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Security door or reinforcement: decide after assessing the existing door

Published on 4 August 2026 · Verified on 18 September 2026 · The Mestravaux.lu team

You want to strengthen the entrance while perhaps retaining its appearance. Establish what can remain and what must change first. Reinforcement, an upgraded lock and a complete doorset do not necessarily describe the same work or evidence.

The essentials in 30 seconds

  • Assess the existing door before selecting a solution.
  • List retained and replaced parts in each offer.
  • Check product evidence and fitting conditions.
Security door or reinforcement of an existing door?

Distinguish the interventions

Fichet distinguishes reinforcing the retained door from replacing it with a security door. Request a list of retained and new parts: the label alone describes neither frame treatment nor finishes.

Grille de décision
SituationBlindage existantPorte blindée neuve
Dormant sainpossiblepossible
Dormant faiblepeu cohérentensemble neuf à étudier
Aspect à conserveravantagefaçade à valider
Passage étroitimpact limité selon systèmecotes à recalculer

Cette grille prépare la comparaison ; elle ne remplace pas le diagnostic du support et du produit précis.

Have the door and surroundings examined

Report frame movement, rubbing, past repairs or visible cracks without dismantling. Ask whether the existing structure can accept the solution and why. Record required passage and occupant needs. Where appearance is prescribed or others share the decision, clarify required agreement before ordering.

Check the claimed security scope

The Police recommends entrance doors of at least RC2 class. Request evidence for the proposed product.

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Compare work and constraints

Separate removal, possible frame retention, reinforcement, lock, support adaptation and finishes. Request finished passage dimensions and threshold treatment. If acoustic, thermal or fire-resistance functions are needed, request their own evidence; a security promise does not answer these questions.

Arrange handover and service

Request demonstration of keys, locks and opening from inside. Record defects and responsibility for corrections. Keep product reference, promised documents, instructions and key-copy information. Clarify help for jamming and spare parts without assuming round-the-clock callouts are included.

Related guides to continue

Frequently asked questions

Does changing a cylinder mean full reinforcement?

Have the intervention described precisely. Cylinder-only changes do not describe work on the whole door and frame.

Is reinforcement always cheaper?

Compare complete offers after assessment. No verified local price gap is published here.

Can the landing-side appearance remain?

Have the drawing and any constraints confirmed before ordering. Feasibility depends on the existing door and solution.

Does a security-door label guarantee a class?

Request the document matching the offered reference and configuration. A commercial label is insufficient.

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