📍 Southampton, Hampshire

Premium UPVC Windows & Doors for Southampton Homes

Transform your property with high-quality linear windows, composite doors, conservatories, and Supalite replacement roofs. Expert installation, competitive prices.

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20+ Years Experience

Trusted in Southampton

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10 Year Guarantee

Complete peace of mind

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Competitive Pricing

Best value guarantee

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Expert Installation

Professional fitters

What Our Customers Say

Read reviews from satisfied homeowners across Southampton and Hampshire

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James Mitchell
2 weeks ago
Excellent service from quote to installation. Our new windows have made such a difference to our home. The team were professional and left everything spotless. Highly recommend Prism Windows.
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Sarah Thompson
1 month ago
Very happy with our new composite door. Installation took a bit longer than expected but the end result is fantastic. Great quality product and competitive pricing.
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Mark Davis
3 months ago
Had a conservatory roof replacement done. What a transformation! No more unbearable heat in summer. The whole process was smooth and the team were brilliant.
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Lisa Roberts
5 months ago
Fantastic experience from start to finish. The quote was detailed and fair, installation was quick and tidy. Our new bay window is beautiful. Would definitely use again.
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Paul Anderson
6 months ago
Good quality windows at a reasonable price. Communication could have been better regarding delivery dates, but overall pleased with the final result and workmanship.
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Emma Clarke
8 months ago
Absolutely delighted with our new front door. The quality is outstanding and it looks stunning. The fitters were courteous and respectful of our home. Couldn't ask for more!
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David Wilson
10 months ago
Replaced all windows in our 1930s semi. Prism Windows maintained the character while improving efficiency dramatically. Heating bills down by 30%. Excellent job all round.
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Catherine Brown
1 year ago
Pleased with the conservatory we had built. Took a little longer than originally quoted but the quality is good and we're enjoying the extra space. Price was competitive.
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Tom Harris
1 year ago
Top quality service throughout. From the initial survey to final fitting, everything was handled professionally. Windows are superb quality. Worth every penny. Highly recommended!
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Rachel Green
1 year ago
Had bifold doors fitted to our kitchen extension. Absolutely love them! They've opened up the whole space. Installation team were brilliant - tidy and efficient. Great company to work with.

Manufacturing & Trade Excellence

Prism Windows is your trusted manufacturing partner for premium UPVC products. We combine rapid turnaround times with uncompromising quality to support your business growth.

5-7
Day Turnaround
100%
Quality Checked
20+
Years Experience
24/7
Support Available

Your Reliable Manufacturing Partner

Rapid Manufacturing

Time is money in your business. Our streamlined manufacturing process delivers premium UPVC products in just 5-7 working days from order confirmation.

  • Standard orders: 5-7 working days
  • Express service available for urgent projects
  • Real-time order tracking and updates

🏆 Uncompromising Quality

Quality isn't just a promise—it's guaranteed. Every single product undergoes rigorous quality control inspections.

  • Multi-point quality inspection at every stage
  • Premium Liniar profiles - market-leading performance
  • 10-year manufacturer guarantee on all products

Start Your Trade Partnership Today

Fill out the form below and our trade team will contact you within 24 hours.

We typically respond within 2-4 hours during business hours

🤝 Always Here to Help

We're not just manufacturers—we're your partners in success. Whether you need technical advice at 7am or help with a complex specification, our team is ready to assist.

  • Dedicated trade support team available 7 days a week
  • Fast-track quotes typically returned within 2 hours
  • Technical specification assistance and advice
  • Emergency same-day service for urgent requirements

💼 Trade Account Benefits

✓ Competitive trade pricing structure

✓ Volume discounts for larger orders

✓ Flexible payment terms available

✓ Credit accounts for established businesses

✓ Priority manufacturing slots

✓ Free technical training and support

✓ Marketing materials and support

✓ Access to full product range and custom options

Join hundreds of installers and contractors who trust Prism Windows for quality products and reliable service.

About Prism Windows

Based in Southampton, Prism Windows has been serving Hampshire homeowners for over 20 years with premium UPVC products and expert installation services.

We specialize in providing high-quality linear windows, composite doors, conservatories, and innovative Supalite replacement roofs. Our commitment to excellence, combined with competitive pricing and outstanding customer service, has made us one of the most trusted names in the region.

All our products come with comprehensive guarantees, and our experienced installation team ensures every project is completed to the highest standards.

Service Areas

We proudly serve Southampton and the surrounding Hampshire areas including Eastleigh, Romsey, Totton, Winchester, and beyond.

