Double Garage Conversions

    Fortress Doors are one of the leading door companies in East Anglia. We have a skilled and professional team with many years of experience. Each job is different, some may require drainage, driveway repairs and depending on the pitch of the roof to which type of steel lintel is required, some jobs require brickwork whilst others require a facia.

    When removing the centre pier the roof will be held up by Akros until the new lintel is in place, if the opening is more than 4.875m then fillers of either brick or timber will be built. Once the building work has been completed the door of your choice will be installed in 2/3 days. Costs do vary so a visit to site is required to survey and quote as necessary. Please check out our reviews from our very satisfied customers.

    Check Out Our Colour Options:

    Green Wood Effect Laminate
    Anthracite Wood Effect Laminate
    White Wood Effect Laminate
    Black Wood Effect Laminate
    Rosewood Laminate
    Painted Golden Oak
    Irish Oak Laminate
    Red
    Anthracite
    Green
    Blue
    Beige
    Ivory
    Light Grey
    Cream
    Brown
    Chartwell Green
    Black
    White
    Painted Rosewood
    RAL Colour Options

    Here's What Our Customers Say:

    Fortress Doors
    5.0
    Based on 201 reviews
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    Sam Egner
    19:45 18 Aug 25
    Purchased a door a couple of years ago, door randomly faulted on Friday afternoon. By Monday morning the faulty unit was replaced and door fully functioning, no hassle at all. 10/10
    Twentyone Cubed
    10:52 14 Aug 25
    5 weeks from first quote to install. Fantastic customer service all the way through and couldn’t be happier with the final install. Couldn’t recommend highly enough. Have a good one Margaret!!
    Phil Turland
    17:50 13 Aug 25
    Excellent service from Andy and the team. The quality of the door is exactly as promised, really pleased, wish I’d had it done years ago.
    Michael Cochrane
    21:44 05 Aug 25
    Great service and great quality. Very pleased with the whole experience.
    Virginia Fewell
    19:05 05 Aug 25
    From the time we accepted the quote to the completion on installing the garage door, Andy kept us informed of the progress of the door being made and when to expect the installation. Date agreed and the guys arrived and removed old door and installed the new roller door within 3 hrs including cleaning up completely.
    Fantastic Service all round. Would recommend them 100% for their Professional Service, workmanship and quality of their product.
    Jennifer Darling
    15:55 04 Aug 25
    Really pleased with the service we received from Andy and the team. Top quality products and a friendly service, bonus points for cuddles from the lovely Margaret 🐶
    Ella Crisp
    11:56 31 Jul 25
    Andy and the team at Fortress Doors were a pleasure to deal with from start to finish. Super professional but also really easygoing - they made the whole process of getting our new garage door sorted stress-free. The quality of the work was spot on and I wouldn’t hesitate to recommend them.
    Amelia Kemp
    11:52 31 Jul 25
    Andy was absolutely great. My new roller door looks amazing and they even got rid of my old one. Hassle free, great quality and fair prices!
    Tracy Meakins
    17:15 24 Jul 25
    Wow!! Great service from survey to installation! Defo know their garage doors and what a great product installed. Just what we needed to secure our garage.
    Would highly recommend- don’t hesitate give them a call!!
    Sue Jackson
    10:39 19 Jul 25
    We were absolutely delighted with the service and advice we received in choosing garage doors and in the subsequent supply and fitting. Thank you.