Pose des Corniches pour LED : Guide Pas à Pas

Manuel de pose pas à pas pour créer des gorges lumineuses sans zones d'ombre, dissiper la chaleur des LED et réussir les raccords d'angle.

La pose de corniches pour lumière indirecte en polyuréthane crée une ambiance lumineuse tamisée raffinée en quelques étapes d'installation simples.

Étape 1 : Traçage de la Ligne Guide (10 à 15 cm sous Plafond)

Surface Inspection and Reference Line Layout — Inspect the wall and ceiling surfaces for levelness and clean away dust or loose material. Measure down from the ceiling line to establish a clearance distance between 10 cm and 15 cm, then snap a continuous chalk line along the perimeter wall to guide lower profile placement. Estimated Duration: 30 minutes Common Mistake: Installing profiles over dusty or flaking paint surfaces without cleaning, leading to premature adhesive bond failure.
Measuring and 45-Degree Miter Cutting — Measure the wall perimeter accurately. Cut corner joints at a precise 45-degree miter angle using a fine-tooth miter saw. Dry-fit corner pieces against the wall to verify joint tightness before applying adhesive. Estimated Duration: 45 minutes Common Mistake: Using coarse saw blades that tear the high-density polyurethane edges, creating wide seams that require excessive filling.
Polyurethane Adhesive Application — Apply continuous beads of polyurethane (PU) mounting adhesive along the rear mounting flanges that contact the wall surface. Do not use standard silicone adhesives. Ensure even coverage along the entire length of the profile. Estimated Duration: 30 minutes Common Mistake: Using standard silicone sealant instead of dedicated polyurethane mounting adhesive, causing long-term adhesion failure.
Profile Mounting and Mechanical Screw Fixing — Press the profile firmly onto the marked reference line. Immediately drill countersunk pilot holes through the profile into the wall structure at 40 cm to 50 cm intervals. Secure the profile using wall anchors and screws until flush with the material surface. Estimated Duration: 60 minutes Common Mistake: Relying exclusively on adhesive and skipping mechanical screw fixings, which violates safety protocols for overhead moldings.
Joint Sealing and Sanding Preparation — Fill profile butt joints, corner miters, and countersunk screw heads with suitable joint compound or polyurethane joint filler. Allow the filler to cure completely according to manufacturer instructions, then sand smooth using grain 180-220 sandpaper. Estimated Duration: 45 minutes (excluding curing time) Common Mistake: Sanding with coarse sandpaper below 180 grit, which scratches the factory-primed polyurethane surface.
Priming and Final Paint Coating — Although profiles arrive factory-primed, applying an additional primer coat over sanded filled joints ensures uniform absorption. Finish with two coats of high-quality interior paint. For outdoor or high-UV exposed installations, UV-resistant exterior paint is mandatory. Estimated Duration: 90 minutes (excluding dry times) Common Mistake: Using standard non-UV resistant interior paints on exterior applications, leading to surface discoloration over time.

Étape 2 : Découpe d'Onglet à 45 Degrés

Sciez les profilés en boîte à onglets en appliquant une marge de coupe de 10% pour des angles rentrants et saillants parfaits.

Étape 3 : Encollage Mural et Pose de la Réglette Aluminium

Appliquez la colle structurelle colle de montage à base de PU (séchage en environ une heure) sur le talon mural et collez une bande d'aluminium dans la gorge pour dissiper la chaleur sous -100 °C / +80 °C.

Étape 4 : Masticage, Ponçage et Mise en Peinture

Comblez les jonctions au mastic souple, poncez au grain fin grain 180-220 et peignez sur l'apprêt primaire acrylique blanc monocomposant. Totalement étanche (inférieure à 1 %). Devis valables 7 jours, livraison départ usine départ usine.