Renovate with SecuTherm® - single-shell non-ventilate flat roofs without total demolition (for a flat roof that always stays dry)

The planning and correct execution of flat roofs impose high standards on everyone, in terms of building physics and structural engineering. If one level is not 100% fulfilled, the damage and the resulting expensive renovation is not far away. Damage caused by dampness, regardless of whether it is from moisture contained in the building components or penetrating water, are the most frequent causes of building damage. To protect from further damage to the roof and building, these wet roofs are still categorically demolished, but why?

Previously, it has not been possible to conduct the trapped water away into the atmosphere. With SecuTherm®, a natural principle is created for conducting away this trapped moisture, repeatedly and immediately. Air absorbs water in the form of water vapour and releases it again. The warm, moist air (wet weatherproofing) is quickly conducted away into the atmosphere through the hydrophilic SecuTherm® coating, but how? Through the downward vapour pressure gradient!

With a heat transition calculation, the calculated evidence is provided that this function works faultlessly with SecuTherm® in the flat roof in terms of building physics.

Example: Alsterdorfer Sports Hall, Hamburg (renovated in 2014 with approx. 3,200m2)

The interior room temperature of this building is at > ø19C° all year round. The relative humidity (RH) under "normal" conditions 50%. The vapour pressure (DIN 4108) is at 1,147 pascals. Through the component (roof) here, a mass concrete ceiling, the warm air flows to the vapour barrier lying above (if available - as in the example) up to the "wet" 50mm PS + 50mm PU weatherproofing. The temperature arriving here is at 11.84C° and a RH of 100% equal to 1,387 Ps.

With SecuTherm®, the excess moisture can be conducted away through the downward vapour pressure gradient inside/roof from 1,387 pascals to outside/atmosphere 905 pascals via the hydrophilic duct system, connected with a SecuTherm® ventilator, into the atmosphere, until excess vapour pressure exists or the equilibrium moisture (inside/roof=outside/atmosphere) is restored. The water that had penetrated the weatherproofing had dried out after one heating period.

Another advantage of the SecuTherm® system is the supplemental weatherproofing function in various thicknesses (mm). The minimum drying-out volume for this example is at 7.97 l/m2/year, verifiably.

For example, if the room temperature were above 21C°, a significantly higher water vapour evaporation volume would occur - verifiably >10 l/m2/year.

For each property, we specifically prepare a verifiable heat transition calculation, with a stated minimum drying-out volume l/m2/year.