How to build a lightweight roof

Lightweight, insulating solutions based on expanded clay respond to the need to avoid overloading roofs, maintaining and improving the necessary requirements in this type of intervention.

Preliminary analysis

Building roofs and their thermal insulation are very important operations that must have guaranteed durability over time.

The lightening of these supporting or collaborating layers avoids unnecessarily overloading building roofs.

In addition to executing the flatness of the substrate with the least possible weight for the subsequent installation of waterproofing, tiles or insulation.

It enhances thermal comfort both in summer and in winter, in addition to improving the acoustic insulation of the construction.

In all these applications, in addition to taking advantage of all the additional characteristics of expanded clay and its derivative products, which are hardwearing, stable, incombustible, resistant to high temperatures, completely rot-proof and not attackable by parasites.

Technical considerations

When building roofs, various factors must be taken into account when preparing the substrate and subsequently applying the product:

  • The substrates must be clean, resistant and moist.
  • Expansion joints must be disposed in joins with bows and, in general, all the expansion joints described in the project must be respected.
  • Mix, pour and spread with a minimum thickness of 3 cm, leveling recoverable guide screeds.
  • Let dry for a minimum of 12 hours.
  • In gabled roofs, clad with tiles or other similar system.

Recommended products

Lightweight aggregare

Insulating aggregate

Warnings: The data provided by this Constructive Solution were prepared based on standard onsite installation processes. However, we recommend that you consult our Technical Department in the event of any specific circumstance