Technical sheet
CONTROFOILBLUE TEX
new
CONTROFOIL® DUPLEX 170V
CONTROFOIL DUPLEX - the latest generation of electrically conductive detection layer for spark tests
Innovative technology with a patented composition with a special micro-ventilation fleece and micro-channel structure.
CONTROFOIL / detection conductive layer
Membrane designed to create a conductive layer under a mPVC-based membrane. The conductive layer provides perfect conditions for performing the HVET spark test. It is used in single-skin flat roofs with a classic layer sequence and is installed directly under the membrane.
CONTROFOIL DUPLEX - membrane with the best electrical conductivity compared to cheap conductive geotextiles, with an electrical resistance of almost 10,000 Ω, as they contain only a minimal amount of electrically conductive copper fibers.
CONTROFOIL DUPLEX - has a unique multi-purpose fleece on both the top and bottom of the conductive aluminum layer.
Parameters:
- packaging: 100 m²
- weight per unit area: 170 g/m²
- fire reaction class: E
- equivalent diffusion thickness sd: 0.65 m
- long-term temperature resistance: 80 °C
Why use CONTROFOIL conductive layer?
The High Voltage Electronic Leak Detection or ,,spark test,, only works if the substrate under the waterproofing layer is electrically conductive. For example, damp concrete, sufficiently wet roofing layers (especially geotextile) or there is CONTROFOIL in the roof.
The disadvantage of roofs without a CONTROFOIL detection layer is that sufficient water must enter through the roof leaks before measurement to soak the roof layers, thus rendering them electrically conductive. Otherwise the holes cannot be identified. This requires first letting the roof layers be damaged by water and moisture and only then looking for the causes. So only holes that have already leaked through can be identified.
Example without CONTROFOIL detection layer: the investor asked for an inspection of a new roof just completed with new dry materials. The investor needs to test the roof as soon as possible. It has not yet rained on the roof so they are waiting for rain. The investor needs to be explained what the situation is:
1. Until the actual inspection, the roof layers (under the waterproofing) must not dry out in order to conduct electric current.
2. Little water can flow into the roof through the tiny holes and perhaps manage to evaporate. Tiny holes may not be found.
3. The surface of the roof must be dry in order to measure.
4. If new holes are created just before the measurement that have not already leaked through, these holes will not be found.
5. If, by the time of measurement, the roof layers (under the waterproofing) have dried out or have reduced their moisture content necessary for conducting electricity. nothing will be found!
Conclusion: You can see for yourself the many disadvantages and effects that then make the spark test just a "show". The roof must first be damaged by moisture and only then checked. But be careful, the tightness was checked and not the moisture that remains in the roof.
Example with the CONTROFOIL detection layer: The investor wants to check the roof with new dry materials and with the CONTROFOIL layer, which is still electrically conductive. The roof does not have to be damaged by moisture first and then checked for tightness
1. Holes will always be found. Whether they are new (created now) or earlier.
2. Electrical conductivity is the same everywhere and forever. There is no risk of it disappearing in warm weather.
Conclusion: The test is done responsibly and well for the first time. The roof was measurable but may not have been damaged by moisture. Measurement certainty, electrical conductivity certainty, measurement reliability.
Will the flood test help?
The amount of water that passes through a leak in a flood test is certainly higher than in rain. But beware! The amount of water that enters through the holes can be enormous. The water from the flood test will then leak out of the roof for up to a year. So using a flood test to make a spark test work afterwards is an unnecessary gamble. If you really need to prove to an investor that your roof is tight I recommend a flood test only after a good quality spark test with a CONTROFOIL detection layer in the roof.
The solution is to hand over the roof (after its completion) by performing a control test and issuing a protocol on integrity. However, quality control, e.g. using the HVET spark test, requires ensuring conditions in the form of a conductive substrate under the flat roof covering. In practice, however, there is no conductive layer under the covering (separation geotextile, EPS polystyrene, mineral wool are non-conductive materials for electric current).
What is the principle and reason for using the CONTROFOIL conductive layer?
The following images show the reasons and advantages of performing a spark test using a CONTROFOIL conductive membrane. For proper detection, it is extremely important that there is a conductive layer under the roofing membrane, especially when checking a new roof with no previous signs of leakage.
Single-ply flat roof
without conductive layer under the waterproofing
* red color indicates conductive material and availability of electric current under the waterproofing
Checking the integrity of the coating covering is affected by the availability of electric current under the covering
In the case of dry materials under the waterproofing, it is not possible to perform high-quality integrity detection
Only violations are identified, through which a significant amount of water has entered the structure and the resulting moisture creates a conductive state for electric current
Single-ply flat roof
with a built-in conductive layer under the coating
** red color indicates conductive material and availability of electric current directly under the coating
High-precision and high-quality inspection of the integrity of the waterproofing with the detection of all leaks
Possibility of checking the integrity immediately after the roof is completed, before filling or installing additional layers over the roofing
Integrity test protocol when the roof is finished and before other workers start work
When and where is it necessary to install the CONTROFOIL conductive layer?
The installation of the CONTROFOIL conductive layer is necessary wherever the coating covering is required to be checked by the HVET spark test and the substrate under the covering itself (e.g. EPS polystyrene, mineral wool, separation geotextile or the original covering) is non-conductive for electric current.
Single-skin flat roof with layers above the roofing membrane
Checking the integrity of the coating is extremely important if the coating is covered with additional built-in layers in the subsequent construction process.
Checking the integrity of the covering, e.g. by means of an HVET spark test, depends on the conductive substrate under the covering, which is provided by the conductive CONTROFOIL layer.
Single-skin flat roof DUO
It is extremely important to pay attention to a qualified integrity test on a conductive substrate. The subsequent installation of additional layers in the form of XPS polystyrene will make any simple and affordable leak detection impossible. The incorporation of the CONTROFOIL conductive layer will ensure perfect conditions for integrity control, e.g. by HVET spark test.
Single-skin flat roof with EPS polystyrene
The EPS polystyrene layer and the separation geotextile do not ensure the conduction of electric current and thus do not allow the HVET spark test to be performed.
The incorporation of the CONTROFOIL conductive layer will ensure suitable conditions for the correct performance of the HVET spark test.
Single-skin flat roof with mineral wool
The layer of thermal insulation based on mineral wool does not ensure the conduction of electric current and therefore does not allow the HVET spark test to be performed.
The addition of the CONTROFOIL conductive layer will ensure suitable conditions for the correct performance of the HVET spark test.
Single-skin flat roof with mineral wool and original roofing
Renovating a flat roof by adding a new coating over the original will eliminate any possibility of detecting leaks.
Adding a conductive layer of CONTROFOIL between the original and new coating will ensure suitable conditions for the correct performance of the HVET spark integrity test.
How to properly install the CONTROFOIL conductive layer?
The CONTROFOIL conductive layer is applied to the thermal insulation layer of a flat roof directly under the mPVC or TPO-based roofing. Its connection with the attic sheet metal construction and mutual overlap in joints 50 mm wide creates a full-surface conductive layer.
