Standardized flat roofs show an inclination of up to 5 degrees. Temperature dependent material expansion and/or depression can cause a beginning shifting of flat roof systems. This can cause a catastrophic impact on the roof sheeting, interfering areas and other components as cable laying and so on and can lead in the worst case to a fall of the plant off the edge of the roof. Thus, the recommendation of BSW is: mounting systems are to secure against shifting. Does this mean that there will be no more penetration-free mounting systems available in the future?
Not at all! PMT had recognized the problem for several years! We have substantially let our marks of knowledge and findings in the note of BSW and already pointed out the problem in an interview in 2018. Thanks to this early realization, we had the chance to influence our product development regarding the problem of the caterpillar effect. In costly internal tests we could simulate extreme variations in temperature and thus imitate crawling effects of several years.
The result: Our flat roof mounting system can still be mounted penetration-free up to an inclination of up to 3.5 degrees.
We manage it by means of ingenious components of our system, where other manufacturers already have to face the disadvantages of a roof penetrating: Our click-connections permit the system’s components just enough space that linear expansions can be neutralized. Apart from that, the high-tech protection mats absorb movements of the plant and thus counteract to the caterpillar effect. Our design department considers the temperature effects of each project according to our test results and experience.
PMT turns safety into standard!
