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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.


All Patent Glazing systems must be installed with suitable safety glass. These are either Toughened, Laminated, Wired glasses or a combination of these for double and triple glazed systems.
The information below describes each of the most popular types in detail to enable the specifier to select the most appropriate type for their roof glazing projects.
Double and triple glazed units are usually supplied in fully toughened formats or with toughened glass to the outer panes and laminated glass to the inner panes to prevent glass from falling to the floor level in the event of breakages.


  • 1. Toughened Glass
  • 2. Laminated Glass
  • 3. Wired Glass
  1. Toughened Safety Glass - (Safety Class Rating 'A')
    Toughened safety glass (sometimes called tempered glass) is produced by heating annealed glass to approximately 620ºC, at which point it begins to soften. The surfaces of this heated glass are then cooled rapidly. The technique creates a state of high compression in the outer surfaces of the glass and, as a result, although most other characteristics remain unchanged, the bending strength is increased by a factor of up to five times that of annealed glass. When broken, the toughened glass fractures into small pieces (called dice). As these particles do not have the sharp edges and dagger points of broken annealed glass, it is generally regarded as a safety glass. While these dice may cause minor cuts, it is very difficult to cause a severe injury with them, provided the fragments are small enough. Toughened safety glass must be cut to size and have any other processing, such as edge polishing or hole drilling, completed before toughening, because attempts to “work” the glass after toughening will cause it to shatter. All Toughened Glass has the highest Safety Rating available, which is Class A to British Standard 6206.  

  2. Laminated Safety Glass - (Safety Class Rating 'A' or 'B')  
    Laminated glass consists of one or more panes of glass attached to and separated from each other by means of interlayer materials. Laminated glass is usually made from annealed glass, although it can also be manufactured using toughened, heat strengthened or wired glass. It is no stronger than the glass it is made from and cracks as easily. However, when laminated glass breaks, the glass fragments tend to adhere to the interlayer material. Although the glass itself may be annealed glass, on breaking, any sharp cutting edges are not generally exposed. The performance of the glass depends very much on the type of interlayer, and there are many different types. The most common interlayer is PVB (polyvinylbutyral) sheet, which usually sticks to the glass very well and produces a uniform thickness, high energy absorbing interlayer. 6.4mm thick Laminated Glass obtains a Class B safety rating to BS 6206 6.8mm thick Laminated Glass obtains a Class A safety rating to BS 6206 All Laminated Glass with a PVB interlayer at least 0.8mm thick obtain a Class A safety rating to BS 6206  
  3. Wired Safety Glass - (Safety Class Rating 'C')*  
  This is a product which has been regarded as a safety glass for many, many years. The wires in wired glass tend to hold the glass together when it is cracked. They perform this function admirably when used in roof glazing and, most particularly, in providing fire resistance.
* The Cast/textured type (shown opposite) supplied by Pilkington Glass has thinner wires than the polished/clear type and therefore no longer carries a safety rating to BS 6206. The Polished/Clear type is supplied by Pilkington Glass with normal and thicker wires so the latter product provides a safety Class C rating to BS 6206.