The use of closed-cell polyurethane foam for modernizing flat roofs is becoming increasingly popular these days. This material alone provides heat and waterproofing in one step building. Renovation of old, leaking flat roofs without demolition. The technological advantage is that it is not necessary to dismantle and remove the old insulation. The expanded foam is versatile and can be used perfectly on almost any construction surface, be it bitumen, concrete or wooden ceiling. The closed-cell foam is gap-free, so the risk of water ingress is eliminated and the energy efficiency of the building is not reduced due to thermal bridges. The closed-cell foam strong, walkablewhile flexibly following the movements of the roof.

If the foam is exposed to sunlight for a long time, it is important to provide UV protection. The insulation is sealed with a polyurea-based paint to protect it from the harmful effects of the sun. If the Customer provides the foam with another top layer (concretes, tiles, applies gravel, builds a green roof, etc.), of course, this polyurea protection will not be necessary.

Read more about UV protective paints here!

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

The roof often gets wet due to outdated, tarry flat roof waterproofing.

Inadequate thermal insulation can cause condensation to form on the ceiling of the upper floor.

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 both water and heat insulation. Tar roof insulation only guarantees water tightness. The complicated layering hides more possibilities for failure. If bitumen roof insulation fails, dismantling and removing the layers entails significant costs.

Rodents often move into outdated insulation materials.

More than half of a building's heat loss is through the roof, which is why flat roof insulation is of paramount importance. An optimal 10 cm thick closed-cell PU foam insulation is equivalent to more than 20 cm thick traditional thermal insulation (cotton or EPS) based on the lambda value.

We are often contacted for just a few leaks, to waterproof a flat roof. In such cases, we apply the insulation in the thinnest possible thickness, 3 cm, using the technology. 

In Europe, polyurethane foam has been used for roof insulation for 60 years. According to experts, the material retains its effectiveness for up to 80 years. The polyurea UV protective coating that protects polyurethane foam is also extremely durable and, if applied with proper expertise, will protect the flat roof insulation against environmental influences for years.

It is important to know that the protective layer is not recommended for long-term physical use. If you use the flat roof as a terrace, the polyurea layer may be subject to wear and tear, in which case it is better to protect the foam with concrete, paving slabs or a gravel bed.

Are there any open questions? Click here to view the Frequently Asked Questions!