Waterproofing membranes are very vital in the processes of construction since they prevent infiltration of water into a structure. They come in different types,
with each type suitable for a particular application.
The main types are:
1. Sheet-Based Membranes:
EPDM—Ethylene Propylene Diene Monomer: Synthetic rubber membrane, extremely durable with high flexibility and ultraviolet radiation resistance. It is majorly
used on roofs and generally areas directly exposed.
TPO — Thermoplastic Olefin: A heat weldable, single-ply membrane with good durability and energy efficiency. It is widely applied for roofing purposes.
PVC — Polyvinyl Chloride: This is a flexible plastic membrane, highly durable, resistant to chemicals, and very popular in roofing and waterproofing applications.
Bituminous Membranes: The asphalt-based sheets are reinforced with such materials as fiberglass or polyester. They are widely used on roofs, foundations, and other
areas requiring substantial waterproofing.
2. Liquid-Applied Membranes:
First, polyurethane: a liquid membrane with very good flexibility and mechanical properties. Applied on roofs, balconies, and terraces. Second, acrylic: a water-based
membrane having good UV resistance. They are largely used on roofs and other areas exposed to sunlight.
Cementitious Waterproofing: These membranes are manufactured from a mixture of cement with other compounds. They are mostly used in internal wet areas
like bathrooms, water tanks, and basements.
3. Self-Adhesive Membranes:
Bitumen-Based: Such membranes have a self-adhesive backing that makes the application easy. They are used mostly for waterproofing basements, roofing, and
many more applications where ease of installation is paramount.
4. Torch-On Membranes:
APP (Atactic Polypropylene) Modified Bitumen: The membrane is applied using a heat torch to weld the membrane onto the surface, showing good resistance to UV
radiation, and suitable for roofing applications.
SBS (Styrene-Butadiene-Styrene) Modified Bitumen: Another torch applied membrane, it is known for its flexibility at low temperatures, lending it to be ideal in cold
climates.
