Whirlow · S11
Sash window glazing in Whirlow, Sheffield
We work on sash window glazing across Sheffield, and Whirlow 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. Our vans are in Sheffield most weeks; Whirlow is roughly 5 miles out from the centre, comfortably inside the South Yorkshire coverage area.
Local conditions we design around
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.
Whirlow stock is Arts and Crafts and stone detached and the prevailing glazing is stone-mullioned casements, 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.
Whirlow 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.
Local reference points
- Area
- Whirlow (S11)
- Town
- Sheffield, South Yorkshire
- Housing era
- Arts and Crafts and stone detached
- Typical windows
- stone-mullioned casements
- Landmark
- Whirlow Hall Farm
- Conservation area
- Yes — room-side install standard
- Window style
- Sash Windows
- Period
- Georgian, Victorian and Edwardian, roughly 1750–1910
From enquiry to install
- 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 Whirlow: 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.
The technical answer
| 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 |
Sash window glazing in nearby areas
Every opening is templated on site — we do not price secondary glazing by the square metre.
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.
Glass specification is decided after the survey, not before — the same room can need two different thicknesses.
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.
Recent installs nearby
Nether Edge Grade II sash retrofit
Six original box sashes fitted with balanced vertical secondary sliders — full listed-building consent secured in six weeks.
Ecclesall Road bay-window sound retrofit
Three-panel horizontal sliders across a 3.2 m Edwardian bay — Rw measured at 47 dB post-install.
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.
Want the numbers before you commit — Windows
We will send indicative pricing per opening before any visit is booked. Send a photo of the sash window glazing — with two vertically sliding sashes running in a boxed frame in a arts and crafts and stone detached Whirlow property we can usually spec it before we visit.
Sash window glazing in Whirlow — 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.