Membrane Definition
A membrane is a waterproofing material used to protect buildings against water and moisture. It is generally produced in roll form and applied in many areas, from roofs to foundations. Membrane systems are one of the most critical insulation solutions for ensuring long-lasting building durability.
Membranes:
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Prevent water leakage
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Protect concrete and reinforcement steel
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Improve structural durability
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Prevent moisture and dampness
In modern construction, membrane systems form the foundation of waterproofing applications.
Where Are Membranes Used?
Membrane systems are used in all structural elements exposed to water.
Foundation and Basement Waterproofing
Applied using a waterproofing “box system” to protect against groundwater and moisture.
Terraces and Roofs
One of the most common applications against rain and snow.
Balconies
Used to ensure waterproofing and prevent leakage.
Wet Areas
Applied under tiles in bathrooms, toilets, and kitchens.
Parking Areas and Tunnels
Provides resistance against underground water pressure.
Water Tanks and Swimming Pools
Used for internal waterproofing applications.
How Is a Membrane Applied?
Membrane application may vary depending on the product type, but generally follows these steps:
1. Surface Preparation
The surface is cleaned and made smooth.
2. Primer Application
A primer is applied to create strong adhesion between the surface and the membrane.
3. Membrane Installation
Membrane rolls are laid on the surface with proper overlaps.
4. Bonding / Welding
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Bituminous membranes are applied using a torch
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PVC and TPO membranes are heat-welded
5. Protection Layer
Especially in foundation applications, the membrane is protected with drainage boards or protective concrete.
Proper detailing is essential for high performance.
Types of Membranes and Materials
Membranes are classified according to their raw materials.
Bituminous Membrane
The most widely used type. Available in APP and SBS modified versions.
PVC Membrane
Lightweight, durable, and long-lasting. Commonly used for large roof areas.
TPO Membrane
Environmentally friendly and highly resistant to UV rays.
EPDM Membrane
A synthetic rubber membrane with high flexibility and long service life.
Liquid Membrane
Brush or roller-applied waterproofing systems.
Membrane Prices (2026)
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Bituminous membrane: 120 – 300 TL / m²
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PVC membrane: 250 – 600 TL / m²
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TPO membrane: 300 – 700 TL / m²
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EPDM membrane: 400 – 900 TL / m²
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Liquid membrane: 200 – 500 TL / m²
Prices may vary depending on brand, thickness, and application details.
Frequently Asked Questions
What is the function of a membrane?
It protects buildings from water and moisture and extends their lifespan.
Which membrane is the best?
It depends on the application. Bituminous membranes are preferred for foundations, while PVC or TPO membranes are used for roofs.
How long does a membrane last?
With proper material and correct application, it can last 20–30 years.
Membrane or liquid waterproofing – which is better?
Membranes are better for large surfaces, while liquid systems are more suitable for detailed areas.
How long does membrane application take?
Depending on project size, it may take from a few days to several weeks.
Conclusion
Membrane systems are one of the most important components of waterproofing, and when applied correctly, they ensure long-term structural protection.
Haydar Boz Yalıtım, operating in bituminous membranes, PVC and TPO systems, waterproofing solutions, and construction chemicals in Turkey, provides professional solutions with a wide product range and technical expertise for construction projects.