Heritage Windows and Doors Collection

✔ Preserve the Historic Charm: Our heritage windows are specially designed to maintain the architectural charm of listed properties while meeting building regulations. It is an ideal choice for listed building renovation and large-scale refurbishment projects. Also popular among modern homeowners.

✔ Improved Security: Heritage Double Windows has passed the PAS 24:2016 security test, which provides enhanced security compared to traditional single-glazed timber windows.

✔ Long lifespan: Aluminium windows are superior for protecting from rust or rot for decades. Window frames are known for their durability and can last indefinitely. Traditional timber, steel, or uPVC heritage windows need replacement within 30-35 years.

✔ Double Glazing: Heritage double-glazed windows offer better insulation compared to single-glazed heritage timber windows.

✔ Triple Glazing: Smart Alitherm Heritage Windows supports 28, 32, and 36mm triple glazing units, which align with the latest building regulations. Triple-glazed heritage windows provide better sound insulation for quieter homes.

✔ Various Glass Options: You can opt for Low-E glass, solar control glass, toughened glass, and laminated glass to meet various needs.

Durajoin is an ethically run window fabrication company to cater needs of the Fenestration Industry. Our goal is to provide high quality, bespoke solutions under one roof to our clients – may it be windows, doors, railings, gates or Juliet balconies.

We offer work in different materials, primarily with uPVC, aluminium, timber, and metal. Durajoin has a team of professionals working hard to support you with answering your queries and guiding you with a choice of top quality products.

At Durajoin Aluminium Windows and Doors, we design, manufacture, and install high-quality aluminium windows, bifold doors, sliding doors, entrance doors, conservatories, and roof lights across London and surrounding areas. Whether you’re a homeowner looking for modern aesthetics, a commercial developer needing high-performance glazing, or a trade professional seeking supply-only aluminium doors and windows, we have the perfect solutions.

🔹 Over 20 years of experience in the industry
🔹 Premium quality aluminium doors and windows built to British Standards
🔹 Competitive pricing with trade and bulk discounts
🔹 Fast lead times – manufacturing & delivery within 7 days
🔹 Bespoke made-to-measure designs

With our expert team and commitment to exceptional craftsmanship, we ensure that every product offers unmatched durability, security, and thermal performance.

Smart System Designed and developed the Alitherm Heritage windows and doors range to meet the needs of refurbishment of period properties (listed buildings) and renewal projects, especially in sensitive planning areas. These windows and patio doors are perfect for Victorian and Art Deco builds, having already been successfully used in many renovation projects across the UK.

Alitherm Heritage provides a modern replacement for traditional timber windows, making it suitable for projects where planning regulations require sympathetic materials, including listed buildings. The architectural windows system already been approved for project in Islington, Camden, Tower Hamlets, Watford Borough Council, Essex County Council, and Cadw, the Welsh Government’s service for historic environments service.

Both Alitherm Heritage door and window ranges have super slim profiles and sight lines that reflect the look of traditional crittall steel doors and windows. They also provide excellent thermal performance, achieving a ‘B’ Energy Rating. With slim, thermally-broken profiles, Alitherm Heritage windows come in many configuration, including fixed-pane, sash, top-hung, side-hung casement, pivot, and tilt-and-turn.

Alitherm Heritage doors work well for both single and exterior french door applications and are available in various sizes. They come with a secure multi-point lock and face-mounted finger-thrown locking bolts. Both the window and door systems have a U-Value of 1.5 W/m²K when installed with the right double glazed or triple glazed unit and are available in single or dual colour powder-coated finishes.