Crookesmoor · S10
Stone mullion glazing in Crookesmoor, Sheffield
Around Crookesmoor Recreation Ground, Crookesmoor still carries a lot of original glazing — one-over-one sashes with stone lintels. Where those are 17th to 19th century, common in pennine and peak-fringe stone housing the failure mode is predictable: the reveal is deep, uneven and rarely plumb, so nothing off the shelf fits. Crookesmoor is not a conservation area, so the decision is purely technical rather than a consent question. A lot of this stock is let, so we work to void periods and can certify the install for licensing or EPC evidence. Coverage runs across Sheffield and the surrounding S1, S2, S3 districts, with Crookesmoor (S10) among the areas we survey most often.
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.
Cavity depth does more for acoustic performance than glass thickness, and we design for it first.
Thermal figures quoted are whole-window, not centre-pane, which is the honest way to state them.
Local conditions we design around
Fixing into a timber sub-frame or the internal lining keeps historic stonework untouched and keeps the work reversible.
Hand-cut mullions vary by tens of millimetres within one window, so batch-ordering to a nominal size is the classic failure on these buildings.
Crookesmoor stock is late Victorian back-to-back and through terraces and the prevailing glazing is one-over-one sashes with stone lintels, which is why stone mullion glazing comes up here so often.
We template each light individually because the mullion spacing varies within a single opening on hand-cut stonework.
Crookesmoor carries no conservation designation, so the specification is decided on performance alone.
What goes in, and why
| Window type | chamfered stone mullions dividing narrow vertical lights, deep-set in a thick stone wall (17th to 19th century, common in Pennine and Peak-fringe stone housing) |
|---|---|
| Underlying problem | the reveal is deep, uneven and rarely plumb, so nothing off the shelf fits |
| System we fit | hinged units templated to each light, set into the reveal face |
| Glass specification | Low-E as standard; these buildings are usually driven by cold and damp rather than noise |
| Measurement | we template each light individually because the mullion spacing varies within a single opening on hand-cut stonework |
| Heritage position | the stonework is normally the listed or protected element, so fixings go into the internal lining or a timber sub-frame, never the stone |
Local reference points
- Area
- Crookesmoor (S10)
- Town
- Sheffield, South Yorkshire
- Housing era
- late Victorian back-to-back and through terraces
- Typical windows
- one-over-one sashes with stone lintels
- Landmark
- Crookesmoor Recreation Ground
- Conservation area
- No
- Window style
- Stone Mullioned Windows
- Period
- 17th to 19th century, common in Pennine and Peak-fringe stone housing
Order of work
- Step 1
Send a photo of the window — with chamfered stone mullions dividing narrow vertical lights we can usually tell you the likely system before we visit.
- Step 2
Survey in Crookesmoor: we template each light individually because the mullion spacing varies within a single opening on hand-cut stonework.
- 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.
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
Can you fit secondary glazing without drilling the stone?
Yes — we fix into a timber sub-frame or the internal lining. Drilling historic stonework is not something we do.
The mullions are all slightly different widths. Is that a problem?
It is normal on hand-cut stone and it is why we template every light separately rather than ordering to a nominal size.
Will it help with damp in the reveals?
Usually. Reveal damp is condensation from cold surfaces meeting warm room air, and warming the reveal is what stops it.
Can you fit between tenancies?
Yes — a typical two-bed flat is a half-day fit, so a standard void period is more than enough.
Does this help with EPC or licensing?
Secondary glazing is recognised as a fabric improvement and we provide the product specification and install date for your evidence pack.
Pricing for multiple units — Windows
Give us the unit count and window schedule and we will quote the whole portfolio with a per-unit breakdown. Send a photo of the stone mullion glazing — with chamfered stone mullions dividing narrow vertical lights in a late victorian back-to-back and through terraces Crookesmoor property we can usually spec it before we visit.
Stone mullion glazing in Crookesmoor — the short version
The reveal is deep, uneven and rarely plumb, so nothing off the shelf fits. We fit hinged units templated to each light, set into the reveal face with Low-E as standard; these buildings are usually driven by cold and damp rather than noise, templated to your opening. Deep stone reveals get warm enough to stop the damp patching that appears at the reveal corners.