Sliding Sash Windows

Sliding sash windows (also called vertical sliding sash or box sash windows) are the defining feature of Georgian, Victorian, and Edwardian homes. With their distinctive two sashes that glide smoothly up and down, they offer timeless proportions, graceful symmetry, and superb natural ventilation – all while now delivering 21st-century energy efficiency, security, and low maintenance.

Why Sliding Sash Windows Remain Britain’s Favourite Heritage Window

1. Authentic Period Charm -Perfectly replicates the original 18th–19th century timber sashes with slim 30–45 mm meeting rails, traditional sash horns, deep bottom rails, and delicate glazing bars.
2. Both Sashes Tilt Inwards (on modern systems) -Safe, easy cleaning from inside the house – no more ladders or reaching over dangerous openings.
3. Superb Ventilation Control -Open top, bottom, or both for gentle trickle ventilation or full “chimney-effect” cooling – ideal for summer nights.
4. Top-Tier Modern Performance
   • A or A+ energy rating (U-values down to 1.2–1.4 W/m²K with slim double or vacuum glazing)
   • Spiral or concealed spring balances for fingertip-smooth operation
   • High-security locking and anti-jemmy features
   • Acoustic glazing options for busy roads

Beautiful Traditional Details

• Georgian bars, astragal bars, or slim stick-on bars
• Run-through or applied sash horns
• Monkey-tail or Brighton fasteners
• Choice of deep cills, arched heads, or curved horns

• Listed buildings & conservation areas
• Victorian, Georgian, and Edwardian homes
• Period renovations and sympathetic new builds
• Anyone who wants classic British style without the old draughts and rattles

Keep the soul of your period home while enjoying warmth, silence, and security. 

Contact us today for a free heritage survey and see how our sliding sash windows can restore beauty and performance in perfect harmony.