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Now in Austria - the PU (polyurethane) Ortschaumtechnik

The company has now finally Vonwald Insulation at this, what is successful in other countries for many years already in use: The polyurethane ortschaumtechnik.
sealing and insulating will now be for everyone - whether large object or house affordable. The insulation values of PU situ speak for themselves ...

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Why does my roofer warns against a Dachbeschäumung?

There are various reasons. It is certainly true that there are foamed roofs that are not really in order. Either here or unqualified processors work, the roof is still covered with conventional UV-protection and has not been serviced. This often happens when the object as changed hands and the new owners knew nothing of the necessary maintenance. Often, however, the owner saw the need to post-not because its roof was so close yet, despite a poor state of the UV-protective coating.
The main reason for the warning from the roofer is probably that they usually lose a repair customers! A foamed elastomer as a roof with UV protection is largely maintenance-free! Even an old foam roof can be repaired in most cases with a post-coating elastomer. Incidentally, the most common reasons why a building owner decides for a roof restoration with polyurethane elastomer in-situ and the unbeatable price and irritation with the constant repairs conventional roofing!

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How long experience, a foamed roof?

How long experience, a foamed roof?
polyurethane foam is not UV stable. In practice this means that the sun would slowly destroys the foam when it is not protected from UV exposure. As long as the UV protection is intact, does not change the foam. Conventional UV-protection paints, usually available as dispersions must be replaced at short intervals. We do not expect our customers. Therefore, we use almost exclusively as a final coating elastomer! The oldest foamed roofs are about 40 years old. By the way, old foam roofs that have treated with conventional paints, can be treated with elastomer in most cases!

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What PUR situ?

PUR-situ produced by the chemical reaction of a polyol with isocyanate. The insulation directly on the object. In-situ polyurethane (PUR or PUO), a 2-component foam is a reaction of the plastic can be processed locally. It is applied in layers between 0.8 and 2 cm thickness, has a very short response time and can be applied including vertical or overhead. The special properties make the material into a high-quality insulating material.

Specifications:

Density 35 - 40 kg / m³
thermal conductivity 0.024 W / mK
closed cell content 95%
vapor diffusion resistance μ 50-100
temperature resistance +80 to -50 ° C by the liquid mixture of polyurethane foam-site is poured between the tank wall or pipe and sheet metal cover. There, the polyurethane foam in-situ on the existing cavity and then hardened in a solid insulating material.