SecuTherm® - "The purpose and the idea that it is based on"

SecuTherm Aufbau
EPS hard foam
NeoPor® hard foam
Material: EPS hard foam 
EPS hard foam 40mm
Thermal conduction group: λR 0,035 W/m²K λR 0,031 W/m²K 60mm
Gross density: ≥23kg/m³ ≥23kg/m³ 80mm
Compressive stress:¹ ≥0,15N/mm² ≥0,15N/mm² 100mm
Fire code: B1 B1 120mm
Edge formation: blunt blunt 140mm
Format / size: 1200mm x 920mm 1200mm x 920mm 160mm
¹With 10% compression

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.


Prior to the renovation, a moisture meter or basic weighing of a removed sample is used to determine the actual saturation of the weatherproofing and is converted to the area.

Water that is standing or able to flow is removed using suction. The wet weatherproofing is dried out again and regenerated with the SecuTherm® system.

Gravel or other imposed loads are removed from the roof surface.

The existing old weatherproofing is, e.g. swept off sharply with a steel broom. Any bubbles are removed/smoothed out.

For an unobstructed diffusion flow, the old weatherproofing is perforated (see current installation instructions -> Downloads).

With the hydrophilic duct system downwards, the SecuTherm® panels are now installed directly on top of the old and perforated roof weatherproofing.

This can take place through bonding, mechanical mounting or imposed loads.

The application of the new roof weatherproofing then follows in the next steps.

SecuTherm® diffusion ventilators are positions and sealed approx. every 200 m². They make it possible to inspect underneath the weatherproofing at any time. With a measurement device, the temperature in C° and the RH humidity "in" the roof can be checked. For this, the ventilator is immediately closed in a vapour-proof manner. If the sensor value rises in relation to the outside air, the permanently active drying process is still fully activated; your roof dries itself out. No later than in the second winter period, the roof is dry (see current SecuTherm Diffusion Ventilator Installation Instructions -> Downloads).

We recommend preventatively using SecuTherm® with green roofs, solar roofs and photovoltaic roofs.

We are pleased to advise you and will not leave any questions open.