P288 Glazing Bar

An aluminium structural glazing bar into which multiwall polycarbonate, solid polycarbonate or glass can be fitted. When glazing with multiwall polycarbonate the P288 glazing bar is capable of spanning up to 4m between fixing points. For applications longer than 4m span, an intermediate cross purlin should be installed to create a further fixing point, in which case the P280 or P284 glazing bar may prove more cost effective and more suitable.

The P288 can be supplied either as a pre-pack complete with the aluminium base bar and bar cap, both with gasket fitted or as loose individual items.

Although the P288 is suitable for 25mm polycarbonate or 24mm double glazed units only, the glazing bar can be adapted very simply to accommodate all thicknesses from 6mm to 24mm by inserting a Gasket Carrier into the 280 cap. This is known as P288GC. If glazing with 16mm polycarbonate, insert 280HG hip gasket rather than use the gasket carrier.

Standard Glazing Bar

Colour:Mill Finish, White* or Brown*
Length:3m, 4m and 6m
Span with glass:2.6m at 600 centres
*Denotes coloured to order, would be subject to a longer lead time

The P288 glazing bar consists of an aluminium base bar and a shaped aluminium glazing bar cap and 280G gasket. A mechanical end plate (SB-MEP) will be required.

The base bar is fitted to the ridge and eaves support, the glazing sheet sits on the gasket and the cap is drilled at intervals no more than 350mm apart. Screws are then fitted through the cap into the central stalk of the base bar.

For applications with good ventilation i.e. with open sides, the glazing bar would be supplied without an underclad.

For applications without good ventilation i.e. enclosed sides, it is recommended that a uPVC thermal underclad be supplied to clip onto the base bar to minimise the risk of condensation forming. This is then known as P288U.

The P288 and P288U glazing bars are supplied as loose items or as a pre-pack in 4m lengths.

P288GC Glazing Bar

Colour:Mill Finish, White* or Brown*
Length:3m and 4m
Span with glass:2.6m at 600mm centres
*Denotes coloured to order, would be subject to a longer lead time

When the P288 glazing glazing bar was introduced, it was suitable for 25mm polycarbonate and 24mm double glazed units only. This was a negative as much of the glass long span business we were being asked to quote on was for thicknesses of less than 24mm.

We have now introduced what we call a gasket carrier (288GC) which means the P288 is suitable for all thicknesses of glazing between 6mm and 25mm.

The gasket carrier whose is a length of U shaped aluminium, it slots into the two gasket ports of the 280 glazing bar cap and has 280G gasket fitted into it. This lowers the 280 cap thus enabling thicknesses of 6mm upwards to be specified.

End Plates

The P288 and P288GC glazing bars should always be used with a mechanical end plate (SB-MEP), the normal 280EP plastic end plate does not fit the glazing bar.

Colour Options

Mill finish available as standard, polyester powder coated white (RAL9910 satin) and brown (RAL8040 satin) are coloured to order. We can also supply the aluminium painted to a specific RAL colour although this may be subject to a minimum quantity requirement and surcharge.

Mill FinishRAL 9910
White (satin)
RAL 8040
Brown (satin)
Please note: The colours shown are not 100% accurate and are for guidance only


  • Medium Span Roofing
  • Long Span Roofing
  • School Play Areas
  • Cross Purlin Roofing
  • Swimming Pool Covers
  • Canopies
  • Rooflights

Glazing with Glass

The P288 glazing bar is suitable for use with glass. When fixed at 600mm centres, the P288 glazing bar will span 2.6m between fixing points.

Complementary Fixing Accessories

Side TrimU Profile
Ref 272 - 10mm
Ref 273 - 16mm
Ref 275 - 25mm
Side TrimRef 252 - 10mm
Ref 253 - 16mm
Ref 255 - 25mm
U Profile
Eaves FillerFixing Buttons (white)Fixing Buttons (brown)
Ref 285F285 Eaves FillerRef 272 - 10mm
Ref 273 - 16mm
Ref 275 - 25mm
Ref 252 - 10mm
Ref 253 - 16mm
Ref 255 - 25mm
Anti-dust/Breather TapeButyl Flashing
Ref FT or PBT 10
Ref FT or PBT 16
Ref FT or PBT 25
Anti-dust/Breather Tape200/20 White
200/20 Lead
Butyl Flashing

Help & Advice

If you have a project in mind or would like help or advice on any of our products or services, please either ring us on 01925 811311, email us at enquiries@twinfix.co.uk or get in touch via the enquiry form on our Contact Us page.


Related FAQs

1. Can I use your glazing bars to install glass?
You can use all of our bars to install glass, with the exception of the P600 and P700 Snap-fit systems. However, please note that you will need to use a Mechanical End Plate to ensure the glass is held securely in place; the plastic end plates that are supplied with the bars are only suitable for use with multiwall polycarbonate.