P227 Glazing Bar

An aluminium structural glazing bar into which multiwall polycarbonate, solid polycarbonate or glass can be fitted in thicknesses ranging from 4mm to 25mm. When glazing with multiwall polycarbonate the P227 glazing bar is capable of spanning up to 1.4m between fixing points. For applications longer than 1.4m span, an intermediate cross purlin should be installed to create a further fixing point, alternatively use the Twinfix P286, P280, P288 or P600 glazing bars.

The P227 can be supplied either as a pre-pack complete with the aluminium base bar and bar cap, both with gasket fitted and an end plate or as loose individual items. The P227 can also be supplied as a hipped glazing bar with the bar cap being 70mm wide and more angled than the standard version.

Standard Glazing Bar

Colour:Mill Finish, White or Brown
Length:3m and 4m (and 6m as individual components), white also available in 2.5m and 3.5m lengths, other lengths may also be available.

The P227 glazing bar consists of an aluminium base bar (ref.227) and an aluminium glazing bar cap (ref.228), gaskets and a screw-fit end plate (ref.228EP).

The base bar is fitted to the ridge and eaves support, the glazing sheet sits on the aluminium base bar and the cap is drilled at intervals no more than 300mm apart. Screws are then fitted through the cap into the central stalk of the base bar. The length of screw differs with each thickness of glazing sheet. A screw cover cap is needed to cover and protect the head of the screw.

The P227 glazing bar is supplied as a pre-pack in 3m and 4m lengths with gaskets installed, and as loose items in 6m.

Hip Glazing Bar

Colour:Mill Finish, White or Brown
Length:3m and 4m (and 6m as non-standard)

To make the bar suitable for a hipped application, the glazing bar cap is changed for a wider more angled cap and re-named as P227H.

The P227H glazing bar is supplied as a pre-pack in 3m and 4m lengths and as loose items in 6m. The 3m and 4m pre-pack consists of the aluminium glazing bar cap, the base bar, bubble gasket pressed in the full length of the aluminium cap and base down either side and a wide push fit plastic end plate.

Colour Options

Mill finish as well as polyester powder coated white (RAL9910 satin) and brown (RAL8040 satin) are available as standard. We can also supply the 228 cap and 227 base 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
  • Rooflights
  • Conservatories
  • Cross Purlin Roofing
  • Swimming Pool Covers
  • Car Ports
  • Canopies
  • Garden Centre Roofing
  • Porches

Glazing with Glass

The P227 glazing bar is suitable for use with glass. Twinfix cannot advise as to the spanning capability of the system or at what centres the glazing bars should be placed. We recommend that a mechanically fixed end plate similar to our SB-MEP end plate be fitted at the foot of each bar to stop the glass from slipping.

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 226F226 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.