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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.
Read our Buyers Guide: Alternatives To Steel Doors
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.
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!
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
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.
...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.
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.
We used Marlin for windows and internal steel look doors and screens on our recent self build project.
Marlin are not local to us but provided an excellent service from quotation, advice, redesigns and with very detailed comms throughout.
The windows and doors are the talking point of our entire build. Adrian from Marlin said that windows become the eyes of the house and I didn't forget that - our eyes are simply stunning.
Would highly recommend.
Combine retro steel style with modern strength and exceptional thermal performance
From our initial contact with Marlin Windows we have been very impressed.
Super customer service, they actually answer the phone and call back promptly if they’re not available... very helpful throughout with technical advice.The final products... look stunning.
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.
Click To Call
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.
| File Type | Document Description | Download Document |
|---|---|---|
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Alitherm Heritage Brochure Brochure |
Download (11.3 MB) |
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Alitherm Products Brochure |
Download (5.6 MB) |
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Alitherm Heritage Section identification Guide |
Download (33.5 MB) |
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Alitherm Heritage Product Data Sheet IMS123AH.201410 |
Download (508 KB) |
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Alitherm Heritage Supply only – Guide to installation |
Download (403kb) |
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
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"our builder said they were the best supplier and fitter they had ever used"
External or internal single and double doors with or without side lights or top lights in our most popular standard matt black specification.
Please allow additional time for other colours.
(Terms and Conditions apply)
Terms and Conditions.
Lead time commences from the date of signed and received Order Acknowledgement and deposit.
Amendments to the order after the date of sign off will increase the indicated 3-week lead time.
Deposit refunds cannot be made if an order is cancelled after the date of sign off.
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.
