Why PIR-plus ?

As compared to PUR or "normal" PIR, our PIR-plus (polyisocyanurate) has a much better fire behaviour.

To clarify the difference, Hardeman B.V. have performed a fire simulation. The panels where exposed to fire on the most vulnerable side of the panels, the open end-side, the simulation was a 30 kW burner, which can be compared with a burning forklift or a comparable heat source. This burner is placed directly to the open side and has a core temperature exceeding 500º Celsius.

During the start of the test, some smoke escapes from the product which is caused by the coal charring of the top layer, after this period, the panel is not contributing to the fire anymore because the char layer protects the PIR-plus foam, also the smoke is reduced to nearly zero. After 30 minutes the test is stopped and it is obvious that only the top layer of the panel has been damaged. The depth of the char coal is about 20 mm in the bottom panels and less than 5 mm in the top panels.

We can clearly conclude that PIR-plus is a very good alternative as compared to rockwool products because the contribution to the fire is almost zero. However, the insulation value is much better and panels are much lighter and easier to process and assemble.  

We can also confirm this with certificates from TNO (Dutch institute for applied scientific research) which state a fire resistance of 30 minutes for the panels 80/112 and 60 minutes for 100/132. Currently we are also testing our 1150WV panels.

C300 profiled panels are the only sandwich panels available on the market in Europe which come standard with PIR-plus foam without extra charge.