Which material is considered the best for waterproofing foundations?

Rubber membranes are highly regarded for waterproofing foundations due to their flexibility, durability, and excellent barrier properties against water. They are typically used in below-grade applications because they effectively seal out moisture while accommodating movements in the structure, such as settling or expansion. The installation of rubber membranes creates a continuous layer that minimizes potential weak points where water could seep through.

In addition, these membranes can be installed in various weather conditions and are resistant to many environmental factors, making them a reliable choice for long-term waterproofing solutions. This makes rubber membranes particularly suitable for areas where water intrusion is a concern, such as basements and retaining walls. Their ability to provide a seamless and robust protection system distinguishes them from options like poured concrete, tar paper, and fiberglass, which may not offer the same level of reliability or flexibility.