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Tailored for High-Security Environments

Engineered for police stations, embassies, and critical facilities, our transaction windows deliver advanced protection without compromising day-to-day usability.

Ready-to-Install Transaction Windows for High-Security Zones

Our prefabricated transaction windows are engineered for secure environments such as embassies, police stations, and critical infrastructure buildings. Available in various materials and resistance classes, they provide a customised and certified solution for bullet, blast, burglar, fire, and smoke protection.

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Prefabricated high-security units with glazing, cladding and transfer tray

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Available in aluminium and steel constructions to suit various needs

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Bullet resistance up to FB7-NS and burglar resistance up to RC6

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Optional fire and smoke protection with SECUFIRE® steel system

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Compatible with S1es, S2es-w, S6es-w and SECUFIRE® product series

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Supports custom communication and video integration

Certified Protection with Functional Flexibility

Transaction windows built to secure what matters most

Designed to withstand the most demanding security threats, our transaction windows are customisable to fit multiple security classes including bullet, blast, burglar, fire, and smoke protection.

Each unit comes prefabricated for rapid deployment and can be installed internally or externally in masonry, reinforced concrete, or other wall structures. Optional accessories like integrated communication and video modules ensure seamless operation in public-facing roles.

Whether used in public institutions or private facilities, these units offer architectural flexibility while maintaining uncompromising performance. Our transaction windows represent the trusted standard for reliable, compliant protection.

Technical Specifications

Performance levels depend on selected series and material

Forced Entry Resistance

Tested in accordance with DIN EN 1627–1630, with resistance classes up to RC6 depending on series (S1es, S2es-w, S6es-w, SECUFIRE®).

Bullet Resistance

Up to FB7-NS as per DIN EN 1522–1523, with certified glazing in accordance with DIN EN 1063.

Blast Resistance

Tested with explosives up to 500 kg at a 24 m distance. Classified GSA 2 (Very High) and ISO B (No Hazard).

Fire Resistance

Depending on selected design, up to T90/EI90 fire resistance with SECUFIRE® steel frames.

Smoke Protection

Certified up to S200 for smoke control in steel-based variants.

Surface Options

Available primed, painted, anodised, powder coated or clad in timber, stainless steel, stone, or bronze.

Integration

Supports transfer trays, communication modules, and video tech. Compatible with all SYSTEM SÄLZER products.

Installation & Design

High prefabrication enables quick installation in internal or external applications. Installed into masonry, concrete, or framed structures.

Need a Bespoke Security Window?

Get Expert Advice Today

Our team will help you select and customise the ideal transaction window system to meet your security and architectural requirements. Reach out for a consultation or quote.

What Our Customers Say

We take pride in delivering exceptional glazing solutions and outstanding customer service. Here’s what some of our happy clients have to say about working with Minimal Frame Projects.

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   Alison Burton 
 
 
 
  Absolutely delighted with our recent purchase of sliding doors for our new orangery, part of a major renovation of our home.  The quality is top-notch, and the sleek design will perfectly complement or modern kitchen and frame the amazing views we have. The door’s sturdy construction and beautiful minimalist finish add a touch of elegance to the space. Highly recommend this product to anyone looking to enhance their home with stylish and functional sliding doors.
  
 
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   James Trinder 
 
 
 
  Minimal Frames have been outstanding throughout the process, from planning to install and aftercare. At all times their communication has been top-notch; fast and effective. Quality of the glazing itself is excellent, the installation process was pain free and the windows and pivot door look incredible. They’ve been really strong on aftercare too, checking in that all works well and correcting a very minor issue quickly. I really cannot fault any part of our experience and wouldn’t hesitate to use them again and recommend to others.
  
 
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   Narmina Hasanova 
 
 
 
  Bob and his team have taken on our tricky glass extension installation, embraced its complexity and delivered it to perfection. It truly is a stunning addition to the house. The team that worked on site was extremely pleasant; always on time, quiet and polite. The project turned out to be long for its complexity, but the final result was worth the wait. We are very pleased with the outcome and hope it will keep us cool even in the heat of summer. Thank you MFP team! With kind regards, Emil and Narmina
  
 
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   Elliott Raggio 
 
 
 
  I am pleased to say that overall, I am delighted with the honorable customer service from Robert the company director at Minimal Frame Projects. Thank you to the surveyor and installation team who executed a challenging install for my bespoke Glass Pivot exterior door. Credit does go to Robert for being understanding, a man of his word and overcoming obstacles to ensure complete customer satisfaction.
  
 
      Posted on Google  
   
   Bruce Fraser 
 
 
 
  Ultimately an excellent result. Great product. Bob, Mollie and the team worked hard at solving problems and timing. We appreciated their effort and approach.
  
 
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   G B 
 
 
 
  Bob and Minimal Frame have stepped in to help sort out problems with another glazing company. He has kept us well informed throughout and has worked tirelessly to deal with the manunufacturers to get the doors delivered and the install started. We were 90% done by Christmas which was a huge relief. I've found Bob to be straightforward, transparent and responsive and am very grateful for his help fixing our previous issues. Additionally, his install team have been highly professional and meticulous in getting the install right.
  
 
  
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Visit Our Showroom in Surbiton

Visit Our Showroom & Explore Premium Glazing Solutions

Experience the quality of our slimline glass doors, windows, and structural glazing in person. Whether you're planning a project or need expert advice, our team is here to help.

Located in Surbiton, we welcome homeowners, architects, and developers to see our range up close.

Call 0207 550 6550