Gleadless · Sash Window Homes
Secondary Glazing for Sash Window Homes Properties in Gleadless, Sheffield
Gleadless grew as hillside estates with long valley views, which is why sash window homes properties are so well represented here. They share one weakness: vertical box sashes of every era that were never specified for modern noise or heating standards. Most enquiries here come from owner-occupiers doing one or two rooms at a time, so we price per opening rather than per house. Gleadless is about 3.5 miles from central Sheffield, so a survey here is a short run for our team off the M1 J33.
Listed-building drawings and specifications are prepared free with the quote where consent is needed.
Every opening is templated on site — we do not price secondary glazing by the square metre.
Glass specification is decided after the survey, not before — the same room can need two different thicknesses.
Local detail that changes the job
In a mid-terrace, the acoustic gain is typically 35–45 dB — enough to sleep with the window latch just cracked.
Sash reveals are rarely square, so every opening is templated on both diagonals before manufacture.
Sash Window Homes properties date from the Georgian to Edwardian, and the original glazing is vertical box sashes of every era.
Sash rattle, draughts and irreplaceable glass — that is what we are asked to solve in Gleadless.
Local conditions matter: exposed-elevation draughts and single-glazed landing windows.
Gleadless sits 3.5 miles from central Sheffield, near Gleadless Valley, so a survey visit is usually within the week.
The specification we recommend
| Property type | Sash Window Homes (Georgian to Edwardian) |
|---|---|
| Original glazing | vertical box sashes of every era |
| Dominant problem | sash rattle, draughts and irreplaceable glass |
| Local window stock | steel casements and PVCu replacements |
| Consent position | No conservation designation recorded for this area, so the choice is technical rather than a consent question. |
Local reference points
- Area
- Gleadless (S12)
- Town
- Sheffield, South Yorkshire
- Housing era
- 1930s and post-war semis
- Typical windows
- steel casements and PVCu replacements
- Landmark
- Gleadless Valley
- Conservation area
- No
- Property type
- Sash Window Homes
- Build era
- Georgian to Edwardian
What happens next
- Step 1
Tell us how many openings the property has — sash window homes layouts are consistent enough that we can price closely from a description.
- Step 2
Survey and template every opening, including any that have already been altered by a previous owner.
- Step 3
Manufacture, typically two to three weeks.
- Step 4
Install room-side in a single day for most whole-house jobs in Gleadless.
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.
Common questions
How is the quote calculated?
We survey and template every opening on site, then quote in writing per opening — no per-square-metre pricing that hides oversize charges.
Is there a warranty?
Yes — 10 years on the manufacture and installation, and a manufacturer's warranty on the glass units.
Can I still open the original window?
Yes — every sliding, hinged and lift-out unit is designed to move clear so you can operate the primary window behind it.
Can Low-E glass be combined with acoustic laminated?
Yes — most heavy specifications combine both, so you get acoustic gain and thermal gain in the same install.
What U-value can secondary glazing achieve?
As low as 1.868 W/m²K with Low-E soft-coat glass and a 100 mm cavity — comfortably meeting current retrofit building-regs targets.
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.
Start with one room
Send the opening sizes for the worst room and we will price that first — extending later costs no more. Sash Window Homes layouts in Gleadless are consistent enough that we can price closely from a room count.
Sash Window Homes in Gleadless — the short version
Sash rattle, draughts and irreplaceable glass is the recurring issue in sash window homes stock, and in Gleadless it arrives alongside exposed-elevation draughts and single-glazed landing windows. A room-side secondary system handles both without touching the original windows.