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Secco OS2 Windows - Slimline Heritage Windows

Verified by manufacturer 4 days ago

OS2 65 vertical pivot window

BM Architectural Variant:

Slimline heritage windows offering vintage appeal with modern thermal, acoustic and security performance.

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0114 254 3226 Website

Application

Heritage home renovations and listed properties: Perfect for restoring windows in Victorian, Edwardian, or Georgian residences, where the slim steel profiles mimic original ironwork to satisfy conservation authorities, as seen in projects like the Gallerie dell’Accademia in Venice.

 

Period domestic extensions or conservatories: Suited for adding or replacing glazing in traditional family homes, creating light-filled indoor-outdoor spaces like winter gardens or orangery links. The customizable brass or Corten finishes evoke artisanal craftsmanship, while the quiet, barrier-free operation supports everyday use in characterful settings.

 

Boutique hospitality in historic districts: In small luxury guesthouses, cafes, or boutique hotels within conservation areas such as the Cotswolds, the OS2 system frames views without overwhelming delicate architecture. Its corrosion-resistant materials and high security make it durable for public-facing heritage sites, blending subtle elegance with practical performance.

 

Rural or coastal period retreats: In restored farmhouses, cottages, or seaside villas, the robust yet refined profiles withstand environmental exposure, with oxidised Corten options adding a weathered patina that complements traditional stone or brickwork. It's especially valuable for large openings in exposed locations, providing superior weatherproofing and insulation for year-round usability.

Description

Slimline heritage windows offering vintage appeal with modern thermal, acoustic and security performance.

  • OS2 65: for windows with a glass thickness 24–35 mm
  • OS2 75: for windows with a glass thickness 35–46 mm.
  • OS2 85: for windows with a glass thickness 46–54 mm.

Features and benefits:

  • Matching range of doors available for design continuity, specified separately.
  • Features slender profiles, slim sight lines and clean, sharp edges.
  • Enhances the look of a wide range of applications, from architecturally ambitious new-build construction to period property renovations.
  • In addition to enhancing energy efficiency, these systems can also contribute to the conservation of the local built environment.
  • Suitable for renovating older buildings, they are more sympathetic to the character, charm and architectural style of heritage or listed properties than more modern glazing options.  
  • Maximizes the natural light entering a property and the feeling of space, helping to create safer, more comfortable and inspiring environments.

General information

Color

Silver

Brown

Clear

Grey

Other

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Finish

Galvanized

Weathered

Satin

Polished

Burnished

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Material

Steel

Stainless steel

Carbon steel

Cor-Ten

Brass

Shape

Rectangle

Square

Other

Length

65 mm

75 mm

85 mm

Width

Bespoke

Height

Bespoke

Uniclass

Pr_30_59_98_83 Steel window unitsPrimary

CAWS

L10/33 Proprietary windows

L10/390 Proprietary windows

L10/20 Steel windows

L10/310 Steel windows

Specification data - Steel window units

Classification data

Standard

To EN 14351-1:2016.

Dimensions and configurations

Guidance for specification option:

Consult manufacturer for options and insert requirements; configuration options will vary depending on variant required.

Options: Curved head, Gothic Arch, Curved on plan, Raked Head.

Manufacturer guidance

Include drawing and/ or schedule reference as required.

Maximum visible frame width of 62 mm (external - central node(s); lateral nodes are 47 or 27 mm); dimensions depend on configuration required.

Product performance

-

Weather performance

-

Air permeability

To EN 12207, Class 4.

Manufacturer guidance

Maximum certified performance.

Watertightness

To EN 12208, Class 6A.

Manufacturer guidance

Maximum certified performance.

Resistance to wind load

To EN 12210, Class C5.

Manufacturer guidance

Maximum certified performance.

Safety

-

Security level

Not applicable.

Environmental

-

Acoustic performance rating

Manufacturer's standard.

Manufacturer guidance

Consult manufacturer for details.

Thermal

-

Whole window U-value

Manufacturer's standard.

Guidance for specification option:

Consult manufacturer for details.

Frame

-

Profile

Guidance for specification option:

Consult manufacturer for options and insert requirements.

Manufacturer guidance

65 mm deep.

Material

As Colour.

Manufacturer guidance

Also available in brass, consult manufacturer for details.

Finish as delivered

-

Coating

Not applicable.

Guidance for specification option:

Corten steel and stainless steel frames only.

Powder coating.

Guidance for specification option:

Galvanized steel frames only.

Liquid coating.

Guidance for specification option:

Galvanized steel frames only.

Colour

Satin Brass.
Patinated Brass (Architectural Bronze).
Corten.
Stainless Steel.
Burnished Stainless Steel (darkened Stainless Steel).
Painted galvanized steel - Black RAL 9005 Matt.
Painted galvanized steel - Black RAL 9005 Semi-gloss.
Painted galvanized steel - Graphite Grey RAL 7024 Matt.
Painted galvanized steel - Graphite Grey RAL 7024 Semi-gloss.
Painted galvanized steel - Anthracite Grey RAL 7016 Matt.
Painted galvanized steel - Anthracite Grey RAL 7016 Semi-gloss.
Painted galvanized steel - Cream White RAL 9001.
Painted galvanized steel - Traffic White RAL 9016.
Painted galvanized steel - Pure White RAL 9010.
Painted galvanized steel - RAL colour.

Guidance for specification option:

Consult manufacturer and insert colour requirements.

Specialist colours available on request.

Film thickness (minimum)

Manufacturer's standard where applicable.

Ventilator

Guidance for specification option:

Consult manufacturer for options and insert requirements, or omit.

Glazing or infill

-

Requirements

Guidance for specification option:

Insert requirements, 24–35 mm.

Hardware

Guidance for specification option:

Consult manufacturer for options and insert requirements.

They are available in the same range of finishes as the profiles to ensure design continuity.

Operation

Manual.

Fixing features

Manufacturer's standard.

Beading

Squared.
Triangular.
Thin.
Gothic.
Bevelled.
Recessed.

Manufacturer guidance

Consult manufacturer for details.

Sustainability data

Material

Steel
Stainless steel
Carbon steel
Cor-Ten
Brass

Literature

Secco OS2 Range

Secco OS2 Range

Secco Main Catalogue

Secco Main Catalogue

Secco Accessories

Secco Accessories