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![](https://static.wixstatic.com/media/8da48a_01197d4e9d5b4196b897fe035b762cd7f000.jpg/v1/fill/w_132,h_74,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/8da48a_01197d4e9d5b4196b897fe035b762cd7f000.jpg)
![logo controfoil bluetransparent.png](https://static.wixstatic.com/media/8da48a_264297db05e24eef8a8b51f89ba29cb7~mv2_d_32544_6695_s_6.png/v1/fill/w_600,h_123,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/logo%20controfoil%20bluetransparent.png)
roof tightness in the first place
The flat roof does not have to leak.
What is a spark test?
Thanks to us, even today, the spark test is a well-known concept in terms of roof tightness. The CONTROFOIL system contains the CONTROFOIL detection foil and the CONTROFOIL DETECTOR spark device.
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