This article introduces and compares the most popular types of single ply roofing membranes used in the UK, setting out their different characteristics, advantages and disadvantages.

How can you tell the difference between single ply roofing products, what might be their benefits and disadvantages in terms of cost, sustainability and reliability? As a designer and supplier of roofing systems, AccuRoof recommends a range of single ply roofing membranes, different materials and different brands, depending on the application, project size and performance requirements. We use our extensive experience in differentiating between waterproofing alternatives to identify the best products for any roofing situation.

Here is our introduction to the main types of single ply roofing membranes. Next week we’ll look in more detail at the key factors that determine which membrane is best for your project.

What is Single Ply Roofing Membrane?

Single ply is a flat, synthetic polymer based roofing material that, as the name suggests, provides a waterproofing layer in a single sheet. Usually supplied in rolls, the material is either entirely homogeneous or contains a reinforcement layer. Sealed at the joints with heat, adhesive or mechanical means, it can be adhered, mechanically fixed and/or ballasted into flat, pitched or green roof systems.

Single ply roofs are lightweight, flexible, cost effective, swift to install and safe, which makes them increasingly popular for both new build and refurbishment projects.

Benefits of Single Ply Membranes

• Over 50-year track record
• A well-managed sector with its own Trade Association (SPRA)
• Suitable for new build and refurbishment applications
• Suitable for flat, wave form, cupolas etc
• Low capital cost and cost in use
• Safe, rapid and clean installation
• Some products available in a wide range of RAL colours
• Some products suitable for cost-effective alternative to metal roofing
• Simple to repair and modify
• Suitable for photovoltaic system installation
• Variety of sustainability characteristics including zero life cycle impact.

Types of Single Ply Roofing Membrane

There are five main types of Single Ply roofing membrane available in the UK. They are:

1. PVC (Poly Vinyl Chloride)
2. EPDM (Ethylene Propylene Diene Monomer)
3. TPO (Thermoplastic Polyolefin)
4. TPE, (Thermoplastic Polyolefin Elastomer) and
5. PIB (Polyiso Butylene)