Come montare davanzali e gocciolatoi in poliuretano : Guida

Protezione totale dall'acqua piovana : Come montare davanzali con pendenza e gocciolatoio in poliuretano per preservare gli intonaci esterni.

Il montaggio dei davanzali con gocciolatoio in poliuretano assicura il perfetto deflusso dell'acqua piovana lontano dalla muratura di facciata.

Pendenza di Scolo Verso l'Esterno (2–3 %)

Step 1: Substrate Inspection and Surface Preparation — Clean the installation area thoroughly using a dry wire brush and dust blower to remove loose debris, mortar flashes, or grease. Ensure the mounting substrate is completely dry and structurally sound. Estimated Time: 15 minutes. Common Error: Applying adhesive over wet or dusty rendering, which causes bond failure.
Step 2: Measurement and 45-Degree Miter Cutting — Measure the window opening width precisely, adding required end-cap overhangs. Cut the polyurethane profile ends at a clean 45-degree miter angle using a fine-toothed miter saw. Estimated Time: 20 minutes. Common Error: Cutting at high blade speeds that melt the polyurethane edge rather than shearing it cleanly.
Step 3: Polyurethane Adhesive Application — Apply continuous 8 mm beads of polyurethane (PU) assembly adhesive along the back contact surface and joint faces. Do not use silicone sealants under any circumstances. Estimated Time: 10 minutes. Common Error: Using standard silicone or applying spot dabs instead of continuous adhesive beads.
Step 4: Profile Positioning and Mechanical Fastening — Press the sill profile firmly onto the substrate, verifying a forward drainage slope of at least 5 degrees with a spirit level. Drive stainless steel screws with wall plugs through countersunk holes spaced 40-50 cm apart. Estimated Time: 25 minutes. Common Error: Omitting mechanical screws and relying solely on adhesive.
Step 5: Joint Filling and grana 180-220 Sanding — Fill countersunk screw heads and 45-degree joint seams with flexible polyurethane putty. Allow the putty to cure completely, then sand flush using grana 180-220 sandpaper. Estimated Time: 30 minutes (excluding curing time). Common Error: Sanding before the joint putty has fully cured, causing indentation marks.
Step 6: Spot Priming and UV Topcoat Painting — Apply an acrylic primer over sanded joint areas if raw polyurethane is exposed. Finish the complete sill with two coats of high-grade UV-resistant exterior paint. Estimated Time: 40 minutes (plus dry times). Common Error: Using interior paint or skipping UV-resistant coatings on exterior surfaces.

Fase 1 : Taglio a Misura con Sporgenze Laterali (Tempo : 15 min)

Tagliate l'asta da 2400-2440 mm calcolando 2–3 cm di sporgenza oltre i montanti verticali con sfrido 10%.

Fase 2 : Incollaggio Continuo con Adesivo PUR (Tempo : 25 min)

Stendete cordoli continui di adesivo adesivo di montaggio a base PU (indurimento in circa un’ora) sul sottofinestra in densità compatta 150-220 kg/m³ (obiettivo di produzione ~160 kg/m³).

Fase 3 : Sigillatura dei Giunti e Tinteggiatura UV (Tempo : 20 min)

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