Flat Glazing Packers

Flat Glazing Packers – Trade-Grade Plastic Shims for Glazing Installations

Flat glazing packers are rigid plastic shims used to support, space, and level insulated glass units during window, door, conservatory, and curtain walling installations. They help installers position sealed units accurately within the frame and create consistent support points during glazing work.

Our flat glazing packer range includes popular direct-order sizes such as 9mm, 20mm, 24mm, and 28mm, along with extended-width flat packers available through our quote service. Choose from narrow packers for slim glazing channels, standard-width packers for everyday window and door glazing, and wider packers where a broader support surface is required beneath the unit.

Popular stocked products can be ordered online for direct dispatch. Extended sizes and specialist flat packers can be added to a quote request, and we’ll confirm price, availability, and lead time before you order.

🚚 Next-Day Delivery | 📏 Consistent Sizing | 🧱 Trade-Grade | 📦 Bulk Pricing | 🔁 Easy Re-Order

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These products can be purchased online for direct dispatch.

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20mm Flat Glazing Packers

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24mm Flat Glazing Packers

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28mm Flat Glazing Packer

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9mm Flat Glazing Packers

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Request a Quote (4-Hour* Quote Turnaround, 3-Day Delivery)

*Most quotes are turned around in 4 hours during normal working hours, Monday to Friday.

Choosing the Right Flat Glazing Packer

Flat glazing packers are used to support, level, and position insulated glass units during window, door, conservatory, and curtain walling installations. They provide consistent, non-compressible spacing and help keep the glass unit correctly seated within the frame.

For narrow glazing channels, choose slimmer flat packers such as 9mm, 10mm, 12mm, or 15mm. For everyday glazing work, 20mm, 24mm, and 28mm flat packers are commonly used. For wider rebates or larger units, 30mm and wider flat packers provide a broader bearing surface beneath the glass.

Select the thickness that gives the correct glass height without over-compressing gaskets or seals. Thinner packers are useful for fine adjustment, while thicker packers provide more lift and stronger spacing support. Direct-order sizes are available online, and extended flat packer sizes can be requested through our quote service.

Flat Glazing Packers – FAQs

What are flat glazing packers used for?

Flat glazing packers are used to support, level, and space insulated glass units inside window, door, conservatory, and curtain walling frames.

Which flat glazing packer width should I choose?

Choose the width that suits the glazing channel and support area required. Narrow packers are useful in tight channels, while wider packers provide a broader bearing surface under the glass unit.

Which thickness should I choose?

Use the thickness that gives the correct glass position without stressing the gasket, seal, or frame. Many common glazing jobs use 1mm to 6mm packers, while some specialist sizes may include thicker options.

When will my order ship?

Direct-order products are dispatched according to the delivery option selected at checkout. Quote-only products may have different lead times, which we will confirm before you place the order.

Need Help Choosing?

Email our trade support team at support@glazingpacker.co.uk — we’ll help you pick the right packer set for your job.