Ultimate Guide: How to choose the ideal waterproofing

In Medellin's dynamic climate, a poor choice in the waterproofing system can mean costly repairs in less than two years. This guide will help you understand which system your property actually needs.

1. Asphalt Membrane: Structural Strength

Asphalt membrane remains king for walkable terraces and areas where tile will be installed later. Its main advantage is that it creates a very thick physical barrier (3mm to 4mm).

• Ideal for: Building terraces, social areas, and flat concrete slabs.
• Lifespan: 5 to 10 years depending on the finish (aluminum or gravel).
• Technical note: Requires expert application with a torch to ensure overlaps are fully fused.

2. Liquid Polyurethane: The Monolithic Solution

Liquid polyurethane membranes have gained ground in Medellin for their versatility. By being applied as a continuous coating, they eliminate the weakest point of any waterproofing: the joints.

This material is highly elastic, allowing it to "accompany" the expansion and contraction movements of the building without breaking.

3. Acrylic Systems: Solar Reflection and Maintenance

For sheet metal or fiber cement roofs, acrylic systems reinforced with polyester fabric are excellent. In addition to waterproofing, they have thermal properties: they reflect solar radiation, lowering the interior temperature by up to 4°C.

---

How to know which one is right for you?

Before buying any material, consider these three factors:

1. Traffic: Are people going to walk there? If so, use high-traffic Asphalt or Polyurethane.
2. Surface condition: Are there many cracks? Polyurethane is better for sealing micro-cracks.
3. Budget vs. Durability: Cheap turns out expensive. A 5-year warranty will save you three one-year maintenances.