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Aluminium & Plastic Windows & Doors Extrusions

Frame, sash and sealing profiles designed for repeat manufacture and reliable fit

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Built for fit, weather and repeat production

Windows and doors look simple, until you need to make them repeatedly to the same feel and finish. The profile set has to hold tight interfaces: corner joints must pull square, sashes must run true, gaskets must compress consistently, drainage must work, and hardware must pick up cleanly without distorting the section. When any part of that stack drifts, you see it immediately in build quality - sightlines, closing feel, sealing performance, and the risk of callbacks and customer complaints.

We supply aluminium and plastic extrusions for window and door systems where controlled section geometry and repeatability matter. We support development and supply with design input, prototyping, fabrication, finishing and stockholding so profile sets are practical to manufacture and consistent across batches, repeat orders and call-offs.

Aluminium & Plastic Windows & Doors Extrusions - what we supply

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Aluminium Windows & Door profiles

Typical aluminium extrusion components for windows and doors include:

  • Outer frames

  • Sashes / vents

  • Meeting stiles and interlocks

  • Beads and glazing retainers

  • Cover caps and trims

  • Threshold sections

  • Couplers, mullions and transoms

  • Add-ons for head/drip details and reveals

  • Reinforcement or stiffening sections (where required by design)

Aluminium is chosen for durability, stiffness, corrosion resistance and finish quality. For system manufacture, the key is how the section behaves in fabrication: corner crimping or cleating, machining for hardware, and maintaining straightness and squareness through assembly. This is why aluminium profiles, aluminium door profiles, window frame extrusions, and other window and door profiles need to be developed around repeatable geometry, not just nominal section size.

Plastic Windows & Door profiles

Plastic extrusions commonly sit at the points that decide sealing, feel and long-term durability:

  • Glazing gaskets and wedge gaskets
  • Weather seals and perimeter seals
  • Co-extruded seals (rigid carrier with flexible lip where needed)
  • Thermal isolators / interface strips (where specified)
  • Packers, spacers and setting blocks (profiled variants)
  • Edge trims and protective inserts
  • Anti-rattle / wear strips for moving interfaces

 

We supply plastic window profiles and plastic door profiles where the requirement is functional: predictable compression, retention in the groove, clean corner behaviour, and durability through repeated opening/closing cycles. This includes weather seal profiles, gasket profiles for windows and doors and other plastic sealing profiles used across window and door profiles.

We know what matters in window and door extrusion supply

When you’re specifying window and door extrusions, performance comes down to more than profile size. The details inside the section shape how the product assembles, seals, drains and performs over time.

At BWC Profiles, we design extrusion supply around real-world manufacture, assembly and long-term reliability.

Precision where it matters

Critical features like glazing pockets, gasket grooves, interlocks, hardware points and drainage paths must repeat accurately every time. Small variation in these areas can affect sealing, fit, closing action and overall build quality. 

Stronger corners. Better assembly.

Reliable window and door systems depend on repeatable corner builds. We help ensure sections assemble square, maintain clean sightlines and support consistent joint integrity across production. 

Sealing that performs properly

A good closing feel comes from well-designed gasket behaviour. We develop gasket and seal profiles alongside the aluminium section so compression, retention and contact pressure work together — helping reduce drag, stretching, movement and premature wear. 

Drainage designed for real use

 Drainage has to keep working after machining, fabrication and installation. We design practical water paths that stay open, shed water effectively and avoid weak points or trapped debris. 

Hardware interfaces that stay stable

Locks, hinges, handles and rollers place local loads on a profile. We design stable fixing zones and accurate machining datums so hardware fits cleanly, clamps correctly and maintains alignment through repeated use.

Thermal interfaces that are manufacturable

 Where thermal breaks or multi-part assemblies are involved, consistency matters. We design mating features that assemble reliably, tolerate production variation and stay stable through temperature change and service life. 

Finish quality that supports your brand

Windows and doors are highly visible products, so finish matters. We help protect appearance through better section design, careful handling and coordinated finishing support — helping maintain surface quality across repeat batches and phased call-offs. 

We Provide design support that reduces risk

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Window and door systems often expand into full product families. Early design decisions can make a major difference to manufacturability, scrap rates and long-term consistency. 

We support customers with:

• Stable geometry at key sealing and glazing features

• Practical wall transitions and radii

• Datum strategies for repeat machining and assembly

• Designs that tolerate production variation

• Profile development balanced against tooling and scrap risk

We can also support prototyping so fit, gasket behaviour and hardware pick-up can be checked before you commit fully to bespoke window extrusions, bespoke door extrusions and related window and door profiles.

Why BWC Profiles

Windows and doors demand repeatability. A profile set that’s nearly right becomes expensive fast, through rework, adjustment time, inconsistent feel, sealing issues and batch variation.

At BWC Profiles, some of the services we support window and door extrusion supply with:

BWC Profiles Aluminium Window and Doors Extrusion

Aluminium

Aluminium extrusions for frames, sashes, beads, thresholds and trims

BWC Profiles Plastic Windows and Doors Extrusion

Plastic

Plastic extrusions for gaskets, seals and interface components

BWC Profiles Technical Design & CAD

Technical design

Design input and prototyping to validate build behaviour early

BWC Profiles CNC and Fabrication Services

Fabrication

Fabrication support where repeat machining/prep is required

BWC Profiles Powder Coating and all Types of Finishing

Finishing

Finishing coordination for consistent appearance

BWC Profiles Stockholding and JIT support services

Stockholding

Stockholding and call-offs to support programmes and repeat production and scheduled supply

Which helps you reduce rework, improve build consistency and keep quality under control across repeat manufacture. And that matters because window and door extrusions, window and door profiles, window frame extrusions, door frame extrusions, sash profiles, glazing bead extrusions and threshold profile extrusions are only as reliable as the consistency of the full profile set across manufacture, fabrication and supply.

Talk to us about your profile requirements

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If you’re developing a new window or door system, refining an existing section for better build consistency, or trying to improve repeat supply quality, send your section details and we’ll help you turn them into a manufacturable, repeatable profile set.

•  Send drawings
•  Request design support
•  Discuss fabrication & finish
•   Plan call-offs