What Villeurbanne building fabric can carry
The flat doors at Gratte-Ciel are tall and wide, well outside today's standard sizes. An off-the-shelf armoured door set will not fit those openings: you need one made to measure, or reinforcement that keeps the original leaf in place. The frame, bedded into masonry, takes the extra weight well, which is far from true everywhere else in town.
In the 1960s and 1970s blocks of Tonkin, Cusset and Ferrandière, the door is lighter and the frame is often fixed into a partition. That is the weak point: steel plate and a multipoint lock transfer the load onto the fixings, and therefore onto the substrate. We probe the fabric before proposing anything, and sometimes the conclusion is that the frame must be rebuilt before any reinforcement goes on.
On the Croix-Luizet houses and the dwellings of Maisons-Neuves, the front door is not always the exposed one. A ground-floor garden window, a garage door onto the street, a yard reachable from the neighbouring plot: reinforcing the entrance without dealing with those simply moves the problem a few metres, nothing more.
The co-ownership's consent, not just your neighbour's
A flat door is private property, yet the face seen from the landing forms part of the appearance of the common areas. At Gratte-Ciel, where the district was drawn as a single coherent scheme, that rule is taken seriously: colour, ironmongery and leaf dimensions are approved at a general meeting. We ask for the co-ownership rules before drawing anything up.
Reinforcing the existing door is the discreet option: the steel plate clads the leaf you already have, and the landing side can be kept close to its original look. A complete armoured set replaces everything including the frame, and it shows. In an older Villeurbanne building that point, rather than the stated performance, is usually what decides between the two.
If you rent, your landlord's consent is needed alongside the managing agent's, and the work stays with the flat when you leave. In the Tonkin co-ownerships, where many flats belong to landlords who live elsewhere, that double permission takes time to obtain. We measure, we explain what each option means for your particular fabric, and the itemised quotation is presented before work starts. Nothing is ordered until every permission is in hand.
How does this service work?
Techniques, typical situations, standards and things to watch out for: it is all on our door reinforcement page. This page focuses on what the service involves in Villeurbanne.