About this video

• Video Title: Série Reforma Pesada: Técnicas Avançadas de Selagem e Vedação: Como Prevenir Fissuras e Infiltrações
• Channel: Obra é compromisso | por Obramax
• Speakers: Luciano, Leonardo, Thiago
• Duration: 01:02:46

Overview

This video from Obramax's "Obra é compromisso" channel features Luciano and guest engineer Leonardo from Viapol, discussing advanced techniques for sealing and waterproofing to prevent cracks and infiltrations in construction and renovation projects. They cover surface preparation, various waterproofing products, application methods, and common mistakes to avoid.

Key takeaways

• Surface Preparation is Crucial: Before applying any waterproofing, surfaces must be properly prepared, which includes treating cracks and fissures.
• Preventing Cracks: Fissures of retraction in plaster can be prevented by using plasticizers like Viapol's Viacal instead of excessive water in the mortar mix.
• Laje Waterproofing: Proper curing of concrete slabs is essential to prevent shrinkage cracks. For existing cracks, polyurethane sealant is recommended.
• Product Selection: Different areas require different waterproofing solutions. Viapol offers various products, including cementitious (Via Plus line), liquid membranes (Vedalage line), and asphaltic membranes, each suited for specific applications like walls, slabs, reservoirs, and foundations.
• Key Application Principles: Proper application involves understanding the direction of water pressure, ensuring correct slope (caimento) for drainage, and preparing the surface by cleaning it thoroughly and rounding corners where appropriate.
• Manta Asfáltica Use: Asphaltic membranes are generally not suitable for sun-exposed areas unless protected by mechanical covering or if they are aluminum-coated and traffic-free.
• Drywall Waterproofing: Viapol's Via Plus 7000 is recommended for waterproofing drywall in wet areas like bathrooms and kitchens.
• Common Mistakes: Lack of proper slope on slabs is a frequent error leading to water pooling and subsequent damage. Applying waterproofing to unprepared or dirty surfaces also leads to failure.