Protan Inverted Roofing Systems

Inverted roofs are an insulated, ballasted roof structure with the membrane under the insulation.

Membrane under the insulation

The membrane, insulation and ballast are installed on top of the load-bearing structure. To minimise cold bridging and foreign bodies penetrating the layer of insulation and then the membrane, the insulation boards are installed using tongue and groove or in two staggered layers. A separation layer is laid on top of the insulation before the ballast to provide protection. A migration barrier has to be used to prevent contact between the insulation and membrane. The insulation boards are ballasted so as to withstand wind forces and any uplift.


Protan G Membrane

G membrane that is glass fibre reinforced for gravel ballasted, inverted and green roofs. It can withstand extreme climates and microbe attack.

Protan GG Membrane

green roofs and car parks can be made with Protan GG membran.It is root resistant and has high load and pressure bearing capacity.

Protan Prefabricated details

Protan has one of the widest ranges of prefabricated details on the market, including details for corners, pipes and upstands.