Come montare facciate effetto prekast in poliuretano : Guida

Posa rapida di grandi modanature di facciata : Come installare profili effetto cemento prefabbricato in poliuretano senza autogrù pesanti.

Il montaggio dei profili di facciata effetto cemento prekast in poliuretano permette di realizzare maestosi cornicioni esterni con posa manuale leggera.

Avvertenza Statica : Rivestimenti Leggeri Non Portanti

Step 1: Substrate Preparation and Marking — Inspect the wall surface to confirm it is dry, clean, structurally sound, and free from loose paint or dust. Mark baseline reference lines using a chalk line and spirit level to align all profiles correctly. Duration: 1-2 hours per 15 m². Common Error: Mounting profiles onto damp, uncleaned, or crumbling masonry walls.
Step 2: Measuring and Miter Cutting (45 Degrees) — Measure the wall sections carefully and cut profile edges at exact 45-degree angles for corner joints using a high-speed miter saw equipped with a fine-toothed blade. Duration: 15-30 minutes per element. Common Error: Cutting at incorrect angles, creating wide joint gaps that are difficult to seal.
Step 3: Polyurethane Adhesive Application — Apply a continuous bead of polyurethane mounting adhesive along the back contact surfaces and cross-sectional joint faces of the profile. Duration: 5-10 minutes per profile. Common Error: Using standard silicone or acrylic caulk instead of structural polyurethane adhesive.
Step 4: Mechanical Fixation with Screws and Anchors — Press the profile firmly against the marked layout line. Drill countersunk holes through the profile into the wall and secure mechanical screws into masonry anchors. Mechanical fastening is mandatory. Duration: 10-15 minutes per element. Common Error: Relying exclusively on adhesive without installing mechanical screws.
Step 5: Joint Filling and Putty Application — Fill all screw head indentations and profile seams with exterior-grade joint putty using a flexible putty knife to achieve a continuous surface. Duration: 30-45 minutes per section. Common Error: Underfilling joint gaps, leading to visible seam lines after painting.
Step 6: Sanding the Joint Surface — Once the joint putty has fully cured, sand the treated areas smooth using grana 180-220 sandpaper until the seams blend flush with the profile. Duration: 15-20 minutes per joint. Common Error: Using coarse sandpaper below 120 grit, which scratches the factory primer layer.
Step 7: Priming Touch-Ups and UV-Resistant Painting — While profiles arrive factory-primed, an optional coat of exterior primer can be applied to sanded areas. Apply at least two coats of high-grade UV-resistant exterior paint to protect the material from sunlight. Duration: 24 hours total curing time between coats. Common Error: Using interior paint or skipping UV-resistant exterior topcoats.

Fase 1 : Tracciamento Laser e Tagli d'Angolo (Tempo : 20 min)

Tracciate gli allineamenti di facciata e tagliate le aste da 2400-2440 mm calcolando lo sfrido 10% per le variazioni a -100 °C / +80 °C.

Fase 2 : Incollaggio PUR e Tassellatura Inox (Tempo : 35 min)

Stendete cordoli continui di adesivo adesivo di montaggio a base PU (indurimento in circa un’ora) sul retro in densità solida 150-220 kg/m³ (obiettivo di produzione ~160 kg/m³) e inserite tasselli inox.

Fase 3 : Sigillatura dei Giunti e Finitura Cemento (Tempo : 25 min)

Levigate i giunti con carta grana 180-220 (grana 180–220) e applicate pittura silossanica minerale su primer primer acrilico bianco monocomponente. idrorepellente (inferiore all’1%). Offerte 7 giorni, consegna franco fabbrica.