For a sumptuous touch of class

Successfully able to replicate timeless timber window systems or more contemporary style windows, most commonly seen in modern buildings or offices, our Customade aluminium window profiles compliment both contemporary and traditional applications. Conserving warmth and energy effectively, this in turn reduces heat loss considerably via innovative polyamide thermal break technology. With energy efficiency firmly ingrained within their design, our Alitherm 600 aluminium windows are building regulation compliant; ideal for heritage applications. In contrast to our Alitherm 300 window system, which is more suitable for modern and new build applications.

Our Alitherm 300 window system is able to achieve a Window Energy ‘A’ rating, whereas the Alitherm 600 system can achieve a healthy ‘B’ rating. Combined with some of the lowest U-values possible, our Customade aluminium windows are able to accommodate both double and triple glazing comfortably.

Book an appointment

Range of locking handles

Weatherproof

10 year guarantee

Customise your windows with our great range of colours & finishes

Add a superb finishing touch to your newly installed Customade aluminium windows, with a choice of standard or non-standard colours. This includes metallic, dual colour, Smart’s Sensations textured, and Alchemy anodised effect finishes. Complimenting contemporary and traditional homes alike, pick a finishing touch from our extensive range that truly fits your personality and style; providing remarkable curb appeal. We can also repair your existing aluminium frames, if required.

When it comes to ongoing maintenance, our aluminium window range provide South West homeowners with the ultimate peace of mind as they’re virtually maintenance-free. Effectively eliminating painting and varnishing whilst retaining exceptional weatherproofing qualities, this conveniently allowing your aluminium windows to make a statement for many years to come.

Enquire

Popular colours

More available upon request. Colours may vary across devices. Please request a colour swatch for an accurate representation.

Off White

Off White

Grey

Grey

Dune

Dune

Antique Grey

Antique Grey

Province Green

Province Green

Olive Green

Olive Green

Steel Blue

Steel Blue

Ocean Blue

Ocean Blue

Dark Red

Dark Red

Cocoa Brown

Cocoa Brown

  • Downloads
  • Glazing
  • Security
  • Styles
  • Downloads

    Glazing

    Glazing

    Whether you’re looking for extra privacy, a textured effect to match existing windows/doors, additional acoustic insulation or self-cleaning/solar control glazing, our premium range of textured, etched and technologically advanced glass suits both modern and more traditional homes across the South West.

    Enquire
    Charcoal

    Charcoal

    Taffeta

    Taffeta

    Pelerine

    Pelerine

    Stippolyte

    Stippolyte

    Minster

    Minster

    Oak

    Oak

    Florielle

    Florielle

    Mayflower

    Mayflower

    Everglade

    Everglade

    Contora

    Contora

    Digital

    Digital

    Chantilly

    Chantilly

    Security

    Security

    Whichever Customade aluminium window profile you choose, your comfort and security come first above all else – more often than not, security is the main reason windows need to be replaced. Made to measure, our aluminium window locking mechanisms are exceptionally user-friendly & secure. This provides homeowners across the South West with complete peace of mind that their home is in safe hands; whatever life throws at them. Our Alitherm 300 series also have the option of either multi-point or cockspur locking handles for complete personalisation.

    Enquire

    Styles

    White aluminium casement windows installation

    White aluminium casement windows installation

    Liam Davidson

    "An excellent service all round"

    An excellent service all round. Very friendly and took time to ensure the windows were exactly as I wanted. The windows themselves are well made and have completely transformed my house.

    Anthony Derrick

    "Thoroughly recommend Seal-lite"

    We had Seal-lite install full new double glazing including bi-fold doors a little while ago, excellent products and service. Their after sales service by Simon is very, very good indeed. Thoroughly recommend Seal-lite.

    Chris Townsend

    "Excellent service from start to finish"

    An excellent job done by Paul and his team. Transforming the front of our house with Georgian bar style windows and a fantastic new bay window. Finished off by a new door. Highly recommended excellent service from start to finish.

    Helen Marks

    "Very patient and understanding"

    I would absolutely recommend Seal-Lite Ltd. They have been so helpful helping me to match my new aluminium windows to the existing house. They have also been very patient and understanding with me having to delay installation for several months due to problems with my builder. Kevin fitted the windows very carefully and did an excellent job. A couple of minor things were no problem and resolved quickly to my full satisfaction. I would like to thank Paul and Pete and the team for being so so helpful. A pleasure to do business with this company – I wish all companies were like this.

    View more reviews on

    Google Reviews
    CertassQA National WarrantiesSwish Approved InstallerCEN Solutions Bronze

    Excellent aftercare service and on-site service engineer for complete peace of mind

    Always striving to look after our customers wherever possible, we are extremely proud of the high standards of craftmanship, fabrication, installation and aftercare services that our highly skilled team continue to excel at delivering. Our excellent aftersales service and on-site service engineer proactively deal with any issues that occasionally occur with our products directly - no job is too small for our service engineer!

    Get in touch
    Seal-Lite Showroom

    Visit our showroom

    It’s important for homeowners and businesses alike to actually see the quality of our products up close. So, why not come and see the products for yourself?

    Home under construction

    New build projects

    With an outstanding range of uPVC and aluminium products supplied directly to our trade customers, we are highly experienced in working alongside architects and contractors on new build projects.

    Trade installaters

    Trade supply

    As well as serving the local community, we have many established connections with various different trade customers across the South West who value the high-quality products that we produce.