Get Your Free Quote Today

Contact us for a no-obligation quote on any of our products. Our team will be happy to discuss your requirements.

Linear Windows

Modern, energy-efficient windows with clean, contemporary lines

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Premium Liniar UPVC Windows

Our Liniar windows represent the latest in UPVC window technology, offering slim sightlines and contemporary aesthetics that suit both modern and traditional properties throughout Southampton and Hampshire.

Manufactured to the highest standards using Liniar's innovative multi-chambered profile system, these windows provide exceptional thermal efficiency, helping to reduce your energy bills while keeping your home comfortable year-round.

Key Features & Benefits

  • Ultra-slim sightlines for maximum glass area and natural light - up to 30% more glass than traditional frames
  • Excellent thermal efficiency with A+ energy ratings as standard - reduce heating costs by up to 20%
  • Multi-point locking systems with Yale locks for enhanced security - Secured by Design approved
  • Low maintenance UPVC that won't warp, rot, fade or require painting
  • Wide range of colors including white, cream, grey, black, and authentic woodgrain foil finishes
  • Multiple opening styles: tilt and turn, casement, sash, and bay windows available
  • Internally beaded for additional security and easy glass replacement
  • 100% lead-free and fully recyclable materials for environmental sustainability
  • 10-year manufacturer's guarantee covering all materials and workmanship
  • Professional measurement, installation, and building regulations compliance included

Window Styles Available

Casement Windows: The most popular style, opening outwards for easy cleaning and excellent ventilation.

Tilt & Turn Windows: Modern European-style windows offering two opening positions for versatility and safety.

Sliding Sash Windows: Traditional elegance with modern performance, perfect for period properties.

Bay & Bow Windows: Create stunning features while adding space and light to any room.

Energy Efficiency

All our Liniar windows achieve Window Energy Ratings (WER) of A+ as standard. The innovative multi-chambered design traps warm air, while advanced weather seals prevent drafts. With double or triple glazing options, you can significantly reduce your home's carbon footprint and energy bills.

Perfect for: New builds, extensions, replacements, and renovations throughout Southampton, Eastleigh, Romsey, Winchester and all Hampshire areas. Suitable for both residential and commercial properties.

Get Your Free Windows Quote

Liniar Window Styles Guide

Choose from our comprehensive range of window styles, each designed to suit different architectural requirements and personal preferences.

Casement Windows

Most Popular Choice

  • Side-hung windows that open outwards
  • Easy to clean from inside
  • Excellent ventilation control
  • Multi-point locking for security
  • Available in single or multiple panels

Perfect for: Living rooms, bedrooms, kitchens - virtually any room in your home.

Tilt & Turn Windows

Modern European Design

  • Two opening positions in one window
  • Tilt inward for secure ventilation
  • Turn to open fully like a door
  • Child-safe tilt position
  • Easy cleaning - both sides from inside

Perfect for: High-rise flats, bedrooms, offices - ideal where external access is difficult.

Sliding Sash Windows

Traditional Elegance

  • Classic Victorian & Georgian style
  • Vertical sliding operation
  • Modern UPVC with period aesthetics
  • Spring-balanced mechanism
  • Authentic detailing & finishes

Perfect for: Period properties, conservation areas, listed buildings requiring authentic styling.

Bay & Bow Windows

Stunning Features

  • Extends outward from property
  • Creates extra internal space
  • Floods room with natural light
  • Adds significant property value

Perfect for: Living rooms, master bedrooms - creates an impressive architectural feature.

French Casement Windows

Unobstructed Views

  • No central mullion when open
  • Both sashes open outward
  • Maximum opening for access
  • Elegant, symmetrical appearance

Perfect for: Garden rooms, orangeries, areas requiring wide unobstructed opening.

Reversible Windows

Easy Maintenance

  • Window rotates 180 degrees
  • Clean exterior from inside
  • Ideal for upper floors
  • Safety mechanism prevents accidents

Perfect for: High-rise properties, difficult access locations, loft conversions.

Not Sure Which Style?

Our expert surveyors will visit your Southampton property and recommend the best window styles for your home's architecture, your requirements, and your budget. We'll show you samples and help you make the perfect choice.

Book Free Consultation

Composite Doors

Stunning front doors combining style, security, and durability

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Premium Soliddoor Composite Doors

Make a lasting first impression with our stunning range of Soliddoor composite doors. Combining the authentic look of timber with the performance and low maintenance of modern materials, these doors offer the perfect entrance solution for Southampton homes.

