
Aluminium windows
Slim, modern aluminium windows.
Sheerline aluminium windows manufactured in Bristol for contemporary homes, extensions, renovations and new-build projects.
01
Clean lines, carefully specified
Slim profiles can increase the apparent glass area while giving a crisp finish. Frame system, window style, glass and hardware are selected around the opening, performance requirement and appearance of the property.

02
Manufactured in Bristol
We fabricate aluminium windows in Bristol after the sizes and specification are agreed. The same team can prepare supply-only orders or coordinate survey, manufacture and local installation.
- Made to measure
- Clear specification before manufacture
- Supply only or local installation

03
Coordinated across the project
Aluminium windows can sit alongside matching doors or stand alone as a strong visual feature. Consistent frame colour and carefully selected opening lights help a whole elevation read coherently.

Quick enquiry
Ask about this product
Share the approximate sizes, window styles and preferred finish, and our Bristol team can prepare the next step for your aluminium window enquiry.
Send an enquiryPlanning and specification
What to consider when planning slim-framed aluminium windows
A good quotation begins with the property and the way the opening will be used. We look at sightlines, opening sizes, thermal specification, glass weight, colour and hardware. The best answer is not always the same for every room, so it is worth considering privacy, daylight, furniture positions and how often an opening will be used before settling on a specification.
Master Plastics can discuss Sheerline aluminium systems for extensions, renovations and new-build work. Explore our modern new-build aluminium glazing and full-height aluminium gable glazing projects. We manufacture made-to-measure products in Bristol and can provide supply only or professional installation across Bristol and nearby areas, depending on the project. Installed work is surveyed before manufacture; supply-only customers remain responsible for confirming their order sizes and fitting requirements.
From first enquiry to finished order
Share plans or photographs showing the desired sightlines, mullion positions and relationship to nearby doors. Large panes also require early consideration of glass weight, access and safe handling.
We quote the actual Sheerline system and configuration rather than treating all aluminium windows as equivalent. Colour, glass, opening style, required performance and installation conditions affect the final price.
Sheerline system detail
Slim sightlines with a thermally broken frame
Sheerline offers different aluminium window ranges for different architectural and performance requirements. Classic openers can provide 59 mm sightlines, while Prestige offers a broader range of casement, French and tilt-and-turn arrangements.
- Thermlock multi-chamber thermal-break technology
- Powder-coated finishes and selected dual-colour combinations
- Fixed, casement, French, tilt-and-turn, curved, bow and bay possibilities across the range
- Double or triple glazing specified with the chosen system
Prestige manufacturer data gives U-values of 1.4 W/m²K double glazed and 1.0 W/m²K triple glazed for qualifying configurations. We confirm the range and performance applicable to your order.
Manufacturer reference: Sheerline aluminium window range.
Work completed by Master Plastics
Aluminium for a landmark upper floor
At Beacon Tower in Fishponds, Master Plastics completed the window work to the top floor. Dark frames sit within the rooftop cladding beneath the projecting canopy and continue the long horizontal rhythm of the building below.
Read the Beacon Tower story →Good to know
Questions about aluminium windows
Why choose aluminium windows?
Aluminium combines strength with slim frames, making it useful where daylight, larger panes and clean sightlines are priorities. It works particularly well in modern extensions, garden rooms, renovations and coordinated new-build schemes.
Are modern aluminium windows thermally efficient?
Yes, when the correct thermally broken frame, glass and installation specification are used. Sheerline systems use a multi-chamber Thermlock thermal core; actual whole-window performance depends on the selected system and configuration.
Can aluminium be different colours inside and outside?
Dual-colour options may be available, allowing the exterior to coordinate with the building while the interior suits the room. Availability and lead time are confirmed before manufacture.
Talk to Master Plastics
Planning new windows or doors?
Tell us what you need and we can discuss product options, supply-only manufacture or professional local installation.
