PUR foam roof insulation

The roof is one of the key partitions of any building – it is responsible for protection from changing weather conditions and plays an important role in stabilizing the entire structure. Spray insulation for the roof using PUR foam, provides not only a solid barrier against cold and heat, but also performance for years. This solution is especially recommended for spray insulation of flat roofs, where airtightness and energy efficiency are crucial.

Why choose PUR foam roof insulation

High mechanical resistance – PUR foam layer is characterized by excellent resistance to damage and external factors.
Protection against heat loss – PUR foam roof insulation effectively reduces the escape of heat energy, which translates into lower heating bills.
Stability of performance over the years – the applied spray insulation of the roof does not lose its properties over time, making the investment durable and maintenance-free.

Spray insulation for roof

A technologically advanced solution based on two liquid components that, under the influence of appropriate pressure and temperature, form a high-quality polyurethane foam. Thanks to the carefully selected composition, we get a material with repeatable parameters – ideal for applications such as PUR foam roof insulation. In the case of roofing, especially those with a flat structure, rigid open-cell foam is used, which is ideal for PUR foam roof insulation.

Advantages of PUR foam roof insulation

PUR foam roof insulation made by spraying is one of the most effective solutions for modern thermal insulation of buildings. We use polyurethane foam, which not only perfectly retains heat, but also has exceptional durability and resistance to external factors.

Spray insulation of the roof with open-cell foam provides high mechanical resistance and effectively protects against moisture. The material creates an impenetrable barrier that prevents the growth of mold and other microorganisms – making it an ideal choice for those who value a healthy microclimate inside the building.

Spray technology allows for extremely thorough coverage of the entire surface – the foam perfectly fills every gap, eliminating the risk of thermal bridges. This is crucial for maintaining high energy efficiency of the roof, regardless of its design.

An additional advantage is durability – confirmed by the declaration of invariability of insulation parameters for 25 years. It’s a solution that works well both for newly constructed buildings and during thermo-modernization works.

What to keep in mind when insulating the roof with PUR foam?

When deciding to insulate theroof with PUR foam, it is necessary to take into account the specifics of this type of insulation. The roof, as the highest partition of the building, is exposed to extreme weather conditions, so its protection requires a material of exceptional durability and effectiveness. For this reason, spray insulation for the roof using open-cell foam will be an excellent choice.

PUR foam roof insulation involves applying the material directly to the exterior surface – which requires not only precision, but also the use of a raw material that is resistant to temperature changes, moisture and mechanical damage. PUR foam fulfills these requirements thanks to its unique physical and chemical properties.

The most important features of polyurethane foam:

Very high mechanical strength – ideal for structures exposed to pressure and movement.
Resistant to moisture and water – it does not soak and does not degrade even in harsh conditions.
Excellent insulation properties – low thermal conductivity translates into effective spray insulation of the roof.

Thanks to these parameters, PUR foam roof insulation is ideal for flat roofs – where not only airtightness but also load resistance matters.

In the case of pitched roofs with wooden trusses, however, it is recommended to use open-cell foam, which, thanks to its greater vapor permeability, works better with wooden structures and allows the partition to “breathe”.

FAQ

Is PUR foam on the roof flammable?

When insulating a roof with PUR foam, many people wonder about the material’s reaction to fire. It is worth knowing that the fire properties of foam can vary from manufacturer to manufacturer. The safety of users is treated as a priority – that’s why our solutions undergo rigorous fire reaction tests and receive the “self-extinguishing” classification .

What‘ s more,spray insulation for roofs made of PUR foam exhibits the ability to form a protective layer of char when it comes into contact with a flame. This thin, charred layer effectively restricts the access of oxygen to the fire and thus blocks the spread of fire. Such a property significantly increases the safety of the entire roof structure, protecting it from rapid fire development.

As a result, spray insulation of the roof is not only an effective thermal protection, but also an element that increases the building’s resistance to fire hazards.

What is the strength of PUR foam?

One of the greatest advantages offered by PUR foam roof insulation is the exceptional mechanical resistance of the material. The polyurethane foam used by our company is distinguished by its high density – more than 50 kg/m³ – and the high quality of raw materials and additives that strengthen its structure. This makes it ideal for spray thermal insulation of the roof, especially for flat roofs insulated from the outside.

PUR foam roof insulation has a compressive strength of more than 350 kPa with only 10% deformation.

Thanks to its durability and stability, PUR spray foam roof insulation not only effectively protects against heat loss, but also meets the utility requirements of modern construction.

Is it necessary to apply waterproofing to PUR foam?

Although closed-cell PUR foam roof insulation has excellent moisture resistance and excellent barrier properties, it is not a strictly waterproofing material. Therefore, in practice – despite the fact that spray insulation of the roof effectively inhibits water penetration – it is recommended to protect it additionally. For this purpose, a single-component polyurethane coating is applied to the foam surface to form a waterproof and durable shield.

With this solution, spray insulation for the roof forms a compact and tight layer that protects against water, UV radiation and mechanical damage – for up to 25 years.

Does the foam require development?

It is worth noting that PUR foam roof insulation does not require traditional construction, which is one of its biggest advantages. After insulation, the roof surface becomes smooth, uniform and ready for further work – such as just the application of the waterproofing layer or utility finish. No need to install additional construction means savings in time, materials and costs, as well as faster implementation of the project.

Roof insulation with PUR foam