Sliding Sash Window.
The timber sash look your street expects, with an effortless spring-balance glide and tilt-in cleaning. A rated, made in the UK to your exact opening.
Sliding Sash Window
uPVC Window System
Glazing
24mm Argon
Energy
A Rated
Security
PAS 24
Frame
30 Finishes
Hardware
6 Finishes
Warranty
10 Year
The Classic Sash. Reimagined.
The vertical slider that defined our period streets, rebuilt in multi-chambered uPVC. A concealed spring balance glides both sashes and holds them at any height, both tilt inward for cleaning, and run-through sash horns with a deep bottom rail keep the detailing honest. A rated, 24mm argon glazed, 10-year guarantee.
Engineered for everyday excellence.
Made to measure in the UK. Authentic period detailing outside, modern engineering inside, and four good reasons it belongs on your home.
True period character
Run-through sash horns, a deep bottom rail and woodgrain foils that pass in conservation streets. Detailing that mirrors original timber joinery.
Effortless operation
A concealed spring balance replaces cords, weights and pulleys. Sashes glide smoothly and hold at any height, with nothing to snap or stick.
Clean from inside
Both sashes tilt inward, so you can clean the outside of the glass from the comfort of the room. No ladders, even on upper floors.
Weatherproof & secure
Tested to 120mph winds and Class 6A water tightness, with multi-point cam locking as standard and a PAS 24 upgrade available.
Specifications
1.2
U-Value (W/m²K)
Excellent thermal efficiency to help reduce energy bills.
PAS 24
Security
Tested to PAS 24:2016 for enhanced protection and peace of mind.
A
Energy Rating
A rated as standard for a warmer home and lower energy bills.
24mm
Argon Glazing
Argon-filled double glazed units with warm-edge spacers for comfort and quiet.
Multi-point
Locking
Multi-point cam locking at the meeting rail for superior security.
100%
Recyclable uPVC
Sustainable by design. 100% recyclable uPVC.
10 Years
Guarantee
Backed by our 10-year manufacturing guarantee.
30+
Colours
A wide choice of colours to suit every style.
Technical
Built for performance
Spring-balance vertical slider on a multi-chambered uPVC frame, with no cords, weights or pulleys. 24mm argon-filled double glazed units with warm-edge spacers, and both sashes tilt inward for cleaning. Rated Class 4 air tightness, Class 6A water tightness and Class 3A wind load (1200Pa), with a 10‑year manufacturer guarantee.
Configurations
Flexible design options
Single vertical sliders, coupled and bay arrangements, and dummy sash options, with Georgian and astragal bar layouts to match the originals.
Finishes
Made to match your space
20 colourways held in stock, with 30 available across the heritage woodgrain collection. Smooth, grained, and woodgrain foils that never need repainting, with dual-colour options for a different finish inside and out. All finishes carry the same 10-year guarantee.
Make it yours.
Selected colour · Agate Grey
How long does installation take?
Most window installs are completed in 1-2 days. Doors typically take 1-3 days depending on threshold work. Full-house or multi-room replacements run 3-7 days. We give you a precise schedule at the survey stage so you can plan around it, no open-ended jobs.
Is the installation FENSA-registered, and do I get the certificate?
Yes. Apex Glazing is FENSA-registered (Reg 40373). On completion you receive a FENSA certificate, which satisfies Building Regulations Part L compliance and removes the need for separate council approval. Certificates are issued within 30 days and stored in your FENSA online account for future house sales.
What warranty do I get?
10-year manufacturer warranty on the product itself (frame, glass seal, hardware) plus a 12-month workmanship guarantee from us on the installation. We've been trading since 2005 with 6,340 completed projects and a 5.0-star Google rating, we'll come back if anything's not right.
Do you remove and dispose of the old windows or doors?
Yes, removal of existing units, safe disposal at a licensed waste facility, making good of internal and external reveals, and a thorough final clean-up are all included in the quoted price. There are no extras for skip hire, scaffolding, or waste removal.
Can you match existing windows for a phased replacement?
Yes. We can RAL colour-match the new frames to your existing units, replicate sightlines, glazing bar layouts, and hardware style to keep a phased replacement consistent. Bring photos to the survey, or we'll come and measure the existing windows so the new ones blend in seamlessly when fitted alongside.
