Ultimate

Outstanding aesthetics and exceptional performance. The Ultimate is, quite simply, the UK’s most authentic timber alternative sash window.

We’ve re-engineered timber alternative sash windows from the ground up, looking at every seam and detail that differed from a timber original and designing it out. The ultra-slim 35mm meeting rail, the seamless run-through sash horns and even the internal sash interlock – has been redesigned to achieve what no other timber alternative sash window can; a smooth, seamless finish. The result is that even from close up, only an expert can tell that it’s not timber.

Based around our innovative true mechanical jointing system, the Ultimate is built in exactly the same way as timber. There are no mitred welds or fake mechanical joints here, just simple, strong, joinery-style butt joints - horizontal on the frame and vertical on the sashes - just like a timber original.

The attention to detail matters.

But while the Ultimate may look identical to traditional timber sash windows, the one place it's designed to be different is in performance. 'A'-rated energy efficiency, high security and independently tested sound insulation means that not only will your home look great with the Ultimate, it will be warm, quiet and secure.

Add all this together, and you get a modern sash window that looks and performs better than anything else on the market

That's why we call it Ultimate 

• Closed-end true mechanical joints
• Ultra-slim 35mm seamless midrail
• Seamless run-through sash horns
• Slim putty-line external profiles
• Deep bottom rail
• Optional removable staff bead
• Optional external chamber covers 
• Aluminium-mounted authentic astragal bars
• Optional period deep cill
• Range of finishes and woodgrains
• Tilting sashes for simple cleaning
• Maintenance-free - no more painting
• Widely specified in conservation areas