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Our services

Security doors

Unique structure security door consisting of metal profiles and sheets brings out all the difference. Made from steel and dressed in wood (waterproof EDM, UMIDAX, Wood Veneer) with three directional armoured locks – high spec premium security doors. Any style, shape or colour – every single security door is bespoke!

Wooden Windows

Wooden sash windows, casement windows, French doors or fixed windows – all top quality that comes in a broad range, double or triple glazed. Any style, size or colour to match all budgetary needs. We can also supply Heritage windows for a Listed Building or a Conservation Area.

Aluminium Windows

Knight’s Mark aluminium windows can be manufactured in various shapes, styles and adjusted to different architectural styles. Bi Fold doors or sliding doors, casement windows or fixed windows – any RAL colours, anodized colours or even wood imitations. We can offer standard or slimline frame aluminium.

Professional Installation

Professional and friendly installation service is available to carry out doors or windows replacement, because your product is only as good as the installer that has done the job. Our fitters are trained to the highest standard, has over 10 years of experience and are CERTASS certified.

Welcome to Knight's Mark

Security Doors and Windows

We are a bespoke security doors and windows specialists. We design, deliver and install the product for you. Our security doors are the result of numerous tests conducted with various organisations to ensure the highest level and quality standards for you.


Our team will guide you throughout initial steps of selecting the right security parameters, locks and design variations. It’s our promise to give you a security consultation and full support and supply you like-for-like security doors at the lowest price on the market. We take attentive care of our customer’s from start till the final installation day and beyond. We will create the security doors you need – bespoke and invincible with a warranty for up to 15 years.

Here at Knight’s Mark we thrive for perfection and always seek to improve and innovate so your home or business gets the highest level of security and warmth and you get peace of mind for yourself and your loved ones.

Security Doors and Windows


Increasing number of burglaries is a huge concern in our society and we have a solution for it. Regular locks and chains are easily hacked without making too much noise. Most of such doors are made from poor quality materials used in mass production. Research shown (from ONS) that burglaries in 2017 has risen by 30% and there has been over 200 000 burglaries recoded in 2017 and very high number of them were not solved. The times are changing rapidly therefore you can’t take any risks on security. Traditional doors made from wood or plastic do not have a chance to withstand burglars nowadays. Regular doors also have poor thermal, acoustic insulation. Here at Knight’s Mark by applying our knowledge and experience we help to improve your homes or businesses security aspects.

Burglaries increased

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We are professionals throughout the whole supply chain and specialise in design, manufacturing and fitting of security doors and windows for over 9 years. The company offers a wide range of doors and windows for houses, apartments, vaults, hospitals, hotels, theatres and many other public and privately owned buildings.

Highly motivated team is ready to evaluate your home or business facilities and match the best security options for you.

We allow our customers to be a part of the business and give the possibility to make their own door design. This way you can put your personal touch on the final product and make it unique.

*Maximum 3 files (10mb file limit).

This site is protected by reCAPTCHA and the Google
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