Flat roof insulation

The use of closed-cell polyurethane foam during flat roof insulation is becoming more and more popular, as it solves the issue of flat roof waterproofing in addition to flat roof thermal insulation. More and more architects are designing with purfoam roof insulation in connection with new construction projects. Purhab flat roof waterproofing is most often used on old, sagging flat roofs. The technological advantage of this is that it is not necessary to dismantle and transport the old insulation (which would often be more expensive than making the insulation we offer). Purfoam is versatile and can be used perfectly on almost any construction industry surface, be it bitumen, concrete or wooden closing slab. The closed-cell foam is gap-free, so the risk of waterlogging is eliminated and the energy efficiency of the building is not reduced due to thermal bridges. The material used flexibly follows the movements of the roof, it does not crack, so it is not necessary to install expansion strips.

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If the foam is exposed to the sun for a long time, it is important to provide UV protection. We seal the insulation against the harmful effects of the sun with a polyurea-based paint. This cover layer effectively protects the foam insulation and extends its life. If the Customer provides the purfoam with another covering layer (concrete, pave it, put gravel on it, build a green roof, etc.), of course this polyurea protection is not absolutely necessary.

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Low-quality flat roof insulation significantly increases heating and cooling costs.

The roof often gets wet due to outdated, tarry flat roof waterproofing.

Due to inadequate thermal insulation, condensation may form on the ceiling of the upper level.

Most traditional insulation materials do not exactly follow the movement of the building, which can lead to small unevenness and cracks.

The complicated layering of traditional materials does not provide water and heat insulation at the same time. Tar roof insulation only guarantees water tightness. An overcomplicated layer order may contain more error possibilities. If the bituminous roof insulation fails, the dismantling and removal of the layers involves significant costs.

Rodents often move into outdated insulation materials.

Given that more than half of a building's heat loss is lost through the roof, flat roof insulation is of paramount importance. They often come to us just for the waterproofing/wetting of the flat roof, in which case we apply the foam roof insulation in the thinnest layer, 3 cm thick. Although this minimum thickness does not yet provide strong flat roof thermal insulation, even this 3 cm provides 100% waterproofing to the building. If flat roof thermal insulation is also a consideration, we will recommend a thicker layer. A 10 cm thick closed-cell foam insulation provides the same efficiency as a 20 cm thick traditional thermal insulation (e.g. cotton or step-resistant EPS).

Purfoam has been used for roof insulation in Europe for 60 years, and according to experts, it retains its effectiveness for up to 80 years. The polyurea UV protection coating that protects the foam is also extremely durable, if applied with the right expertise, it protects the flat roof insulation against environmental influences for decades. It is important to know that the protective layer is not recommended for long-term physical use. If the flat roof is used as a terrace, the polyurea layer may be exposed to wear. In such a case, it is better to combine the foam with paving slabs, cold cover or protection with a gravel bed.

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