Ecclesall · S11
Sash window glazing in Ecclesall, Sheffield
We work on sash window glazing across Sheffield, and Ecclesall is one of the areas it comes up most. The sash box is hollow and the counterweight pockets leak air, so the loss is around the window as much as through it — which is why a room-side pane, rather than a replacement, is the answer here. nothing is fixed into the sash box itself — the frame is fixed to the reveal lining, so historic joinery is untouched and the work is reversible Most enquiries here come from owner-occupiers doing one or two rooms at a time, so we price per opening rather than per house. Ecclesall is about 3 miles from central Sheffield, so a survey here is a short run for our team off the M1 J33.
What goes in, and why
| Window type | two vertically sliding sashes running in a boxed frame, usually with a horn detail on the upper sash (Georgian, Victorian and Edwardian, roughly 1750–1910) |
|---|---|
| Underlying problem | the sash box is hollow and the counterweight pockets leak air, so the loss is around the window as much as through it |
| System we fit | vertical sliding secondary units that mirror the original movement |
| Glass specification | 4 mm Low-E for thermal-led jobs, 6.4 mm laminated where noise is the driver |
| Measurement | we measure the reveal at three heights because sash openings are rarely square after a century of settlement |
| Heritage position | nothing is fixed into the sash box itself — the frame is fixed to the reveal lining, so historic joinery is untouched and the work is reversible |
Local detail that changes the job
A sash box is a ventilated void by design; most of the perceived draught comes through the pulley stiles rather than through the glass.
We avoid any fixing into the pulley stile or staff bead, so the install is fully reversible for a future owner or a conservation officer.
Ecclesall stock is Victorian and Edwardian and the prevailing glazing is vertical box sashes, which is why sash window glazing comes up here so often.
We measure the reveal at three heights because sash openings are rarely square after a century of settlement.
Ecclesall is a conservation area: nothing is fixed into the sash box itself — the frame is fixed to the reveal lining, so historic joinery is untouched and the work is reversible.
Quotes are written, itemised per opening, and hold for 60 days.
We will tell you when secondary glazing is the wrong answer — it happens, and it saves everyone time.
We survey with a sound level meter where noise is the driver, so the target is a number rather than an impression.
Thermal figures quoted are whole-window, not centre-pane, which is the honest way to state them.
Recent installs nearby
Ecclesall Road bay-window sound retrofit
Three-panel horizontal sliders across a 3.2 m Edwardian bay — Rw measured at 47 dB post-install.
Nether Edge Grade II sash retrofit
Six original box sashes fitted with balanced vertical secondary sliders — full listed-building consent secured in six weeks.
Kelham Island loft conversion
Four large steel-frame factory openings sealed with slim satin-anodised horizontal sliders. Post-install U-value 1.87 W/m²K.
Common questions
Will secondary glazing stop my sash windows rattling?
Yes, and it does it without touching the sash. The rattle is wind pressure moving a loose sash in its box, and a sealed room-side pane removes the pressure differential driving it.
Can I still open the sash behind it?
Yes. Vertical sliding secondary units move on the same axis, so both sashes stay operable.
Does it damage original joinery?
No. The fixing is into the reveal lining, not the sash box, and the whole system can be removed later without trace.
Can we do one room now and the rest later?
Yes. We template and price per opening, so a later phase is quoted at the same rate — there is no penalty for splitting the work.
Will it get in the way of curtains or blinds?
Rarely. Reveal-fixed units sit inside the existing recess; where the recess is shallow we face-fix and reposition the blind, which we flag at survey rather than on the day.
Local reference points
- Area
- Ecclesall (S11)
- Town
- Sheffield, South Yorkshire
- Housing era
- Victorian and Edwardian
- Typical windows
- vertical box sashes
- Landmark
- Ecclesall All Saints
- Conservation area
- Yes — room-side install standard
- Window style
- Sash Windows
- Period
- Georgian, Victorian and Edwardian, roughly 1750–1910
What happens next
- Step 1
Send a photo of the window — with two vertically sliding sashes running in a boxed frame we can usually tell you the likely system before we visit.
- Step 2
Survey in Ecclesall: we measure the reveal at three heights because sash openings are rarely square after a century of settlement.
- Step 3
Manufacture to the templated sizes with your chosen finish.
- Step 4
Room-side install with no external access and no alteration to the original frame.
Sash window glazing in nearby areas
Sash window glazing in Ecclesall — the short version
The sash box is hollow and the counterweight pockets leak air, so the loss is around the window as much as through it. We fit vertical sliding secondary units that mirror the original movement with 4 mm Low-E for thermal-led jobs, 6.4 mm laminated where noise is the driver, templated to your opening. The draught through the weight pockets is sealed and the original sash keeps operating normally.
Start with one room
Send the opening sizes for the worst room and we will price that first — extending later costs no more. Send a photo of the sash window glazing — with two vertically sliding sashes running in a boxed frame in a victorian and edwardian Ecclesall property we can usually spec it before we visit.