Pose des Bandeaux de Façade : Guide Pas à Pas

Manuel de pose extérieure pas à pas pour tracer la ligne d'étage, réaliser des coupes d'onglet nettes et sceller les gouttes d'eau.

La pose de bandeaux horizontaux de façade en polyuréthane délimite les étages avec élégance en quelques étapes d'alignement précises.

Étape 1 : Traçage Continu de la Ligne d'Étage au Laser

Step 1: Surface Inspection and Level Marking — Measure and mark the horizontal height line across the wall using a digital laser level. Clean dust and grease from the substrate using a dry cloth. Duration: 15–20 minutes. Common Mistake: Relying on floor-to-wall distance instead of a laser level, resulting in slanted installation lines over uneven floors.
Step 2: Measuring and 45-Degree Miter Cutting — Measure wall segments accurately and transfer dimensions to the border profile. Execute 45-degree corner joints and 30-degree bevel joints for straight length extensions using a fine-toothed miter saw. Duration: 25–30 minutes. Common Mistake: Cutting miter angles in the wrong direction for internal versus external corners.
Step 3: Polyurethane Adhesive Application — Apply continuous beads of polyurethane mounting adhesive along the rear bonding channels and joint cross-sections of the profile. Never use silicone adhesive. Duration: 10–15 minutes. Common Mistake: Applying insufficient adhesive on cut joint edges, leading to hairline cracks after thermal expansion.
Step 4: Positioning and Mandatory Screw Fixing — Press the border molding firmly against the wall alignment line. Drive mechanical screws through pre-drilled pilot holes into wall plugs spaced every 40 to 60 cm for secure anchorage. Duration: 30–40 minutes. Common Mistake: Relying solely on adhesive without mechanical screw fixing, causing profile sagging before curing.
Step 5: Joint Filling with Putty — Fill screw countersinks and profile connection joints using specialized joint putty. Remove excess material immediately using a flexible spatula. Duration: 20–25 minutes. Common Mistake: Applying thick coats of putty without wiping excess material, increasing sanding labor.
Step 6: Sanding and Surface Levelling — Allow the putty to cure completely according to manufacturer instructions. Sand filled joints flush with the profile surface using fine grain 180-220 sandpaper. Duration: 15–20 minutes. Common Mistake: Using coarse sandpaper below 120 grit, which gouges the rigid polyurethane body and damages factory priming.
Step 7: Priming and Double-Coat Final Painting — Apply an optional acrylic spot primer on filled joints if needed. Finish with two coats of water-based interior paint or UV-resistant exterior paint depending on application location. Duration: 40–60 minutes (excluding drying intervals). Common Mistake: Using standard interior paint on outdoor installations, causing premature UV discoloration.

Étape 2 : Découpe d'Onglet à 45 Degrés dans les Angles

Sciez les profilés en boîte à onglets en appliquant une marge de coupe de 10% pour des angles extérieurs impeccables.

Étape 3 : Double Encollage et Fixation Mécanique

Déposez des cordons continus de colle structurelle colle de montage à base de PU (séchage en environ une heure) et ancrez avec des vis inox masquées au mastic.

Étape 4 : Joint d'Étanchéité Supérieur et Peinture UV

Réalisez un cordon d'étanchéité supérieur anti-goutte, poncez grain 180-220 et appliquez une peinture pour façades avec filtre UV sur l'apprêt primaire acrylique blanc monocomposant sous -100 °C / +80 °C. Imperméable (inférieure à 1 %). Devis valables 7 jours, livraison départ usine départ usine.