Protected Membrane Roof

Definition

A protected membrane roof is a membrane roof assembly in which the thermal insulation lies above the waterproof membrane.

Purpose

The purpose of a protected membrane roof is to shield the waterproof membrane from temperature extremes and physical damage, thereby extending its lifespan and improving the roof’s overall performance.

Examples of Use

• Commercial buildings use protected membrane roofs to enhance durability and energy efficiency.
• Green roofs often incorporate protected membrane systems to support vegetation while protecting the underlying structure.
• Industrial facilities with extensive rooftop equipment benefit from the added protection against mechanical damage.

Related Terms

• Inverted Roof: Another term for a protected membrane roof, indicating the insulation is above the waterproofing layer.
• Insulation: Material used to reduce heat transfer and improve energy efficiency.
• Waterproof Membrane: A layer of material that prevents water penetration.

Notes

Protected membrane roofs are particularly effective in harsh climates and high-traffic areas, where the roof membrane needs additional protection.