Inverted Roof Insulation

An inverted roof also known sometimes as a protected membrane or pmr roof uses the same materials as a conventional roof but places insulation on the top of the membrane.

Inverted roof insulation.

Inverted roofs have their waterproofing layer beneath the insulation instead of above it as in other forms of roofing. An inverted roof is a form of flat roof where the waterproof layer is beneath the insulation rather than above it. In this issue the investigations team explains how inverted roofs work outlines their benefits warns of a possible cause of problems and describes an unusual investigation. Inverted roof designing buildings wiki share your construction industry knowledge.

An inverted roof also referred to as a protected membrane or upside down roof is form of flat roof in which the waterproofing layer is beneath the thermal insulation rather than above it. Inverted roofs have their waterproofing layer beneath the insulation instead of above it as in other forms of roofing. Jablite premium inverted roof insulation boards in 200 300 and 200 grades have adequate resistance to the loads associated with light maintenance traffic on roofs and to pedestrian foot traffic on balconies and roof terraces. It is the insulation for protected membrane flat and green roofs.

An inverted roof is quite simply where the waterproofing layer is installed over the structural deck rather than over the insulation. Our range of inverted roof insulation has high compressive strength and increased resistance to water absorption. Inverted roof insulation our range of high performance rigid extruded polystyrene insulation products are suitable for use in a range of inverted roofs including green roofs and protected membrane flat roofs. Jablite supplies insulation boards in a range of grades suitable for all flat roof applications.

Insulation boards are loose laid on top of the waterproof usually a liquid applied membrane and then weighted down with paving slabs or gravel ballast. Rigid extruded polystyrene insulation has minimal water absorption due to its closed cell structure. The table below shows thickness of jablite inverted roof insulation range required to achieve u values from 0 25 w m k down to 0 10 w m k. Invented by dow in the late 1960 s an inverted roof system uses dupont styrofoam brand xps insulation to protect the membrane helping improve the performance and.