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Replacement Steel Heritage Doors

Our Heritage Doors Featured on George Clarke's Old House New Home London Episode on Channel 4

Alitherm Heritage Doors – Aluminium that looks like steel!

Key Features

0% Interest Free Credit available on Heritage Doors (T&Cs apply)

Ultra slim framework

Fully compliant with latest building regulations

Replicates the appearance of steel

A fraction of the cost of steel

Approved replacement for listed buildings by many council authorities

Paint finish guarantee – 25 years

10 year Manufacturers Warranty

Rust proof

Alitherm Heritage Doors

Alitherm Heritage has been designed to offer a solution for heritage properties and building renovation projects where there is a need for a modern aluminium replacement for old steel.

Replace your old drafty steel doors with modern secure, thermally efficient aluminium steel replacements.

Replicate the appearance of traditional steel doors from a bygone quintessential Edwardian, Georgian or period style era with classic glazing bars and panel designs to create a vintage look.

Product Information

The Smart Alitherm Heritage door is the ideal replacement for steel doors on heritage applications such as building renovations or apartment conversions.

The Alitherm Heritage door provides the solution for conservation areas where planning regulations require a like-for-like product replacement.

Alitherm Heritage door profiles feature the system’s signature slim sightlines and elegant lines that complement Smart’s existing Alitherm Heritage window and mimic those of steel doors.

The system has all the advantages of modern aluminium profiles that feature polyamide thermal breaks, allowing the system to achieve a Window Energy Rating of B (WER B) under the latest tougher June 2022 (Document L) building regulations when installed with our high specification double glazed unit.

Design Applications

Single or double external heritage doors
Balcony doors
Open out or open in
Available with fixed side and top lights

Features

Window Energy Rating of B (WER B)
Individual 28mm toughened double glazed units
Gasket glazed system
Multipoint locking with Avocet ABS cylinder
Traditional handle range and finishes
Made to measure design options

Get 0% Interest Free Credit on Heritage Doors

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Document Downloads

Alitherm Heritage Brochure

Alitherm Products

Alitherm Heritage Product Data Sheet IMS123AH.201410

Alitherm Heritage Supply only – Guide to installation

Alitherm Heritage Section identification Guide

Buy Online – EXTERNAL Ready Made Heritage Doors

READY MADE – DELIVERED IN APPROX. 7-10 WORKING DAYS

 

Helpful guides

IS ALUMINIUM A SUITABLE ALTERNATIVE FOR THE REPLACEMENT OF STEEL PRODUCTS? 
Steel look Aluminium Windows, Doors and Internal Room Dividers and Doors look very similar to their Steel counterparts but offer several benefits of being Aluminium.

The benefits of modern, secure, thermally efficient aluminium windows with the heritage and character of traditional steel at a fraction of the cost.

 

READ GUIDE
I’d wholeheartedly recommend Marlin Windows. We ordered Steel Replacement French Patio doors and Windows. They are absolutely beautiful. And they were an absolute pleasure to deal with. Thanks Marlin!
Myar Craig-Brown

Premium Security Fitted As Standard With Patented Active Cam Technology

The clever locking system of the Avocet ABS® diamond grade cylinder knows when it has been snap attacked and fires into action to create a robust barrier to entry. The patented Active Cam TechnologyTM is hidden deep within a solid Molybdenum cam which is 20% stronger than steel, and delivers ultimate resistance against a lock snapping attack and snap/twist manipulation. All of the snap technology is focused on the outside part of the lock only. This makes sure that maximum strength is given to the inner part of the lock – the part that has the job of securing your door.

 

COLOURS AND GLAZING

Our aluminium profiles are polyester powder coated by our systems suppliers using the very latest paint application techniques guaranteed for 25 years.

Fully compliant to the latest June 2022 building regulations our standard double glazing is the exceptional light transmitting, energy saving ClimaGuard® A+ low emissivity (Low-E) glass manufactured by Guardian Glass.

 

Why choose Marlin?

Reasons why you should expect 100% satisfaction.

Quality Control

We believe that our quality standards are unrivalled. Our manufacturing processes and activities are monitored with well defined controls and inspection procedures are performed by trained personnel.

Care

We respect you, your property and your project taking care over each detail from order to delivery to your post installation satisfaction.

Project Focus

Your project is important to us. We manufacture to your made to measure requirements so that we get it exactly right. See example case studies of our project work.

Frequently Asked Questions

If you require any support, please don’t hesitate to review our FAQ’s below or drop us a message on our contact form here

How energy efficient are your windows & doors?

All of our products are very thermally efficient; they meet and exceed all current building regulations.

Our aluminium profiles are thermally broken and benefit from high performance double glazing with a centre pane U Value of 1.2 W/m2 as standard. The maximum overall U value of any of our products is 1.6 W/m2, with many of our door and window products offering even lower U Values.

What information must be provided in order to get an accurate quotation?

We will ask you to provide the following information:

  1. Approximate dimensions (width x height)
  2. Basic design/layout
  3. Project location

How long will my quotation take?

We aim to return all quotations within 24 hours however large projects may take longer.

Come and explore…

Aluminium Heritage Windows,Traditional Steel Replacement Windows, Heritage Bifold doors, Internal Heritage Doors.