Montaje de Frontones y Coronas Paso a Paso

Manual profesional sobre el aplomado de remates de dintel, fijación mecánica oculta y estanqueidad contra el agua de lluvia.

La correcta colocación de los frontones y coronas de poliuretano asegura una alineación simétrica perfecta sobre los huecos de fachada y una protección duradera.

Paso 1: Centrado y Trazado con Nivel Láser

1. Substrate Preparation and Inspection — Clean the mounting surface thoroughly to remove dust, oil, loose plaster, or moisture. The installation substrate must be entirely dry and structurally sound. Estimated Time: 15-20 minutes per section. Common Mistake: Applying adhesive over loose dust or damp masonry, which prevents proper chemical bonding.
2. Measurement and Miter Saw Cutting — Measure the target opening accurately and transfer dimensions to the polyurethane profile. Cut the ends using a miter saw set to a precise 45-degree angle for corner or return joints. Estimated Time: 10-15 minutes per profile. Common Mistake: Cutting without accounting for the profile depth, leading to misaligned miter joints.
3. Polyurethane Adhesive Application — Apply a continuous bead of polyurethane (PU) assembly adhesive along the rear contact surfaces and joint edges. Never use silicone. Estimated Time: 5-10 minutes per profile. Common Mistake: Using silicone sealant instead of dedicated polyurethane adhesive, causing bond failure.
4. Mounting and Mandatory Mechanical Fastening — Press the crown firmly against the surface. Drill pilot holes through designated recessed points and secure the piece with dowels and screws into the wall structure. Estimated Time: 10-15 minutes per anchor point. Common Mistake: Skipping mechanical screw anchoring and relying only on adhesive.
5. Joint Filling and Surface Sanding — Fill screw recesses and profile seam joints with technical joint putty. Once cured, sand the joints smooth using grano 180-220 sandpaper until flush. Estimated Time: 20-30 minutes (plus curing time). Common Mistake: Using coarse sandpaper (below 180 grit), which scratches the polyurethane surface.
6. Coating and Final Painting — Apply an optional coat of primer over filled joints, followed by two topcoats of quality paint. Exterior installations require UV-resistant outdoor paint. Estimated Time: 1-2 hours (excluding drying time between coats). Common Mistake: Omitting UV-resistant paint on exterior facade installations.

Paso 2: Aplicación del Adhesivo Estructural

Aplique cordones continuos de adhesivo de poliuretano adhesivo de montaje a base de PU en la cara posterior de la corona con densidad 150-220 kg/m³ (objetivo de producción ~160 kg/m³) y presione contra el muro.

Paso 3: Fijación Mecánica Superior y Curado

Coloque tornillos con taco de expansión en la pestaña superior oculta para fijar la pieza mientras fragua el adhesivo. Tiempo de curado: aproximadamente una hora.

Paso 4: Sellado de Estanqueidad y Pintura UV

Selle la junta superior con masilla elástica impermeable para evitar filtraciones de agua de lluvia. Lije grano 180-220 y pinte con pintura de fachada con filtro UV sobre la imprimación imprimación acrílica blanca monocomponente en temperaturas -100 °C / +80 °C. Inmune a la humedad (inferior al 1%).