Inverted Roof Insulation Thickness

Benefits of inverted roofs.

Inverted roof insulation thickness.

The table below shows average 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. Typical u values. 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. This means that the insulation should be highly resistant to water absorption for example an extruded polystyrene based product which will not be affected by water or repeated freeze thaw cycles.

Condensation the inverted roof construction can greatly reduce the. However this increase can be substantially reduced by using the roofmate mink system which helps to minimise the heat loss due to rainwater cooling and therefore the amount of insulation required. The calculation is based on an inverted roof construction of 150mm reinforced concrete deck hot melt waterproofing jablite inverted roof insulation jablite filter membrane drainage factor ƒ x 0 001 and average rate of precipitation p 3 000 mm day. 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.

The great benefit of inverted roofs is that the insulation protects the membrane from extremes of weather such as frost uv exposure and the expansion and contraction that comes about from summer winter temperature cycles which can be as much as 80 c on some roofs. Insulation thickness in order to meet bs en iso 6946. 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.