Stormguard Proline AM5Ex Subsill – Outward Door Threshold – Matt Silver

The Stormguard Proline AM5Ex Subsill Outward Door Threshold in Matt Silver is a high-performance solution. It is designed for doors with PVC, wood, or composite subsills. Available in 2000mm and 3000mm sizes, this threshold delivers robust sealing and thermal efficiency in a clean, modern Matt Silver finish.

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The AM5Ex Subsill Matt Silver can be installed as the fourth side of the door frame or retrofitted into existing setups, providing flexible application in both new and refurbished projects. It effectively seals gaps from 17mm to 22mm, helping to control airflow and maintain internal climate stability.

Its thermally broken design meets insulation and thermal bridging standards, and it’s compatible with a wide range of door and frame materials including wood, PVCu, fibreglass, aluminium, steel, and carbon fibre.

Equipped with pre-drilled drainage holes, this threshold manages moisture efficiently, reducing the risk of water ingress. It also fits directly over carpets, delivering a flush, accessible finish without additional adjustment.

A non-slip surface ensures safe, secure footing—even in wet conditions—and each unit comes with end caps to close off the front channel for a polished, professional look.

For level threshold installations, pair this product with the Proline AM5Ex – 04CP220 for a complete, integrated system.

Key Benefits

• Built for Subsills: Designed for PVC, wood, or composite subsills

• Installation Flexibility: Install as fourth frame side or retrofit

• Gap Sealing: Effective for 17mm–22mm openings

• Moisture Management: Pre-drilled drainage holes included

• Thermal Break: Reduces bridging and improves insulation

• Material Compatibility: Works with wood, PVCu, fibreglass, aluminium, steel, carbon fibre

• Carpet-Ready: Seamless fit over carpets

• Slip Resistance: Safe, non-slip surface

• Tidy Finish: Supplied with end caps

• Pairing Option: Use with Proline AM5Ex – 04CP220

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