Conventional Roof Insulation

Conventional Roof Insulation is the most widely used and reliable solution for accessible and non-accessible flat roofs. In this system, the waterproofing membrane is installed above the thermal insulation layer, thus protecting the insulation from rainwater.
In this way, thermal insulation materials retain their performance to the maximum degree, and it becomes possible to use materials that are less resistant to moisture, such as expanded polystyrene. However, when there is no final covering (such as tiles or a protective layer), the waterproofing layer remains exposed to intense temperature fluctuations and ultraviolet radiation, which causes stress due to the contraction and expansion of the material.
The service life of waterproofing materials depends on their quality, their flexibility at low temperatures, and, in the case of bituminous membranes, on their density. For liquid-applied waterproofing systems, application thickness and chemical base (acrylic, hybrid, polyurethane, etc.) play a decisive role.

Conventional Roof Insulation – Non-Trafficable Flat Roof

Conventional non-trafficable roof insulation system with very low weight, approximately 35 kg/m².
The roof can withstand daily use, provided there are no sharp objects or heavy loads. This is a non-trafficable system, suitable for both thermal insulation and waterproofing of flat roofs.

Application method:

Thorough cleaning of the substrate, removal of all loose parts, and repair where necessary.
Application of Avipast Special bituminous emulsion (water-based bitumen) to create a vapour barrier.
Installation of the selected thermal insulation material, with a minimum thickness of 5 cm (Ravatherm XPS X Energy is recommended).
Formation of slopes using fibre-reinforced lightweight concrete.
Application of Arexol Lac bituminous varnish (solvent-based bitumen).
Bonding of bituminous membranes using a gas torch.
For a single-layer system, Ecodien or Hermesdien 6 kg is recommended.
Reinforcement of joints and critical areas with acrylic or bituminous mastic.
Optionally, mechanical fixing of the membrane edges with a special metal strip, where feasible.

Note: In case conversion to a trafficable roof is required, the construction of a reinforced cement screed with a minimum thickness of 4 cm above the bituminous membranes is necessary, followed by tile installation using elastic adhesive Keraflex Maxi S1 (C2-TE-S1).