Our Smoothsash 400 Windows collection is meticulously manufactured in the UK, offering a sleek and innovative design that enhances both the appearance and efficiency of your home.

Smoothsash 400 Windows
10 Year Insurance Backed Guarantee
Over 30 years' industry experience
Elevating home comfort with advanced design
Explore the sleek functionality of our Smoothsash 400 Windows in Chesterfield, engineered for those who seek the perfect blend of modern aesthetics and exceptional energy efficiency. These windows stand out with their minimalist design, providing a clean and contemporary look that suits any architectural style.
The Smoothsash 400 series is built with security and durability at its core, featuring state-of-the-art locking mechanisms and supported by a comprehensive 10-year warranty. Designed with a unique, flush sash appearance that eliminates the traditional overlap seen in standard windows, these windows offer a refined and unobtrusive profile. Available in a variety of configurations, including casement, tilt and turn, and fixed pane options, and a range of colours and finishes, the Smoothsash 400 series allows for complete customisation to meet your specific design preferences.
Try this finance calculator and contact us for a free quote today!
Customise your windows to suit you
Alchemy
Sensations
- Material: Aluminium Polyamide
- Dual Colour: Yes
- Thermally Broken: Yes
- NBS Available: Yes
- WER Rating: A & B
- Typical U Value 1.4 W/M2K (using correct glass unit)
- Document L Compliant: Yes
- Kitemark: Yes
- Water tightness = AE2400
- Air Permability = Class 4
- Resistance to Wind = 2000+
- Security PAS 24: 2016
- Side Hung Max Width (mm): 864mm
- Side Hung Max Height (mm): 1400mm
- Top Hung Max Width (mm): 1400mm
- Top Hung Max Height (mm): 1500mm
- Fixed Maximum Width (mm): 2100mm
- Fixed Maximum Height (mm): 2100mm
- Glazing (mm): 28mm to 38mm double or triple glazed units
- Frame Depth (mm): 70mm