Business Details
38 Years
experience
Trusted Windows and Doors Supplier in Leeds
Alternative Windows was founded in 1988 and has grown to become one of the largest window and door manufacturers and suppliers in the North of England. Our expertise spans the design, manufacture, and installation of high-performance windows, doors, and conservatories, combining technical innovation with a commitment to quality. We specialise in UPVC, aluminium, and composite solutions, ensuring products meet rigorous security and thermal efficiency standards. Our team prioritises customer satisfaction, demonstrated through decades of experience, industry accreditations, and positive client testimonials. We maintain a culture of continuous improvement, aligning our quality objectives with customer needs and industry best practices.Our dedication to excellence is reflected in our partnerships with housing associations and residential clients, delivering tailored solutions for diverse projects. With a focus on innovation, we offer advanced features such as low thresholds, multi-point locking systems, and energy-efficient glazing. Our operations are guided by a clear vision of quality, security, and customer-centric service, ensuring long-term reliability and satisfaction. We invest in staff training and performance reviews to uphold our reputation as a trusted provider in the fenestration industry. This approach has solidified our position as a leader in the sector, serving both domestic and commercial clients across the region.
Services
Bi-Fold Doors
Composite Doors
Conservatories
Flush Sash Windows
Sliding Doors
UPVC Doors
UPVC Windows
Details
- Year established: 1988
Highlights and features
- We have over 35 years of experience in window and door manufacturing.
- Our products are accredited to Secured by Design and PAS 24 standards.
- We offer tailored solutions for residential and commercial properties.
- Our installations are completed by professional, customer-focused teams.
- We prioritise energy efficiency and thermal performance in all products.
Associations and certifications
- Secured by Design
- PAS 24
What people say
First class job
Very professional
Thrilled with installation
Excellent service
Efficient and thorough
Services
Bi-Fold Doors
Our bi-fold doors combine aluminium strength with PVCu thermal efficiency, offering secure, energy-efficient access. Available in 2-7 panes with low thresholds for family-friendly use. Patented ModLok technology ensures durability and anti-lift features for heavy-duty applications.
Composite Doors
GRP and composite doors provide modern security with traditional aesthetics. Police-approved locks and tested durability against extreme weather ensure safety. Customisable styles and colours match any property while maintaining high insulation standards.
Conservatories
Engineered conservatories offer year-round use with high-performance glass and bi-folding doors. Designs include Victorian, Georgian, and bespoke options, blending natural light with sturdy construction for contemporary or period homes.
Flush Sash Windows
Liniar flush sash windows mimic traditional timber frames without maintenance demands. A-rated energy efficiency and 1.3 U-value thermal performance ensure modern comfort. Available in multiple colours with secure, lead-free construction.
UPVC Windows
A-rated UPVC windows provide secure, draught-proof solutions with tilt-and-turn mechanisms for easy cleaning. Features include triple seals, reinforced hardware, and mock horn details for heritage aesthetics without compromising modern security.
Questions
What products do you offer?
We supply and install bi-fold doors, composite doors, conservatories, flush sash windows, UPVC windows, and sliding doors tailored to residential and commercial needs.
Are your products secure?
All products meet Secured by Design and PAS 24 standards, featuring anti-bump locks, multi-point locking systems, and reinforced hardware for maximum security.
Do you offer energy-efficient solutions?
Yes, our windows and doors achieve A-rated energy efficiency with U-values as low as 1.0 W/m², using triple glazing and thermal break technology.
Can I customise my order?
We offer custom colours, finishes, and configurations for doors and windows, ensuring seamless integration with your property's style.
What areas do you serve?
We operate across Leeds and the North of England, providing installations for both domestic and commercial properties.
How do I request a quote?
Contact us via our website form or phone number 0800 035 4180 to arrange a consultation and receive a tailored quote for your project.
