20x100mm Bridge Glazing Packers

20x100mm Bridge Glazing Packers are used to form a raised platform inside the glazing rebate before flat glazing packers are added on top.

In many glazing systems, especially uPVC frames, the base of the rebate includes drainage and ventilation routes. Placing a flat packer directly into the rebate can block these channels. A bridge packer helps overcome this by lifting the support point above the rebate base, creating a more suitable surface for setting and supporting the insulated glass unit.

The 20mm width makes BP20 bridge packers a common choice for glazing systems that use 20mm flat packers. With a 100mm length and 7mm bridge profile, they provide a practical support bed while helping maintain the designed water escape route within the frame.

These packers are available in 3mm, 4mm, 5mm, and 10mm thicknesses, giving installers different height options depending on the rebate depth, glass position, and required packing build-up.

Why installers choose 20x100mm Bridge Glazing Packers:

• Creates a raised base for flat glazing packers
• Helps prevent drainage channels from being blocked
• Useful for uPVC glazing rebates and drained frame systems
• Commonly paired with 20mm flat packers
• Helps support insulated glass units in the correct position
• Suitable for window, door, conservatory, and curtain walling work

These 20mm bridge packers are a practical everyday option for installers who need to support glass units while keeping the rebate drainage path clear and functional.

Material Note

The 3mm and 4mm thicknesses are made from polystyrene.

The 5mm and 10mm thicknesses are made from polypropylene.

What Each Thickness is Used For

3mm – Low Raised Support

Used where only a small bridge height is required inside the rebate.

Best for:

• Shallow glazing rebates
• Light support under flat packers
• Lower-profile drainage clearance
• Installations where minimal lift is needed

4mm – Standard Light Bridge Packing

A useful option where the rebate needs a little more height than 3mm.

Best for:

• General bridge packing work
• Creating a modest raised glazing bed
• Supporting 20mm flat packers
• Maintaining drainage space beneath the packer

5mm – Regular Raised Glazing Bed

A common choice for installers who need a firm support point with more clearance.

Best for:

• Everyday window and door glazing
• Supporting insulated glass units
• Creating a stable base for flat packers
• uPVC frames with drainage channels below the packing point

10mm – Deep Rebate Support

Used where a larger height build-up is required before the flat packer is added.

Best for:

• Deeper glazing rebates
• Larger height correction
• Raising the glass support point significantly
• Installations where thinner bridge packers are not enough