Double Glazing in Slough

Reliable service and customer support

The best double glazing products are always backed up by a reliable manufacturing process, and at Direct Trade Windows, this is paramount. We’re set up with the latest state-of-the art machining which allows for streamlined fabrication. Our Slough factory is equipped to manufacture a range of double glazing products that have a reputation for being difficult and time consuming to make. Streamlining processes also means we can maintain competitive lead times, ensuring our customers across Slough and the rest of the UK never fall behind.

Aluminium sliding doors providing seamless indoor-outdoor living in a contemporary house.

Why choose Direct Trade Windows?

For over two decades, we’ve been dedicated to expertly manufacturing and installing a wide range of premium products to the highest standard, maintaining stable turnaround times, and providing outstanding customer support, making us the ideal supplier. Our fabricators and fitters have years of experience, meaning Direct Trade Windows is the double glazing company you can rely on.

You can rely on Direct Trade Windows for:

• Premium product offerings
• Bespoke products
• Quality manufacturing and streamlined fabrication
• Competitive lead times
• Highly skilled in-house manufacturing team
• Unrivalled customer support
• For a free, no-obligation quote, contact us today.

Modern internal partitions with sleek black frames and glass panels.

Technical Specifications
Colours & Finishes

Technical Specifications

DTW supplies and installs high-performance aluminium double and triple glazed window and door systems in Slough and the surrounding Thames Valley — all systems thermally broken, PAS 24 security certified, and fully compliant with current Building Regulations Part L.

Key Specifications

Thermal Performance: U-values from 1.0 W/m²K (triple glazed); 1.4–1.6 W/m²K (standard double glazed) — all systems exceed current Part L minimum requirements
Security: PAS 24:2022 certified across all window and door products; multi-point locking as standard; Secured by Design available
Weather Performance: Air permeability Class 4; watertightness Class 5A–9A; wind resistance Class AE 2400 (BS 6375-1:2009)
Glazing Units: Double glazed 24–36mm units standard; triple glazed 36–54mm units available; warm-edge spacer bars throughout; low-E coatings standard
Frame Technology: Polyamide thermal break profiles throughout — eliminating cold bridging and condensation risk at frame-to-glass junction
Acoustic Performance: Acoustic laminated glazing units available; up to Rw 42dB reduction for noise-sensitive locations
Products Available: Casement windows, tilt & turn windows, sliding sash, bifold doors, sliding doors, front entrance doors
Finishes: Full RAL powder coat palette; anodised options; dual-colour inside/outside

DTW operates from Surrey and covers Slough, Windsor, Maidenhead, and the wider Thames Valley for residential and light commercial projects. All installations are carried out by DTW's own fitting teams — not subcontracted — with full aftercare and a manufacturer-backed product warranty. Slough's proximity to the M4 corridor and a substantial stock of 1960s–1980s residential and commercial buildings means energy upgrade and heritage replacement programmes are a core part of DTW's local workload.

Glass Options

All double-glazed windows and doors can be specified with a range of glass types to meet thermal, acoustic, solar control, privacy, and safety requirements. Our team will recommend the optimal glazing specification for your project during the survey and quotation stage.

Colours & Finishes

DTW aluminium double-glazed windows and doors are available in any RAL colour to any BS/RAL specification, with powder coat applied under Qualicoat-certified conditions for consistent, durable results. Standard lead times apply to the most common specifications; bespoke or dual-colour finishes are available with extended lead times.

Standard Finish Options

Polyester Powder Coat: Full RAL colour range; smooth, fine texture, and matt texture options; Qualicoat Class 1 certified
Dual Colour: Different colours inside and outside on the same frame — common for heritage and period properties requiring white internally
Anodised: Natural silver, bronze, gold, and grey anodised finishes; Qualanod certified; increased surface hardness and corrosion resistance
Metallic & Special Effect: Metallics, wood-effect foils, and textured finishes available across most systems

Most Specified Colours

Anthracite Grey (RAL 7016) — the most popular contemporary choice for residential and commercial projects
Jet Black (RAL 9005) — high-contrast, premium aesthetic; popular for steel-look and heritage applications
Traffic White (RAL 9016) — clean modern white; frequently paired with anthracite grey as a dual-colour finish
Cream (RAL 9001) / Signal White (RAL 9003) — warm white options for period and conservation properties
Heritage Bronze / Umber (RAL 8025/8028) — specified for listed buildings and conservation area projects

Dual-colour finishes are a popular choice for windows — anthracite grey or black externally with a clean white internal finish to match your interior.

A physical colour sample service is available on request. DTW can also match existing powder coat colours using spectrophotometer analysis where replacement or extension work requires continuity with existing frames.

Discover the perfect steel-look double glazing products for your next installation or home improvement project in Slough, wider Berkshire and London