Our composite doors are built with a solid timber core, high-density foam insulation, and a durable GRP (Glass Reinforced Plastic) skin that won't warp, crack, or fade over time. Available in hundreds of design combinations.

Key Features & Benefits

  • Exceptional security with 3-star Kitemarked cylinder locks and multi-point locking as standard - police approved Secured by Design
  • Outstanding thermal insulation with U-values as low as 0.8 W/m²K - keeping your home warmer and reducing energy bills
  • Extensive choice of designs from traditional cottage styles to ultra-modern contemporary doors
  • Solid 48mm timber core for superior strength, stability and sound insulation
  • Realistic woodgrain textures and smooth finishes in over 20 colors including anthracite grey, black, red, blue, green, and classic white
  • Weather-resistant GRP skin with UV-stable color that won't fade, crack, peel or require painting
  • Wide range of decorative glazing options including obscure, patterned, and beveled glass
  • Matching side panels and top lights available to create stunning entrances
  • High-quality stainless steel hardware and accessories in chrome, gold, black and white finishes
  • 10-year comprehensive guarantee covering materials, finish, and hardware

Design Collections

Traditional Range: Classic designs perfect for period properties, featuring elegant paneling and authentic cottage-style aesthetics.

Contemporary Range: Clean, modern designs with minimalist glazing and sleek lines ideal for new builds and modern homes.

Cottage Range: Rustic charm with stable door options, traditional hardware, and country-style appeal.

Glazed Range: Maximum light with stunning decorative glass options from simple bevels to intricate patterns.

Security & Safety

Your family's safety is our priority. All our composite doors exceed PAS 24:2016 security standards and are Police approved under Secured by Design. Multi-point locking systems engage at five points around the door frame, while anti-drill, anti-pick, and anti-snap cylinder locks provide maximum protection against forced entry.

Energy Efficiency

The solid timber core combined with high-density foam insulation creates exceptional thermal performance. Energy-efficient composite doors can save you hundreds of pounds per year on heating bills while creating a draught-free, comfortable home.

Available for: Front doors, back doors, and stable doors throughout Southampton and Hampshire. Perfect for residential properties, rental properties, and commercial premises requiring a high-quality entrance solution.

Get Your Free Doors Quote

Soliddoor Composite Door Styles

Explore our stunning collection of composite door designs. From traditional elegance to contemporary chic, find the perfect style for your Southampton home.

Traditional Doors

Classic Elegance

  • Period-style panel designs
  • Beveled and leaded glass options
  • Authentic Victorian & Edwardian styling
  • Traditional brass or chrome furniture
  • Deep woodgrain finishes

Perfect for: Period properties, conservation areas, heritage homes requiring authentic character.

Contemporary Doors

Modern Design

  • Clean, minimalist lines
  • Large glazed panels for natural light
  • Sleek stainless steel hardware
  • Smooth or subtle textured finishes
  • Bold anthracite grey & black options

Perfect for: New builds, modern extensions, contemporary homes seeking striking entrance features.

Cottage Doors

Rustic Charm

  • Traditional stable door designs
  • Top and bottom sections open independently
  • Country-style hardware & accessories
  • Rich oak & rosewood finishes
  • Small window panels with cottage glazing

Perfect for: Rural properties, country cottages, homes seeking traditional farmhouse appeal.

Glazed Designs

Maximum Light

  • Full or half-glazed panels
  • Decorative glass with stunning patterns
  • Obscure glass for privacy
  • Beveled, etched, and sandblasted options
  • Triple-glazed for security & insulation

Perfect for: Hallways needing natural light, properties valuing brightness and style together.

Side Panels

Grand Entrances

  • Single or double side panels
  • Matching glass to main door
  • Creates impressive wide entrance
  • Additional natural light in hallway
  • Fixed or opening panel options

Perfect for: Wide doorways, creating statement entrances, maximizing hallway light.

Color Options

Endless Possibilities

  • 20+ colors including white, cream, grey
  • Popular anthracite grey & black
  • Traditional red, blue, and green
  • Woodgrain effects: oak, rosewood, darkwood
  • UV-stable - colors won't fade

Perfect for: Matching existing color schemes, making bold statements, personal expression.

See Our Doors in Person

Visit our Southampton showroom or book a free home consultation to see door samples, explore color options, and feel the quality of Soliddoor composite doors firsthand. Our experts will help you choose the perfect design for your home.

Book Free Consultation

Conservatories

Beautiful living spaces that add value and light to your home

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Bespoke Liniar Conservatories

Transform your Southampton home with a beautiful Liniar conservatory that creates valuable extra living space and floods your property with natural light. Our conservatories are individually designed to complement your home's architecture and meet your specific requirements.

