Come montare archi e profili curvi in poliuretano : Guida

Montaggio perfetto di aperture centinate : Come unire semiarchetti curvi in poliuretano con chiavi di volta e montanti verticali senza fessure.

Il montaggio degli archi e delle cornici curve in poliuretano si realizza assemblando i settori curvi con collanti strutturali e raccordi a filo.

Strumenti e Rilevazione dell'Arco Esistente

Step 1: Surface Inspection and Preparation — Ensure the substrate is clean, dry, level, and free of loose dust or oil. Duration: 15-30 minutes. Common mistake: Applying polyurethane adhesive over unstable plaster or damp wall surfaces, causing bond failure.
Step 2: Arc Template and Radius Measurement — Measure the span and height of the archway, then trace a 1:1 scale template on cardboard or directly on the wall to guide segment placement. Duration: 30-45 minutes. Common mistake: Relying on estimates instead of measuring multiple arc points, leading to visible gaps between profile segments.
Step 3: Miter Cutting and Segment Dry-Fitting — Cut the polyurethane arch profiles at precise 45-degree miter angles using a fine-toothed saw, then dry-fit all segments against the marked template. Duration: 30-60 minutes. Common mistake: Cutting without verifying the correct angle orientation for curved profile geometry.
Step 4: Adhesive Application and Profile Placement — Apply continuous beads of polyurethane (PU) assembly adhesive along profile contact surfaces and joint faces; do not use silicone. Press segments firmly onto the wall substrate. Duration: 20-40 minutes. Common mistake: Using silicone sealants, which leads to joint separation and failure.
Step 5: Mechanical Anchoring with Screws — Drill pilot holes through the polyurethane profile into the wall substrate and drive screws into wall plugs every 300-400 mm along the arc. Duration: 30-45 minutes. Common mistake: Omitting mechanical fasteners and relying solely on adhesive bonding.
Step 6: Joint Puttying and Sanding — Fill screw countersinks and profile joints with specialized putty. Allow it to dry completely, then sand smooth using grana 180-220 sandpaper. Duration: 45-60 minutes (excluding drying time). Common mistake: Using coarse sandpaper that gouges the factory-primed polyurethane surface.
Step 7: Primer Touch-Up and Final Painting — Apply an optional touch-up primer over sanded joints, followed by two coats of UV-resistant paint for exterior projects or quality interior paint. Duration: 1-2 hours. Common mistake: Applying non-UV resistant paint outdoors, resulting in discoloration and weathering.

Fase 1 : Verifica del Raggio e Taglio di Battuta (Tempo : 20 min)

Controllate l'allineamento della curva muraria e tagliate i semiarchetti calcolando lo sfrido 10% a -100 °C / +80 °C.

Fase 2 : Applicazione Adesivo PUR e Chiave di Volta (Tempo : 30 min)

Stendete cordoli di adesivo adesivo di montaggio a base PU (indurimento in circa un’ora) e posizionate i semiarchetti uniti al centro dalla chiave di volta in densità 150-220 kg/m³ (obiettivo di produzione ~160 kg/m³).

Fase 3 : Stuccatura dei Raccordi Curvi e Tinteggiatura (Tempo : 25 min)

Levigate le giunzioni con carta grana 180-220 (grana 180–220) e rifinite con pittura per esterni su primer primer acrilico bianco monocomponente. idrorepellente (inferiore all’1%). Offerte 7 giorni, consegna franco fabbrica.