Inverted Insulated Roof

Inverted roof construction XPS A CFC/HCFC free extruded polystyrene insulation, for use above Asphaltech in all inverted roof specifications. XPS is resistant to water and will provide long term protection to the Asphaltech waterproofing system.

  1. 40mm Paver or tile on a tile jack. 88.8 kg/m2
  2. Geotextile sheet 1.7mm thick, 0.2kg/m2
  3. Extruded polystyrene Insulation 100mm thick 3.3Kg/m2
  4. Asphaltech mastic asphalt 20mm thick (2X10mm coats) 42.92Kg/m2
  5. Separation layer 3mm thick 1.9kg/m2
  6. Concrete deck
20 Year System Guarantee

The inverted roof is a flat roof construction and its main feature is that, unlike in conventional flat roof designs, the thermal insulation is laid above the Polymer Modified Mastic Asphalt.

Any type of deck or ballast can be selected as a finishing surface such as gravelled or pebbled roofs, paved terrace roofs, green roofs.

  • Protects and insulates the roof structure
  • Monolithic, an aesthetic seamless finish
  • Unbonded, allowing movement between structure and materials
  • Can be laid at falls lower than 1.80
  • A properly designed & installed mastic asphalt system will last 60 years
  • Traditional mastic asphalt but with added polymers to improve flexibility & durability
  • With 20 years warranty for supply and installation
  • All in accordance with ISO 9001:2008

Mastic Asphalt Systems

Inverted Insulated Roof System

Asphaltech inverted insulated roof X-sectional detail

The inverted roof is a flat roof construction and its main feature is that, unlike in conventional flat roof designs, the thermal insulation is laid above the Polymer Modified Mastic Asphalt, as a result the dew point is taken outside the building, eliminating any possible condensation forming inside the roof structure. Any type of deck or ballast can be selected as a finishing surface such as gravelled or pebbled roofs, paved terrace roofs, green roofs or a combination including planters.

U-value guidance
Technical information and design can be arranged to suit your needs.

Inverted Insulated Roof System

Fabric Apartments, Onehunga

Fabric Apartments, Onehunga