The structure decides, not the brochure
In the Parilly and Terraillon blocks the structure works in your favour: concrete walls and floor slabs give solid anchorage, provided the fixings reach the load-bearing element and not the lining wall built in front of it. Everything is located before a hole is drilled, service ducts included, since their real routes rarely match the drawings.
In the old village the question shifts to the frame. Many pre-war timber doors hang in tired jambs, sometimes rotten at the foot. Fitting reinforcement cladding to a frame that no longer holds amounts to screwing steel onto nothing: the force of a break-in transfers straight to the fixings, and from there to the masonry.
Hence the choice. Reinforcement cladding keeps your leaf, wraps it in steel sheet, protects the frame with angle sections and adds anti-lift pins. A full armoured set replaces everything and no longer depends on the original support — but the odd-sized doors of the village then call for something made to measure, so the opening is surveyed before anything else is discussed.
The landing is not entirely yours
The outer face of a flat door opens onto shared property. The co-ownership rules may impose a colour, a model or a finish, and the refurbished Terraillon stairwells often apply a recent uniformity rule voted at a general meeting. Ask the managing agent before ordering: the shade of a facing panel is far easier to choose beforehand than afterwards.
For a house in the old village or around the Perrières whose door is visible from the street, changing its outward appearance can require a prior works declaration. The commune's planning department will say what applies at your address, and the rules are not the same from one street to the next. That check costs one phone call and saves putting things back.
Finally, reinforcement protects an opening, not a home. Once the door becomes the hardest point, attention moves to the ground-floor window, the balcony French window, the cellar in the basement or the attached garage of a house at Les Genêts. Consistency across the whole property counts for more than the performance of a single leaf.
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 Bron.