Whether you're looking for a classic Victorian style, a spacious Edwardian design, a practical lean-to, or a contemporary orangery, we'll create a conservatory that perfectly suits your needs, budget, and lifestyle.

Key Features & Benefits

  • Bespoke design service tailored to your property dimensions and architectural style
  • High-performance glazing with advanced thermal efficiency for year-round comfort
  • Energy-efficient UPVC construction reduces heating costs and maintains comfortable temperatures
  • Choice of roof styles: polycarbonate, glass, or solid Supalite insulated roofs
  • Victorian, Edwardian, lean-to, gable-end, P-shape, and T-shape styles available
  • Integral blinds and ventilation options for climate control
  • Wide range of colors and finishes to match or complement your existing windows and doors
  • Full project management from initial design through planning to final installation
  • Building Regulations compliance including structural calculations and certification
  • 10-year guarantee covering materials, installation, and structural integrity

Popular Conservatory Styles

Victorian Conservatory: Featuring ornate styling with a multi-faceted bay front and steeply pitched roof. Perfect for creating an elegant period-style living space with lots of character.

Edwardian Conservatory: Also known as Georgian, these conservatories feature a square or rectangular shape that maximizes internal floor space. Ideal for dining areas or home offices.

Lean-To Conservatory: Simple, versatile design with a pitched roof that leans against your property. Perfect for bungalows or homes with height restrictions, and excellent value for money.

Gable-End Conservatory: Features a high, vaulted roof with a stunning triangular front panel. Creates an impressive sense of space and allows maximum light penetration.

P-Shape & T-Shape: Combination designs that blend different conservatory styles to create larger, multi-functional spaces perfect for open-plan living.

Planning & Building Regulations

Most conservatories are built under Permitted Development rights and don't require planning permission. However, we'll assess your specific situation and handle all necessary Building Regulations applications, structural calculations, and certification to ensure complete compliance.

Uses For Your Conservatory

Our clients use their conservatories for dining rooms, family lounges, home offices, playrooms, garden rooms, gyms, music rooms, and much more. The additional space not only enhances your lifestyle but typically adds 5-10% to your property value.

Ideal for: Creating additional living space in Southampton properties without the cost and disruption of a traditional extension. Perfect for enjoying your garden year-round while adding significant value to your home.

Get Your Free Conservatory Quote

Liniar Conservatory Styles Guide

Choose from our range of conservatory designs, each offering unique benefits and aesthetics to complement your Southampton home.

Victorian Conservatory

Classic Elegance

  • Multi-faceted bay front (3, 5, or more sides)
  • Steeply pitched ornate roof
  • Period-style ridge cresting available
  • Maximum natural light from all angles
  • Traditional character & charm

Perfect for: Period properties, adding character, creating elegant entertaining spaces.

Edwardian Conservatory

Practical Space

  • Square or rectangular floor plan
  • Maximizes usable internal space
  • Flat front with angled sides
  • Easier furniture placement
  • Clean, symmetrical appearance

Perfect for: Dining rooms, home offices, maximizing floor space efficiently.

Lean-To Conservatory

Versatile Value

  • Simple pitched roof design
  • Ideal for properties with height restrictions
  • Excellent value for money
  • Works with bungalows & low eaves
  • Modern, minimalist aesthetic

Perfect for: Bungalows, budget-conscious projects, contemporary homes.

Gable-End Conservatory

Impressive Height

  • High vaulted roof creates grandeur
  • Triangular front panel feature
  • Maximum internal height
  • Dramatic light penetration
  • Creates stunning focal point

Perfect for: Making a statement, properties with room for height, spacious feel.

P-Shape Conservatory

Combined Design

  • Combines lean-to with Victorian/Edwardian
  • Creates two distinct areas
  • Ideal for larger gardens
  • Flexible room usage options
  • Maximum floor space

Perfect for: Large families, dual-purpose spaces, entertaining and relaxing.

Orangery Style

Premium Extension

  • More brick/wall than glass
  • Flat roof lantern for light
  • Feels more like extension than conservatory
  • Superior insulation
  • Architectural elegance

Perfect for: Luxury extensions, year-round use, adding significant property value.

Free Design Consultation

Not sure which style is right for you? Our experienced designers will visit your Southampton home, assess your garden and property, and recommend the perfect conservatory style for your needs and budget. We'll create a detailed design with 3D visualizations so you can see exactly how it will look.

