Pre-launch preview. Values marked Indicative are being verified against test certificates.
Facades & roof glazing

Glass walls and glass roofs, detailed into the building.

Curtain walling for glazed gables, stair towers and double-height rooms. Roof lanterns and rooflights that bring daylight into deep London plans. Shopfronts for mixed-use schemes. Most of the risk sits in the junctions with the structure, the roof and the walls, so we draw those with you before we make anything.

  • Curtain wallingstick system, to EN 13830
  • Materialsaluminium, timber-aluminium
  • Rooflight U-value2.2 W/m²K or better
  • Interfacesdrawn before production
  • Aluminium
  • Timber-aluminium

Curtain walling

Mullions from c. 50 mm · capped or structurally glazed · opening vents and doors Indicative

A grid of mullions and transoms carrying large panes, hung off the structure rather than sitting in a wall opening. We use stick systems, built on site, which suit houses and small schemes: glazed gables, stair towers, double-height living rooms and glazed links between old and new.

  • Capped, ridge-capped or silicone-jointed faces
  • Integrated doors, top-hung and parallel-opening vents
  • Timber-aluminium option with timber mullions inside
  • Aluminium
  • Timber

Roof lanterns

Up to c. 3 × 6 m · slim aluminium rafters · solar control glass Indicative

The classic answer to a dark middle room in a terrace extension. A pitched glass lantern on a flat roof brings in far more daylight than a wall window of the same area. We size the glass for solar control so the kitchen doesn’t overheat in summer.

  • Self-cleaning and solar control coatings
  • Insulated upstand, at least 150 mm above the roof finish
  • Timber lanterns for traditional orangeries
  • Aluminium

Flat and walk-on rooflights

Fixed · opening · roof access hatches · walk-on

Frameless-look glass over a kitchen, an electrically opening rooflight for night cooling, a sliding hatch onto a roof terrace, or walk-on glass over a basement lightwell. Every one has a laminated inner pane, so broken glass stays in place.

  • Rain sensors on opening rooflights
  • Anti-slip walk-on glass designed for its load
  • Hidden frames from inside
  • Aluminium

Shopfronts and entrances

Ground-floor commercial units · communal entrances

Glazed shopfronts and communal entrance screens for mixed-use and residential schemes. For developers we can supply them in the same package as the flat windows and doors above, with one programme and one point of contact.

Rules

What we check before we draw

Facades and roof glazing touch more of the building than any window. These are the points we settle at Stage 4, not on site.

Part L

Energy

New rooflights in existing homes need a U-value of 2.2 W/m²K or better. In extensions, large glazed areas count towards the 25% allowance, or need a whole-dwelling calculation.

Part O

Overheating

New homes must show they won’t overheat. Solar control glass, g-values and opening rooflights all feed into that assessment, and we provide the figures.

Part K

Safety

Safety glass in critical locations, guarding where glazing protects a drop, and laminated inner panes on all roof glazing.

Structure

Loads and movement

Curtain walling is fixed back to the frame. We agree brackets, deflection limits and movement joints with your engineer before production.

Testing

Tested systems only

Curtain walling to EN 13830, with air, water and wind-load classes from the system’s test reports. Installation follows CWCT guidance.

Send us the sections and elevations. We’ll mark up the interfaces in five working days.

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