SPRING SAVINGS 10% off your glazing bars when you buy your polycarbonate from us! Use BAR10 at checkout.

PVC Capped Rafter Bar 10mm, 16mm & 25mm - White & Brown

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PVC Capped Rafter Bar. A strong, lightweight, snap down glazing bar which is very easy to fit. With a screw down aluminium base and a snap tight PVC cap, it is easy to fit and ideal for most applications. This snap down glazing bar is suitable for 10mm, 16mm and 25mm Multiwall Polycarbonate Sheets. To make an end bar simply clip in the Universal edge trim to balance up the outside of the bar and neatly cloak off the end of your roof. This high quality economical rafter supported bar is available in white or brown in a variety of lengths. Each bar comes with one end cap and extra end caps can be purchased seperately if you are cutting your bars down on site. 

April special offer!! Buy your polycarbonate from us and enjoy a 10% discount off your PVC capped glazing bars throughout April - apply the code BAR10 to your basket.

These bars are not suitable for glass. For rafter bars suitable for glass please see our 50 or 60mm aluminium capped screw down bars.

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Availability: In stock


PVC capped rafter bars are also known as snap down glazing bars, snap tight, knock down or push down bars due to the way they are installed. First thread the gaskets into the groove on either side of the aluminium base section - these often come in one piece and you simply tear this down the middle to get the two gaskets. The strong aluminium base bar is screwed down onto your rafter between the upstand. We recommend that these are at around 300 - 400mm centres and around 75mm from the ends. The sheets of polycarbonate are laid on top of the gaskets in the base bar separated by the upstand. The upstand has dedicated locking points for the various sheet thicknesses. When the PVC caps are knocked down the prongs on the caps lock into these points for a secure fix. As well as the two slide in gaskets in the base, the PVC top cap has co-extruded gaskets to give your roof a watertight seal. Each bar comes complete with an end cap (the 6m bar comes with two.) Extra end caps should you need them are available in the accessories section.

The bar is easily adapted from an intermediate bar (one that joins between two sheets) to an end bar. To create your end bar, simply leave the gasket out of the outside of your aluminium base bar and click in the prongs of a universal edge trim (PVC F section) in its place. This will balance up the outside of the bar and neatly cloak off the edge of your roof.


These snap down PVC capped Glazing bars are suitable for use with multi--wall polycarbonate sheets in 10mm, 16mm and 25mm thicknesses. Ideal for Lean Tos, canopies and carports, and for 16mm & 25mm polycarbonate conservatory roofs, these versatile bars are a very cost effective solution. Please note that if you are using glass for your project this bar is not suitable however, you can use our aluminium capped rafter bars which are designed for this.


These rafter bars are available in white or brown as standard, and with a wide range of lengths to choose from.

Sunwood Range

The Glazing Shop's full range of Sunwood Timber glazing products offer a complete set of parts for anyone building a timber conservatory roof.

The superior ‘Sunwood’ branded system offers powder coated aluminium and PVCu component parts to suit your design or specification. Available in two finishes, white or brown, this roofing solution gives a superior finish every time.

We offer a selection of components e.g. timber ridges, PVCu snap down or aluminium screw down bars, hip bars, and a range of crestings and finials in aluminum. Supported by a full range of trims and accessories, the ‘Sunwood’ system provides a professional finish to your roof every time.