Slide

Invisible Frame. Thermal Excellence.

With 32–44 mm double or triple glazing, the TH+ delivers exceptional insulation while preserving seamless transparency.

Vitrocsa TH+ Invisible Frame Sliding System

The Vitrocsa TH+ Invisible Frame system merges large-scale glazing with premium thermal insulation and flawless architectural integration. Designed to disappear into walls, floors, and ceilings, it supports massive glass panels with no visible structure — delivering clean lines, energy efficiency, and ultimate flexibility.

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Thermally broken system with 32–44 mm glazing

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Supports sliding panels up to 20 m² — no weight limit

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Ultra-slim 22 mm vertical connection between panels

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Fully recessed frames for zero threshold design

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Available with one or several sliding tracks

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Options for pocket doors, open corners, mosquito nets, and motorisation

About the TH+ Invisible Frame System

Invisible aesthetics. Unrivalled insulation.

The TH+ Invisible Frame System is designed for high-performance architecture where transparency, thermal comfort, and design freedom converge. It offers powerful insulation, weather resistance, and security in a system that virtually disappears.

Thanks to its advanced thermal break, this system is ideal for exposed, high-altitude or coastal settings. All framing is hidden from view — enabling seamless floor-to-ceiling glass with minimal sightlines and no architectural intrusion.

Whether you’re building a luxury home, gallery space, or contemporary facade, the TH+ delivers the balance of performance and purity architects demand. It’s built to handle scale, climate, and elegance — effortlessly.

How the Invisible Frame System Works

The TH+ uses recessed aluminium profiles and integrated sliding tracks to conceal the entire frame within the floor, ceiling, and wall structure. Only the vertical glass connection remains visible — a slim 22 mm detail that keeps your focus on the view.

Even with oversized glass panels, the system glides effortlessly thanks to hidden stainless steel rollers. Optional add-ons like motorisation, insect screens, and open corners allow it to adapt perfectly to your space and lifestyle.

Technical Specifications

Minimal sightlines meet high thermal performance and large-scale flexibility

Glass Thickness

Compatible with insulated glazing from 32 mm to 44 mm for optimal thermal and acoustic insulation.

Panel Size & Weight

Handles sliding glass panels up to 20 m² each with no weight limitation.

Vertical Sightline

22 mm slim connection maximises transparency and architectural purity.

Frame Integration

Fully concealed frames in floor, ceiling, and wall enable a flush, seamless appearance.

Sliding Track Options

Supports one or several track configurations to suit project-specific layout and access needs.

Performance & Protection

Tested for high wind and weather conditions; compatible with RC2-grade security systems.

Customisation & Accessories

Options include pocket door integration, motorised operation, mosquito screens, and open corners.

Finish Options

Anodised 25-micron aluminium as standard; custom powder-coated and anodised colours available.

Want to maximise views and minimise structure?

Get a Quote for the TH+ Invisible Frame System

Speak to our experts about incorporating the Vitrocsa TH+ system into your project. We’ll guide you through technical options, configurations, and performance specs to meet your exact brief.

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.
  
 
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   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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TH+ Invisible Frame Showcase

Discover how architects around the world are using the Vitrocsa TH+ system to create fluid, frameless transitions between indoors and out.

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