Are you considering new doors or already selecting them, but your home still has old steel door frames? Do you want a complete door set with a casing frame in the same decor but worry about the installation process? Are you concerned about the dust and noise that come with removing the original steel frames? Then read on...
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The solution: OKZ or steel frame covering
The OKZ system covers old, unattractive steel frames with new, modern ones.
Steel frame covering allows you to overlay existing steel frames without removing them. It conceals standard steel frames, while for older apartment block frames with a so-called "nose," we offer OKZ with an 85 mm width. Even entrance doors can have their steel frames covered with a partial OKZ, ensuring an aesthetically pleasing interior appearance while maintaining external security.
Custom-made for a perfect fit
By choosing OKZ to overlay your existing frame, you save yourself the hassle of demolition, making the process quick and clean. The most crucial step is precise measurement of the opening with the existing steel frame. Measurements are taken at multiple points to ensure a perfect fit. We strongly recommend entrusting both the measurement and installation to a qualified professional.
Things to consider
One of the advantages of this system is that it can cover even slightly misaligned or deformed old frames. However, be aware that the passage size will be slightly reduced—by about three centimeters.
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OKZ 60 mm for standard steel frames | OKZ 85 mm for steel frames in apartment buildings |
Better use of living space
With OKZ, you can plan a new layout for your interior, including changing the door opening direction (from right-handed to left-handed and vice versa). You can also switch from traditional swing doors to sliding doors.
With OKZ featuring an 85 mm overlay (used for steel frames with a "nose" found in many apartment blocks), you can change the side orientation and even make the door open into a different room than originally intended. With OKZ featuring a 60 mm overlay (for standard steel frames), you can change only the door's side orientation.
You can choose from a wide range of decors in various surface finishes—simply select your preference.
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Additional benefits
The OKZ system provides better sound insulation than old steel frames. It features built-in seals that significantly reduce noise transmission. The aesthetic improvement is immediately noticeable, and from the very first door closure, you'll appreciate the elimination of the unpleasant sounds associated with old steel frames.
TIP: Choosing the right door handle with OKZ | ![]() |
If you have selected a complete door set, just the door leaf, or an OKZ frame, get in touch with us—we will be happy to prepare a price quote for you. You can send a completely non-binding inquiry, and we will respond quickly, or you can visit one of our stores. Do you have any questions or need more product information? We are happy to help. Call us or write to us—our experts are here for you!