to extensions and flat roofs. They enhance both aesthetics and energy efficiency. IDL Windows LTD. installs roof lanterns across Lancashire from trusted brands like Korniche.
Shopfront Glazing
Shopfront glazing creates modern, open retail entrances with high visibility. It strengthens branding and attracts customers. IDL Windows LTD. installs shopfront glazing across Lancashire for businesses of all sizes.
Trusted Brands We Supply
Cortizo
Cortizo is a leading European aluminium system manufacturer. Their sleek designs are durable, secure, and energy-efficient. IDL Windows LTD. supplies and installs Cortizo systems across Lancashire.
Sheerline
Sheerline is a UK aluminium brand known for advanced thermal performance. Their systems combine strength with modern style. IDL Windows LTD. installs Sheerline products across Lancashire for stylish, sustainable results.
Sunflex UK
Sunflex specializes in premium sliding and bi-fold door systems. Their products bring modern living and seamless garden access. IDL Windows LTD. supplies and installs Sunflex systems across Lancashire.
Compliance & Certification You Can Trust
FENSA Certified Installations
FENSA certification confirms windows and doors meet building regulations. Customers receive a certificate as proof of compliance. IDL Windows LTD. is a FENSA-registered installer in Lancashire, guaranteeing approved work.
UK Building Regulations Compliance
Windows and doors must meet UK standards for safety, ventilation, and energy efficiency. Compliance ensures durability and performance. IDL Windows LTD. installs products fully compliant with UK Building Regulations across Lancashire.
Passive House-Ready Solutions
Passive House is an energy-efficient building standard that reduces heating and cooling needs. triple-glazing and insulated frames are key to meeting it. IDL Windows LTD. installs Passive House-ready systems across Lancashire.
Our Customer Process
Home Survey
A home survey ensures accurate measurements and tailored recommendations before installation. This step guarantees a perfect fit and precise quotation. IDL Windows LTD. provides free home surveys across Lancashire for both windows and doors.
Free Quotation
A quotation is a clear, no-obligation cost estimate provided before work begins. It outlines the products, services, and pricing in detail. IDL Windows LTD. offers transparent quotations across Lancashire so customers always know exactly what to expect.
Professional Installation
An installation warranty guarantees the quality and durability of fitting work. It protects homeowners from issues related to poor alignment, sealing, or compliance. IDL Windows LTD. provides full installation warranties across Lancashire for total reassurance.
Warranty & Aftercare
Aftercare ensures continued support long after installation is complete. This includes advice, maintenance tips, and adjustments if needed. IDL Windows LTD. provides dedicated aftercare across Lancashire, giving customers lasting peace of mind.
Serving Homes and Businesses Across Lancashire
Lancashire
IDL Windows LTD. proudly serves Lancashire with premium windows and doors. From Preston to Blackburn and Blackpool, we deliver trusted installation services. Homeowners benefit from stylish, energy-efficient solutions.