Spring balance mechanism
Smooth, effortless vertical sliding with spring balance operation. No cords or weights to fail, and both sashes tilt inward for easy cleaning.
Windows
Sliding Sash Windows
uPVC sliding sash windows supplied and fitted in Romford and Essex for period-style fronts, bays, and upper floors.
- Romford and Essex supply and fit
- 128mm deep sash-style frame
- Spring balance operation
- Tilt-clean function and restrictors available
Overview
What is a sliding sash window?
Vertical sliding sash windows are often the right replacement for Victorian, Edwardian, Georgian, and bay-fronted homes across Romford and Essex where the front elevation still needs proper sash proportions. Cii Double Glazing supplies and fits uPVC vertical sliding sash windows with a deep 128mm frame, spring-balance operation, tilt-clean access, and survey checks for horn detail, bar layout, trickle vents, restrictors, and room-by-room glass choices. The aim is to keep the period look from the road while making the windows warmer, easier to clean, and simpler to maintain than ageing timber box sashes.
High security cam locks available
Child safety restrictors on bottom sash
Run-through sash horns available
Brushpile interlock for draught-free operation
Welded or mechanical joints
100% lead-free, recyclable uPVC
Personalise Your Window
Colours & Finishes
Frame colour: Smooth White
Standard colours
Extended lead time colours
Dual colour may be available, with different interior and exterior frame finishes depending on the range.
Sash hardware finish: White
Sliding sash hardware is about the visible cam locks, sash lifts, restrictors, and period feel. The finish should support the window style rather than draw attention away from it.
Made to measure. We confirm the colour, glazing, handle finish, and opening layout during your survey.
Sash hardware finish: White
Sliding sash hardware is about the visible cam locks, sash lifts, restrictors, and period feel. The finish should support the window style rather than draw attention away from it.
Made to measure. We confirm the colour, glazing, handle finish, and opening layout during your survey.
Product fit
For Romford homes where vertical sash proportions matter
Sliding sash windows are not just another opener style. They change the character of the elevation, especially on Victorian, Edwardian, Georgian, and bay-fronted homes in Romford and Essex where vertical proportions are part of the house. They make most sense when the outside look matters as much as the room-by-room function.
Best fit for
- Period-style front elevations where vertical window proportions suit the house
- Bay windows and upper floors where a traditional sash rhythm is important
- Homes wanting a period look without returning to painted timber maintenance
Consider another option when
- The house has a simpler modern elevation where casements would look cleaner
- The budget needs the most practical full-house replacement route
- A wide clear opening or inward cleaning function matters more than period appearance
What we check on survey
- We check reveal depth, frame position, horn detail, and bar layout from outside.
- We discuss which elevations genuinely need sash windows and which can stay simpler.
- We confirm cost drivers, restrictors, tilt-clean function, obscure glass, and trickle ventilation room by room.
Useful comparisons
Casement windowsCompare the practical default for most full-house uPVC replacements.
Flush sash windowsCompare a flatter timber-look casement for visible elevations.
Sash horn windowsCompare traditional horn detailing without always choosing a true sliding sash.
Tilt and turn windowsCompare inward-opening windows for cleaning access and secure ventilation.
Aluminium casementsCompare the slimmer aluminium frame route for modern elevations and larger openings.
Aluminium tilt and turnCompare aluminium sightlines with inward cleaning and secure tilt ventilation.
Optional Upgrade
Privacy control only where it suits the sash look
Sliding sash windows are often chosen for period proportions, so integral blinds are not a blanket recommendation. They are worth discussing on overlooked rooms, upper floors, and modernised interiors where privacy is more important than a traditional curtain or shutter treatment.
Selective sash upgrade
A practical option for the right room, checked against the period look during survey.
Useful on sliding sash when
- The room is overlooked from the street or neighbouring properties
- You want privacy without covering the sash frame detail
- The opening is less period-sensitive than the main front elevation
Blind types we can discuss
Magnetic integral blinds
A slim magnetic slider raises, lowers, and tilts the blind inside the sealed glass unit.
Electric integral blinds
Remote operation suits larger panes, harder-to-reach glass, and cleaner contemporary rooms.
What we check
- Glass unit size and cavity depth
- Handle position, reveal depth, and room layout
- Whether magnetic or electric operation is worth pricing
We will flag if shutters, curtains, or standard glass treatment are a better fit for the property character.
Ask about sash blind upgradesEngineering Detail
What makes our sliding sash windows different
Meeting rail detail
The interlocking meeting rail provides a weather-tight seal between upper and lower sashes, with brushpile interlock eliminating draughts.
Sash lock security
High security cam locks secure both sashes in the closed position with multi-point engagement for comprehensive resistance to forced entry.
Welded corner joints
Precision-welded corners give the 128mm frame structural rigidity that exceeds mechanical jointing, with no gaps or weak points at the corners.
How It Works
From Survey to Sign-off
Step 1
Survey
We visit, measure, and advise on the right configuration for your property.
Step 2
Install
Our Cii team installs with clean, tidy workmanship.
Step 3
Sign-off
Final checks, handover, and Assure certification where required.
Free Survey
Ready to price up your sliding sash windows?
Tell us the opening and the finish you want, and we will survey it, confirm the sliding sash windows specification, and give you a fixed written quote with no obligation rather than a generic estimate.
Free surveyFixed quoteDirect Cii installation team
Checkatrade
“Had sliding sash windows fitted throughout. The quality is brilliant, they look period-authentic, and the tilt-clean feature is a godsend. Thoroughly recommend CII.”
Google
“Outstanding from start to finish. The casement windows are a perfect fit and the energy difference is already noticeable. The lads were tidy, efficient, and clearly knew their trade.”
Google
“Replaced all 12 windows across our Victorian terrace. Every window fits perfectly, the sightlines are great, and the house is noticeably warmer. Superb job.”
Questions Answered
