The Heritage Glazing Collection
Replicate the appearance of traditional steel doors from a bygone era with slim thermally efficient aluminium profiles, classic glazing bars and panels to create a vintage look.
Offering the Largest Selection of Heritage Glazing in the UK
High performance aluminium heritage windows and doors Internal and external glazing options for period or contemporary applications – Including listed buildings and conservation area properties
Alitherm Heritage HISTORIC Windows
Elegant slim aluminium Heritage HISTORIC windows for period properties. the ideal choice for building conservation areas where building regulation demands like for like replacements.
Replicate the apprearance of traditional steel!
Classic Heritage Windows
Ultra Slim High Performance Windows
Transform your home with our slim window range, perfect for contemporary and heritage projects. Designed to combine the latest technical innovations with peerless aesthetics.
Classic Heritage Doors
With our signature ‘stepped’ look consistent across the outside of the door, art deco styling has never looked so good. Classic Doors also offer the modern levels of thermal performance that Building Regulations are demanding.
Steel Replacement Heritage HISTORIC Doors
Chic Industrial Style Aluminium Heritage HISTORIC doors that look like steel, at a fraction of the cost.
Aluminium that looks like steel!
Steel Replacement Windows
Steel replacement aluminium windows approved for listed buildings by many council authorities.
Industrial Style, Heritage Steel Replacement Doors.
Create the vintage steel look!
Aluspace: Interior Heritage Doors and Room Partitions
Dedicated interior glazing system for screens and room dividers.
Chic Industrial Style!
Heritage Bifold Doors
Steel style Heritage bifolding doors.
Harmonises perfectly with heritage windows.
High performance – traditional look!
Buy Online EXTERIOR Made to Measure Heritage Doors
NATIONAL DELIVERY IN APPROXIMATELY 4-5 WEEKS
Aluminium that looks like steel!
NOW WITH EASY PAY OPTIONS 
Buy Online Ready Made EXTERIOR Heritage Doors
NATIONAL DELIVERY IN APPROX. 7-10 WORKING DAYS.
Aluminium that looks like steel!
NOW WITH EASY PAY OPTIONS
Buy Online INTERIOR Made to Measure Heritage Doors
NATIONAL DELIVERY IN APPROXIMATELY 4-5 WEEKS
SLIMLINE INTERIOR ALUMINIUM HERITAGE DOORS
Chic Industrial Style!
NOW WITH EASY PAY OPTIONS 
It’s really difficult to know which company to go with as windows are such a huge chunk of any building budget and there are so many providers to choose from.
Marlin Windows were reassuringly professional, calm and helpful from first contact which made the decision to use them so right. The pre-sales team were full of advice – not in the least bit pushy, ontrary to stereotype and the advice was spot-on because they’d done it all before. The planning & timing was also spot-on (in fact, they took our building lag in their stride with no fuss – again, they understood what we were doing), the installers were super-efficient, friendly and accommodating and the follow-up has also been great. I cannot recommend Marlin Windows enough. I felt like I was in safe hands with a company who actually cared about me and my kitchen extension and my two sets of aluminium french doors! Even though they’ve done work on Z-listers mansions and been on TV (the installers were telling me!) – my little project was given due care and attention. The product looks amazing too… I suppose the windows might be much the same elsewhere and maybe even of similar price or cheaper, but the customer support, reliability, professionalism and interest at Marlin is second to none. We’re delighted with our choice and everyone who has seen them has admired the windows. I would recommend them without hesitation. I honestly think it’s a rarity these days to come across a company with values like Marlin so 5*s well-deserved.
Anne Corrigan
Latest projects
HERITAGE WINDOWS
Millhouses – Sheffield
HERITAGE WINDOWS
Wolfreton Lodge SIP New Build
STEEL REPLACEMENT WINDOWS
The Old School House
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.
Helpful guides
Replacing Windows In A Conservation Area
Approved Aluminium Windows For Conservation Areas.
1. Do I need permission?
2. What do local authorities say?
3. What help can I expect from my local conversation officer?
4. Can I replace wood with thermally efficient aluminium?
5. Which Aluminium Windows & Doors have been approved in conservation areas?
6. Which conservation areas have aluminium replacement windows?
7. What are the key features that enabled consent to be granted?
8. What do historic England say?
9. Featured Conservation Area & Listed Building Projects
Unrivalled Quality Customer Service
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:
- Choosing the right product
- Getting the right made to measure size
- Help with ordering
- Threshold advice
We provide a FREE sample service to assist with surveying decisions, design considerations, or planning applications – just pick up the phone and ask.
Call our Customer Service team on 01535 603909
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.
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 slim is the Heritage frame?
The Heritage outerframe has a sight line of 33mm.
Is the Heritage system suitable for listed buildings?
The Heritage slim systems have already been approved for listed building projects by many councils including:
London Boroughs of Islington, Camden and Tower Hamlets, Watford Borough Council, Essex County Council and Leeds City Council as well as Cadw, the Welsh Government’s historic environment service.
What thermal rating does the Heritage system achieve?
Window Energy Rating ‘B’ – when using correct profile, glass unit & spacer bar
Come and explore…
Aluminium Bi-fold Doors, Aluminium Heritage Windows, Traditional Steel Replacement Windows and Doors.
