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Replicate the appearance of traditional steel doors from a bygone era with classic glazing bars and panel designs to create a vintage look.
Alitherm Heritage has been designed to offer a solution for heritage properties and building renovation projects where there is a need for a modern replacement or alternative to old steel.
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!
Our high quality window and door products are backed by the same high quality customer service. Technical advisors are just a phone call away to answer all your questions no matter how technical.
Typical help provided includes:
We provide a FREE sample service to assist with surveying decisions, design considerations, or planning applications – just pick up the phone and ask.
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...really helpful with all my technical queries, which helped make sure my orders were mm perfect and the doors all went in smoothly...
They look great - will do it all again in our next house!
Super customer service, they actually answer the phone and call back promptly if they’re not available... very helpful throughout with technical advice.
Our fabulous Heritage Doors featured on
George Clarke’s Old House New Home (The Edwardian house in Golders Green London)
broadcast on Channel 4 in November 2018
Watch the full episode here or
Watch the 90 seconds programme highlights
"Beautiful doors" - George Clarke (Channel 4 - George Clarke’s Old House New Home)
"Really happy with those doors" says homeowner Lauren
For when you need modern, secure, thermally efficient doors without sacrificing the heritage and character of your traditional or period property.
This extremely versatile aluminium door system is an authentic and cost effective glazing solution ideally suitable for a wide range of applications including heritage, listed, retro refurbishment and Art Deco projects. Looks like steel.
With slim sight lines that create maximum glass areas the stepped frame profiles, glazing bar options and hardware choices offer a classic appearance with excellent thermal and operational performance.
Exclusive hardware and a dedicated window system with matching frame profiles is also available to compliment this door system.
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 C (WER C) under the latest tougher June 2022 (Document L) building regulations when installed with our high specification double glazed unit.
Single or double external heritage doors
Balcony Doors
Open out or open in
Available with fixed side and top lights
Window Energy Rating of C (WER C)
Individual 24mm toughened double glazed units
Gasket glazed system
Multipoint locking with Avocet ABS cylinder
Traditional handle range and finishes
Made to measure design options
NEW STEEL LOOK HERITAGE BI-FOLD DOORS
Combine retro steel style with modern strength and exceptional thermal performance
WHY BUILD A SOLID WALL WHEN YOU CAN HAVE A GLAZED PARTITION?
Interior glazing system for screens and room dividers using ultra slim aluminum steel-look framework.
...trumps the steel-type systems on thermal performance and cost.
The grasp of the importance of design and quality of manufacture from the Marlin Team is second to none.
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.
"No other supplier we contacted could offer the same quality, value or look."
| File Type | Document Description | Download Document |
|---|---|---|
 |
Alitherm Heritage Section identification Guide |
Download (33.5 MB) |
|
Alitherm Series Supply only – Guide to installation |
Download (403kb) |
| Product Type | Doors |
|---|---|
| Material | Aluminium Polyamide |
| Dual Colour | ✔ |
| Thermally broken | ✔ |
| Max width | 900 |
|---|---|
| max height | 2100 |
| Max weight | 60 |
| Thermal suitability | ★★★★★ |
| Min Glazing | 24 |
| Max glazing | 32 |
| Multi-point | ✔ |
|---|
| light duty | ✔ |
|---|
Read our buyers guide to the best Alternatives To Steel Windows and Doors
Read our guide to conservation area property window replacement
And we are rated ★★★★★ on Google
need more reasons? click here
or
"our builder said they were the best supplier and fitter they had ever used"
Transform your home and enjoy the benefits today. Set your budget and spread the cost.
Improve your home now with our payment options
Marlin Windows Limited would like to offer you an interest free loan on our Alitherm Heritage doors for up to 12 months.
We partner with Mitsubishi HC Capital (UK) PLC trading as Novuna, a leading financial services company with over 30 years’ experience of providing finance solutions.
The provider of choice for more than one million customers across the UK.
Credit is available to UK residents aged 18 and over and is subject to affordability, application, status and lending criteria.
You must have an email account as interest free loans apply to online credit applications only.
A deposit is required on all orders.
We also offer credit at Representative 7.9% APR variable, over terms up to 60 months.
Typical Example: Price of goods £10,000
Amount of loan : £5000
Deposit : £5000
60 monthly payments of £101.51 at an APR of 7.9%
Subject to affordability, application, status and lending criteria. A deposit is required on all orders. Terms and conditions apply.
Marlin Windows Limited is a credit broker, not a lender.
Authorised and regulated by the Financial Conduct Authority for consumer credit and non-investment insurance activities.
