When selecting a PVC single ply membrane for your flat roofing project, understanding the differences between available options is essential for ensuring the best performance, durability, and ease of installation.
Here we compare the three popular Memtec PVC single ply membranes stocked at our store: Memtec EMF (Mechanically Fixed), Memtec EBM (Adhesive Bonded), and Memtec PBM-FB (Fleece-Backed). Each membrane offers unique features suited to different roofing needs.
| Product Name | Fixing Method | Backing | Thickness | Colour | Key Features | Best For |
|---|---|---|---|---|---|---|
| Memtec EMF | Mechanically Fixed | Smooth | 1.5mm | Dark Grey | High wind uplift resistance, fast installation | Large commercial roofs, exposed windy locations |
| Memtec EBM | Adhesive Bonded | Smooth | 1.5mm | Dark Grey | No mechanical fasteners, smooth finish | Refurbishments, sensitive substrates, aesthetics |
| Memtec PBM-FB | Adhesive Bonded (Fleece-Backed) | Fleece | 1.5mm | Dark Grey | Enhanced puncture resistance, extra cushioning | Overlaying existing roofs, uneven substrates |
Memtec EMF PVC Single Ply Membrane (Mechanically Fixed)
- Installation: This membrane is designed for mechanical fixing, meaning it is secured to the roof deck using fasteners and plates.
- Advantages: Mechanically fixed systems are known for their speed of installation and excellent resistance to wind uplift, making them ideal for large, open, or exposed roofs.
- Best Use: Commercial buildings, new builds, or areas where wind resistance is a priority.
- Considerations: The presence of fasteners may be visible on the finished surface, and additional detailing is required around penetrations and edges.
Memtec EBM PVC Single Ply Membrane (Adhesive Bonded)
- Installation: This version is adhered directly to the substrate using a suitable adhesive, resulting in a smooth, uninterrupted appearance.
- Advantages: Adhesive bonding eliminates the need for mechanical fasteners, reducing potential thermal bridging and providing a cleaner aesthetic. Ideal for projects where appearance is important or where the substrate cannot be penetrated.
- Best Use: Refurbishment projects, roofs with sensitive insulation, or when a seamless look is required.
- Considerations: Requires a clean, dry, and compatible substrate for proper adhesion. Installation can be more weather-dependent compared to mechanical fixing.
Memtec PBM-FB Fleece-Backed PVC Single Ply Membrane
- Installation: This membrane is also typically adhered, but it features a fleece backing that provides additional benefits.
- Advantages: The fleece backing offers enhanced puncture resistance, improved acoustic and thermal performance, and helps to mask minor imperfections in the underlying surface. It’s especially suitable for overlaying existing roofs or uneven substrates.
- Best Use: Roof refurbishments, overlaying old membranes, or situations where extra cushioning and durability are needed.
- Considerations: Slightly heavier and thicker due to the fleece, which may require stronger adhesives and careful handling during installation.
How to Choose the Right Memtec PVC Membrane
- For Speed and Wind Resistance: Choose Memtec EMF for large, open, or windy sites where fast installation and high uplift resistance are priorities.
- For Seamless Finish and Sensitive Substrates: Opt for Memtec EBM where a smooth appearance is important, or where the deck cannot be penetrated.
- For Refurbishments and Extra Protection: Select Memtec PBM-FB when overlaying existing roofs, dealing with uneven surfaces, or when extra puncture resistance is needed.
Each membrane shares core benefits of PVC single ply such as flexibility, durability, and weather resistance-but the fixing method and backing make a significant difference in performance and suitability for specific projects.
For further advice or to discuss your specific requirements, contact our team-we’re here to help you make the best choice for your flat roof.
