Three-Part uPVC Window

The Three-Part uPVC Window is the premier choice for living rooms, master bedrooms, and any space where a wider, more open window is desired without sacrificing ventilation. The central tilt-and-turn sash provides all the practical benefits of modern uPVC opening systems, while the two fixed side panels maximise natural light and create a visually generous glazed area that enhances any room. Custom-measured and professionally installed by Dublin Blinds, every three-part window is built to fit your exact opening and engineered to perform efficiently for decades.

Features & Benefits

• Central Tilt-and-Turn Sash: The middle panel operates as a full tilt-and-turn window – tilt inward from the top for secure, rain-safe background ventilation, or swing fully inward for easy cleaning of both interior and exterior glass surfaces without any ladder or external access required
• Two Fixed Side Panels: The flanking panels are fixed, providing maximum structural stability, increased glazed area, and an uninterrupted view. The result is a generous, light-filled window that balances openness with practicality
• Energy-Saving Glazing: Energy-saving double-glazed units with low-emissivity coating as standard across all three panels, ensuring consistent thermal performance across the full window width
• Wide Format Stability: Multi-chamber profile construction provides the structural strength needed for wider three-section formats while maintaining low deflection and long-term shape retention
• Made to Measure: Manufactured to your exact dimensions – the three-section format can be adapted to suit any width and height requirement, with mullion positions adjusted to suit your opening and architectural preference
• Zero Maintenance: uPVC frames require no painting, varnishing, or sealing. Wipe clean with a damp cloth and the frames maintain their brilliant white appearance for life
• Grey Sealing Gaskets: Continuous grey EPDM gaskets ensure a weathertight seal at every panel junction and perimeter, maintaining thermal performance and preventing air infiltration

Specifications

• Configuration: 3-section – 2× fixed side panels + 1× central tilt-and-turn sash
• Opening system: Tilt-and-turn (centre panel, inward opening, dual position)
• Glazing: Double-glazed energy-saving unit (triple glazing available on selected profiles)
• Frame colour: Brilliant white standard; laminated wood-effect or colour films available
• Profile options: S400 (4-chamber, 58mm) / S500 (5-chamber, 60mm) / S700 (6-chamber, 70mm) / V90 (Class A, 6-chamber, 90mm)
• Dimensions: Made to measure – all widths and heights available
• Seal: Grey EPDM sealing gaskets, weathertight perimeter and mullion seals
• Hardware: Multi-point locking tilt-and-turn mechanism on centre sash; fixed panel beading on side panels

Profile Systems Explained

Three-part windows span a larger area than two-part windows, which makes profile selection even more important for long-term structural and thermal performance. Our four available profiles serve different levels of requirement:

• S400 – 4-Chamber (58mm): Entry-level profile suitable for utility spaces and budget-conscious applications. A practical upgrade from single-glazed or aluminium frames at lower cost
• S500 – 5-Chamber European (60mm): Mid-range European profile – the practical choice for apartments and general residential use where strong thermal performance is wanted at a reasonable price
• S700 – 6-Chamber (70mm): The standard choice for quality residential projects. Thermal resistance of 0.85 m²°C/W, meeting building regulation targets and delivering meaningful reductions in heat loss across the full width of larger window openings
• V90 – Class A German (90mm): Maximum performance 90mm profile. For new builds targeting BER A ratings, renovation projects improving to A or B BER, and homeowners who want the definitive standard in window thermal performance.

How to Order

Ordering your new three-part uPVC window starts with a free home survey. Our team visits to measure your openings precisely, advise on the best profile specification for each room, and discuss colour and glazing options. We coordinate the full process – manufacturing, delivery, and installation by our own experienced fitters. Every window is checked at completion to ensure smooth operation, perfect weathertight sealing, and alignment. Contact us on (01) XXX XXXX or request a callback to book your free survey today.