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Application

To be used to the external facade of a patent glazing system on grade 1 and grade 2 listed buildings and historic buildings, and can accommodate the following:


  • Replacement, refurbishment and replacement projects.
  • New build projects where a traditional design is required.
  • Glass roofing, including self-supporting hipped rooflights, lanterns and polygonal shaped rooflights.
  • Double and triple glazed applications.
  • Single glazing applications.
  • Lean-to and duo-pitched designs.


Typical applications include:


  • historic buildings
  • listed buildings
  • architecturally or culturally important buildings
  • markets
  • residential premises
  • social amenities including churches and community buildings


Description

For listed or historic buildings, the Heritage patent glazing system merits serious consideration.  


The design of the Heritage patent glazing bar originates from the late Victorian period and remains substantially unaltered to this day and the Heritage system, the original Standard Patent Glazing system is the only patent glazing system still available on the market that features the original lead cover surrounding its hermetically sealed patent glazing bars. 


If your objectives include historic building conservation, or your project involves a listed, prestigious or architecturally important building and you want to help protect its special architectural and historic interest during its replacement, refurbishment or upgrading, then the Heritage system is unmatched.  And because it’s unique, it’s also very suitable for new build projects where aesthetic design values are uppermost in the architect’s mind, being part of an architectural toolkit which can play a very important role in helping to create a unique statement building firmly rooted in the traditional architectural vernacular.


The Heritage patent glazing bar consists of a galvanised rolled mild steel core which is inserted into a seamless lead extrusion covering that incorporates a twin wing weathering system and glass seatings. The ends of the lead covers are then soldered to give a hermetic seal. Cast brass fixing plates and glass stop are screwed on to produce the finished glazing bar. 


Whilst the system remains substantially unaltered compared to its original incarnation, certain components and our manufacturing techniques and equipment have been improved over time to ensure that the system continues to meet quality expectations and continues to be compliant with relevant legislation and standards. 


Heritage Patent Glazing bars meet all of the requirements of British Standard BS5516: 2004 Code of Practice for the design and installation of vertical and sloping patent glazing.  


The average Heritage Patent Glazing bar typically weighs more than twice as much as an aluminium SkyLine Box Patent Glazing bar, but typically, Heritage Patent Glazing bars costs are similar to the polyester powder coated SPG7 glazing bar section from our SkyLine Box Patent Glazing system.  


Features and benefits:

  • Designed to produce a traditional Victorian style.
  • The glazing bar consists of a galvanized, rolled carbon steel core which is inserted into a seamless lead extrusion covering, incorporating a twin wing weathering system and glass seatings.
  • The ends of the lead covers are soldered to give a hermetic seal.
  • Original design cast brass fixing plates and glass stop are screwed on to produce the finished glazing bar.
  • Can accommodate single and double glazing, and passes Advisory Committee for Roofwork (ACR[M]) and Centre for Window and Cladding Technology (CWCT) non-fragility tests in both single and double glazed formats.
  • No capping is required.
  • Can be combined with opening vents to offer a complete glazing solution.
  • Manufactured in accordance with BS 5516: 2004 Code of Practice for the design and installation of vertical and sloping patent glazing.

General information

Color

Other

Finish

Natural

Guidance for specification option:

Self-finished (lead covered) glazing bars.

Powder-coated

Guidance for specification option:

Polyester powder-coated to BS 6496.

Material

Steel

Guidance for specification option:

Rolled carbon steel inner cores with a minimum tensile strength of 355 N/mm²

Glass

Lead

Shape

Other

Length

Bespoke

Width

Bespoke

Height

Bespoke

Warranty description

Five year

Uniclass

Ss_30_40_32_75 Sloping patent glazing systemsPrimary

CAWS

H10/10 Patent glazing

H10/115 Patent glazing

Product range

Patent Glazing Systems

Specification data - Sloping patent glazing systems

System performance

General system performance of rooflights, roof windows and roof ventilators

Glazing bars

LC5 SG.

Guidance for specification option:

  • Depth: 45 mm.
  • Single glazing: 1290–3220 mm.
  • Canopy glazing: 1380–2530 mm.


Not available for use with double glazing.

LC7 DG.

Guidance for specification option:

  • Depth: 53 mm.
  • Double glazing: 1350–3270 mm.


Not available for use with single or canopy glazing.

LC7 SG.

Guidance for specification option:

  • Depth: 53 mm.
  • Single glazing: 1430–3570 mm.
  • Canopy glazing: 1540–2800 mm.


Not available for use with double glazing.

Manufacturer guidance

  • Consult manufacturer before specifying a particular glazing bar.
  • Please note that the lower span values are calculated using the most extreme environmental loadings, whereas the higher span values are based on the least extreme.
  • The manufacturer requests a site postal code to enable them to calculate the correct glazing bar type for every project.
  • The glazing bar spans above are based on using 6 mm thick glass for the double glazed, single glazed and canopy types.
  • Spans are dependent upon the site location and exposure rating, site altitude, distance from the sea, height of glazing from ground level, shape of the roof, pitch of glazing, glazing bar centres, glass weight, wind speeds, snow load, dead load and maintenance loads.


Glazing bar spacing:

  • Approximately 600 mm centres.

Glazing

-

Manufacturer guidance

Insert requirements e.g. clear laminated, heat soaked toughened, etc. Consult manufacturer's literature for information.

  • Double: 30 mm thickness.
  • Single: 6–9 mm thickness. Insert requirement.
  • Triple: 30 mm thickness.


An 18 mm Argon gas filled cavity with warm edge spacer bars is supplied for double and triple glazing.

Fasteners

Brass fixing plates and glass stop are screwed on.

System accessories

Not required.

Dress only lead flashings.

Guidance for specification option:

To perimeter positions (lead flashings measured elsewhere).

Pre-formed sheet aluminium flashings.

Guidance for specification option:

To perimeter positions.

Slope

Film thickness (minimum)

40 µm.

Roof Window

Lead covered steel roof window units.

Filler

Manufacturer's standard.

Operation

Not applicable.

Electric control - chain actuator, 24 V.

Electric control - chain actuator, 230 V.

Electric control - linear actuator, 24 V.

Electric control - linear actuator, 230 V.

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Top

Suitably pitched steel rails.

Suitably pitched timber rails.

Manufacturer guidance

Supporting structure.

Intermediate

Not required.

Suitably pitched steel rails.

Suitably pitched timber rails.

Manufacturer guidance

Supporting structure.

Bottom

Suitably pitched steel rails.

Suitably pitched timber rails.

Manufacturer guidance

Supporting structure.

Type

Not required.

Bottom hung, thermally broken.

Guidance for specification option:

Not available for single glazing.

Side hung, thermally broken.

Top hung, thermally broken.

Manufacturer guidance

Opening vents.

Quantity

Guidance for specification option:

1–20; consult manufacturer and insert requirements.

If opening vents are not required, insert N/A.

Manufacturer guidance

Opening vents.

Controls

Not applicable/ not required.

Crank handle.

Guidance for specification option:

For use with screwjack gear.

Standard open/ close wall mounted switch.

Guidance for specification option:

For electric actuators.

Wall mounted thermostatic control panel with rain sensor.

Guidance for specification option:

For electric actuators.

Manufacturer guidance

Opening vents.

Trim

Lead flashings.

Aluminium flashings.

Manufacturer guidance

External trim.

(Internal trim - manufacturers standard).

Sustainability data

Contains Red List materials

Yes

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Recyclability

Recyclable

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

100 %

Literature

Opening Vents Brochure

Opening Vents Brochure

Heritage Patent Glazing Brochure

Heritage Patent Glazing Brochure

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