0.0
mmof perceptible crossing barrier
2
.magnetic strips for tightness and comfort
1
.day of installation work in renovation mode
One of the manufacturers of wooden windows and doors from Włocławek approached us for support in selecting a threshold-free solution for a family with a 7-year-old child who uses a wheelchair. A low threshold of about 20 mm was installed in the terrace doors, which in practice became a barrier — the wheelchair wheels would “get stuck,” and every passage required the assistance of an adult.
The parents needed a completely flat transition: safe, convenient for everyday use, and not requiring complicated interference with the existing joinery.
The manufacturer turned to Alumaster for technical guidelines and for selecting a threshold that would achieve a “zero-barrier” effect while maintaining tightness and the aesthetic quality of the room–terrace transition.
1) Audit of the passage and measurements
(Alumaster: guidelines • Manufacturer: on-site measurements)
We defined exactly what needed to be checked: floor levels between the room and terrace, slope in the threshold area, drainage capacity, and the sash–floor interface. The priority was clear — to straighten the travel path to zero so that the wheelchair wheels would not catch on any edge, while at the same time maintaining airtightness when the door is closed.
2) System selection: MFZ renovation threshold with magnetic seal
(Alumaster: recommendation and selection sheet • Manufacturer: approval)
We recommended the MFZ — it eliminates the height barrier, and a single magnetic strip ensures tightness. The magnetic closure replaces a classic threshold edge: passage is smooth, and the strip works together with the sash during closing (no wheel lift and no catching).
3) Renovation-mode installation
(Manufacturer from Włocławek: execution • Alumaster: guidance and control points)
The team carried out the work without chiseling and without altering the frame geometry: removal of the old element, substrate preparation, installation of the MFZ, calibration of the magnetic strip pressure, travel tests (slow/fast, forward/backward), and multi-point closing tests. After installation, the parents received a brief care guide for the contact zone.
The child can enter the terrace independently, without asking for help — whenever they want and as many times as they want. This means real everyday independence and greater peace of mind for the parents.
A level transition means no wheel lifting and no tripping. Less sand “caught” on the threshold, easier cleaning, and an aesthetically clean entrance zone all year round.
The magnetic strip “holds” the closure without raising the threshold. The solution works the same in sun and rain, and passage remains smooth and quiet — with no sash catching.
The manufacturer’s team measured the level difference between the room and terrace, tested the existing threshold and sash operation, and checked the drainage. Based on this, a decision was made to aim for a “zero threshold” while maintaining tightness. (Alumaster: phone/documentation consultations, indication of key control points).
The installation team carried out a renovation-style “integration” without chiseling: removal of the old element, substrate preparation, placement of the MFZ, and calibration of the magnetic strip to the sash. Wheelchair passage tests were performed (slow/fast, forward/backward) as well as a closing test. (Alumaster: delivery of installation guidelines and calibration instructions).
The manufacturer confirmed smooth passage and quiet closing during a test with the child, and the parents received a short training on use and maintenance (cleanliness of the contact area, periodic strip inspection). (Alumaster: supporting materials — “yes/no” checklist, operational recommendations).
We are happy to share our experience and help you choose a solution tailored to your door designs.