Book Free Design Consultation

Supalite Replacement Roofs

Transform your conservatory into a year-round living space

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Supalite Tiled Conservatory Roofs

Is your conservatory too hot in summer and too cold in winter? Does rain drumming on the roof make conversation impossible? A Supalite replacement roof is the perfect solution, transforming your existing conservatory into a comfortable, usable space all year round.

Supalite roofs combine lightweight insulated panels with optional roof windows or skylights, providing exceptional thermal performance while maintaining natural light. The result is a room that feels like a genuine extension of your home.

Key Features & Benefits

  • Superior insulation (U-value 0.18 W/m²K) keeps your conservatory comfortable throughout the year - warm in winter, cool in summer
  • Dramatically quieter than polycarbonate or glass during rainfall - enjoy peaceful conversation even in heavy rain
  • Lightweight construction (just 20kg per m²) suitable for existing conservatory frames without structural modifications
  • Internal plastered finish creates a genuine room-like appearance ready for painting or wallpapering
  • Choice of external finishes including slate-effect tiles in multiple colors to match your property
  • Flexible glazing options: full skylights, roof lanterns, or traditional roof windows for natural light control
  • Fast professional installation typically completed in just 2-3 days with minimal disruption
  • Building Regulations compliant with full structural calculations and certification provided
  • Eliminates glare and overheating issues common with glass roofs
  • Comprehensive 10-year guarantee for materials, installation, and weatherproofing

How Supalite Works

The Supalite system uses a composite panel consisting of an insulated core sandwiched between aluminum external cladding and internal plasterboard. This creates exceptional thermal performance while remaining light enough for most existing conservatory structures.

The external layer is topped with lightweight tiles available in various colors including slate grey, terracotta, and black. These provide an attractive, traditional appearance that complements any property style.

Tangible Benefits You'll Experience

Energy Savings: Reduce your heating bills by up to 80% compared to a polycarbonate conservatory. Many clients find they can turn off separate conservatory heating entirely.

Increased Property Value: A Supalite roof transforms your conservatory from a seasonal space into a permanent room, typically adding £10,000-£15,000 to your Southampton property value.

Year-Round Comfort: No more abandoning your conservatory in summer due to heat or in winter due to cold. Use the space every day of the year.

Noise Reduction: The insulated construction provides excellent sound insulation from both rain and external noise.

Is Your Conservatory Suitable?

Most conservatories are suitable for Supalite roofs, including Victorian, Edwardian, lean-to, and gable-end styles. We'll carry out a free structural survey to confirm suitability and provide detailed recommendations tailored to your conservatory.

Planning & Building Regulations

Supalite roof replacements typically don't require planning permission under Permitted Development rights. We handle all Building Regulations applications, provide structural calculations, and arrange building control inspections to ensure full compliance.

Perfect for: Southampton homeowners looking to maximize their conservatory investment, create additional living space, reduce energy bills, and eliminate the problems of traditional glass or polycarbonate roofs.

Get Your Free Roof Quote

Download Our Brochures

Explore our complete range of products and find inspiration for your home

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Liniar Windows Brochure

Complete guide to our Liniar UPVC window range including casement, tilt & turn, sliding sash, and bay windows. Energy ratings, technical specs, and color options.

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Soliddoor Composite Doors

Explore our stunning Soliddoor composite door collection. Browse traditional, contemporary, and cottage designs with full color charts and glazing options.

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Liniar Conservatories

Comprehensive conservatory design guide featuring Victorian, Edwardian, lean-to, and gable styles. Includes technical specifications and customization options.

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Supalite Replacement Roofs

Discover how Supalite tiled conservatory roofs transform your existing conservatory. Technical details, tile options, and installation information.

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Complete Product Guide

Download our comprehensive brochure featuring all our products, company information, and why Prism Windows is Southampton's premier choice.

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Color & Finish Guide

Browse our complete range of colors and finishes including woodgrain effects, contemporary colors, and hardware options for all products.

Download All Brochures

Get all our product brochures in one convenient download

📦 Download All Brochures (ZIP)

Need Help Choosing?

Our brochures are packed with inspiration, technical details, and helpful information to guide your decision. Each brochure includes:

  • High-quality product photography and real installation examples
  • Detailed specifications including energy ratings and security features
  • Color charts and customization options
  • Customer testimonials and case studies from Southampton homeowners
  • Pricing guides and finance information
  • Warranty and guarantee details

Can't find what you're looking for? Contact our team on 023 8012 3456 and we'll send you any additional information you need, or arrange a free home consultation.