S309A/T Inward Open Timber / Alu-Clad Timber Framed Entrance Door

This triple-glazed timber framed door (alu-clad S309A and timber-only S309T) is a high-performance, energy-efficient inward-opening glazed door.

With optional aluminium cladding, it combines timber warmth with durability and low maintenance. Available as single or double doors, with or without sidelights, it offers design flexibility and excellent thermal insulation.

Based on the P31 frame, it mirrors the S307 outward-opening door in an inward-opening design.

Features and benefits:

• Triple-glazed timber-framed door for outstanding thermal performance and energy efficiency.
• Optional aluminium cladding provides durability, weather resistance, and low maintenance.
• Inward-opening design, sharing the profile and performance of the S307 outward-opening model.
• Available as single or double doors, with or without sidelights.
• Typical U-values of approximately 0.76 W/m²K, suitable for Passive House-standard homes.
• Can be specified with a Juliet Balcony.
• PAS 24 Certified.

Project showcase

The S309 door has been used in seafront Passive House apartment blocks, award-winning SIPS family homes, sensitive barn renovation projects and multiple contemporary passive house projects. Read the Cricket Heritage case study below, or get a taste of the vast array of project applications for this door in the inspiration section of the product page on our website.

Create Something Distinct

Beyond custom dimensions and precision manufacturing, we provide the design flexibility to perfectly express your vision.

From custom shapes and specialized hardware to powder-coated trims and distinct hardware - find the finishes you need, whatever your project specification.

Browse available Door Handles and example Panel Designs for full customisation in your designs.