How to Use Bitumen Felt Base Mat in Waterproofing Projects

WATERPROOF MEMBRANE BASE MAT PROFESSIONAL SUPPLIER

How to Use Bitumen Felt Base Mat in Waterproofing Projects

Bitumen felt base mat plays a vital role in modern waterproofing systems. It serves as the foundational layer in the production of bitumen-based waterproof membranes, offering strength, flexibility, and durability. This article will guide you through the correct usage of bitumen felt base mat in practical applications—from preparation to installation.

📌 What is Bitumen Felt Base Mat?

Bitumen felt base mat is a nonwoven material, usually made from fiberglass, polyester, or a composite, that acts as a reinforcement carrier for bitumen membranes. It’s the “skeleton” that provides stability and tensile strength for roofing and foundation waterproofing systems.

🧰 Step-by-Step Guide: How to Use Bitumen Felt Base Mat

1. Surface Preparation

Before applying any membrane:

Clean the substrate thoroughly—remove dust, oil, moisture, or loose particles.
Ensure the surface is smooth, dry, and structurally sound.

✅ Tip: Use a primer to improve adhesion between the surface and bitumen-based materials.

2. Primer Application (Optional but Recommended)

Use a bitumen-based primer to increase bonding between the base mat and the concrete or wood surface.
Apply with a brush, roller, or spray.
Wait for the primer to dry completely before laying the felt base mat.

3. Heating the Bitumen Layer

Use a torch or hot-melt applicator to evenly heat the bitumen material.
Once melted and tacky, it is ready for the felt base mat to be laid.

🔥 Caution: Always follow safety guidelines when using an open flame or heating equipment.

4. Laying the Felt Base Mat

Roll out the base mat carefully over the molten bitumen, pressing it firmly to avoid air bubbles or wrinkles.
Use a roller or heavy tool to ensure complete adhesion and remove trapped air.

5. Overlapping and Sealing

Overlap each sheet by at least 8–10 cm on the sides and 15 cm at the ends.
Heat the overlap area to fuse both layers, creating a watertight seal.

6. Finishing Touches

Apply an additional protective layer if needed (e.g., mineral-surfaced cap sheet or aluminum foil).
Inspect all seams, edges, and overlaps to ensure consistent bonding.

🔍 Common Applications

Flat Roof Waterproofing
Underground Foundation Protection
Tunnel and Bridge Deck Sealing
Balcony and Terrace Membranes

🏁 Conclusion

Using bitumen felt base mat correctly is essential for building a long-lasting, waterproof barrier. Its performance relies heavily on surface preparation, correct installation, and proper sealing techniques. Whether you’re working on a residential rooftop or an industrial structure, this foundational material ensures your project stays dry and secure.