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Our Skyline Box range of glazing bars offer an economical roof glazing solution when compared with curtain walling roofing systems. The glazing bar's strength is provided by an internal box section. The glazing bar is weathered by a screw on pressure cap (PC1) with a choice of plain (PC2) or ornate (PC3) cosmetic outer snap-on cappings to conceal all fixing screws.



When used with high performance double glazing units with warm edge spacer bars and argon gas filling this system can achieve an overall U Value of 1.4W/ m²K to comply with Building Regulation Document L.


Our Skyline range of glazing bars offer an economical roof glazing solution incorporating slim sightlines. The glazing bar's strength is provided by an internal stalk (or fin) which is cut away at the top and bottom main fixing positions.
An internal snap-on ornate capping system (PC4) is also available if desired to fully conceal the internal stalk giving the appearance of a feature timber rafter.



When used with high performance double glazing units with warm edge spacer bars and argon gas filling this system can achieve an overall U Value of 1.4W/ m²K to comply with Building Regulation Document L.


Timber rafters (supplied by the builder or joinery sub-contractor) will create an appealing visual effect inside any home and are totally protected from the effects of weathering by our externally clad Rafterline Patent Glazing system.
Due to the pleasing aesthetics of aluminium and timber materials our Rafterline system is the most popular specifiers choice for domestic projects.



When used with double glazing and thermal breaks this system is easily capable of providing an overall U Value of 1.6W/ m²K to comply with Building Regulation Document L.


Our Traditional patent glazing system remains our customers most popular choice for use on unheated spaces such as Railway Stations, glazed canopies and covered ways where thermal properties are not a consideration.
This system has been installed on thousands of projects nationwide and is available with a choice of capping systems to suit your needs.
A truly great glazing system combined with economy and a proven track record. 30,000m² of this glazing system has been installed by us on many major railway stations throughout the UK in recent times.



This system is capable of accommodating solid or multi-wall polycarbonate sheets or double glazed units up to 28mm thick if used on unheated spaces or where compliance with Building Regulations Document L are not a consideration.


Our 'Heritage' Patent Glazing Bar range is truly unique amongst roof glazing systems; there are no alternative products available on the market which can match an original lead covered steel patent glazing bar which originates from the Victorian era. This range has been manufactured by us unaltered for over a century and is the perfect product for listed buildings and for use in the refurbishment of significant and historic buildings. This system is also still very popular for new build projects and should not to be overlooked on today's modern buildings where a unique character look is desired.

 


We offer a wide range of glazing systems which can achieve large spans to suit most designers requirements. We also provide an invaluable free structural calculation on all projects to ensure that we supply the correct strength glazing bar and the correct glass thickness to satisfy the relevant codes of practice.
The glazing system must always be fixed to OTHERS structural supports which require pitching to the roof slope to acheive air and weather-tightness.

 

 
  • Criteria
  • Design Notes
  • Skyline Box Span Chart
  • Skyline Span Chart
  • Traditional Span Chart
  • Heritage Span Chart
     

 

The span of roof glazing is classified as the downslope dimensions between the centre-lines of the fixing positions rather than the glazing bar length which is always longer than the span.

Achievable spans are dependent upon many factors, including:
1. Site altitude
2. Distance of site from the sea
3. Surrounding structures (Built up area or open countryside)
4. Glazing Type (Enclosed Roof or Open Canopy)
5. Height of glazing apex from ground level.
6. Pitch of glazing
7. Glazing bar centres
8. Roof shape
9. Local wind speeds
10. Local snow loads
11. Snow drift loadings based on adjacent structures
12. Weight of Glazed Infills
13. Maintenance Loadings
14. Additional loadings imposed on the glazing system
It is therefore clear to see that you should not order glazing bars without seeking our guidance first.

We are able to carry out a free job specific calculation on every project to ensure that the glazing bars we provide can be proved to be sufficiently robust enough to withstand all possible loadings that the system will be subjected to.

 

 
     

Maximum glazing bar spans stated in the charts contained on this page are based on a generic site close to sea level, 30km away from the sea, 5m height of glazing from ground level, a duo-pitched roof shape, a 15°roof pitch and glazing bars being spaced at 600mm centres.

Single glazed data is based on a 6mm thick glass infill whereas double glazed data is based on 2x6mm thick glass infills. Any deviation from these variables can significantly alter the maximum achievable span so please do contact us for expert guidance of this subject.

On deep glazing (slope lengths over 3200mm) a structural intermediate purlin (by others) is usually introduced into the design at the mid span position to enable a lighter glazing bar section to be used. Because glass over this length is not available in a single peice as standard, a convenient and common place to join the glass is over the intermediate purlin.

Our aluminium glazing bar ranges are available in lengths up to 6000mm-7500mm but will require intermediate support at these lengths.

  Tiered Heritage Patent Glazing Tiered Detail and Image
     

please note that due to the manufacturing process of our Heritage Lead Clothed Steel glazing bars, we cannot supply this product in lengths exceeding 3350mm (11'-0") regardless of whether intermediate supports are provided. If a Heriatge glazing bar is required to exceed this length then the design must incorporate a break/tier to overcome this limitation (see above).