Polyurethane foam
Closed-cell, open-cell – what's the difference? Read more about the material!
Our products
Closed-cell foam insulation
The best thermal insulation available with 100% waterproofing
Open cell foam
Excellent heat and sound insulation, for filling large hollow spaces
Polyurea UV protection
Waterproofing and protection against UV radiation in one
Our brands
How is polyurethane insulation made?
Sprayed polyurethane insulation is a modern technology in which two liquid components – polyol and isocyanate – are mixed directly at the application site. The reaction is fast: it swells spectacularly in a few seconds and then hardens. The result is a uniform, seamless, thermosetting cellular plastic layer that is excellent with heat and vapor barrier properties has.
The two main types of polyurethane insulation are closed cell foam and the open-cell foam. The closed-cell version forms a denser, water-tight layer, making it ideal for exterior surfaces, flat roofs or industrial environments. The open-cell foam, on the other hand, is lighter, more flexible and breathable, so it is mainly used for insulating interior spaces, such as attics or partition walls.
Since polyurethane foam is sensitive to UV radiation, it is essential for outdoor use. UV protection This is usually done with special coatings or other top layers that protect the foam from the harmful effects of sunlight.
The sprayed foam is thermosetting cellular plastic insulation, its two main components are polyol and isocyanate. During the reaction, the two substances release heat, and within a few seconds a solid foam is formed, which is only sticky for a very short time.
Thermal conductivity
What does the lambda value mean in insulation materials?
The effectiveness of insulating materials is most often determined by lambda value (λ) is measured. This shows that 1 meter thick on material, On 1 square meter of surface, In 1 second how much heat passes through if the temperature difference between the two sides is 1 °C (or 1 Kelvin). The unit of measurement is: Watt/meter Kelvin (W/mK). Than the lambda value is smaller, the more better thermal insulation the material.
THE closed cell foam has an exceptionally low lambda value, therefore the same insulation performance can be achieved half as thick than many traditional insulation materials. This is especially useful where space is limited, such as in attics or walls.
However, it is important to know that the lambda value data measured under laboratory conditions – that is, does not take into account problems that arise during construction, such as: thermal bridges, ventilation corners, gaps caused by rodents, inaccurate alignments. These defects are common with traditional, panel-based insulation materials. In contrast, scattered purfoam insulation – be it open cell or closed cell foam – it is formed locally on the surface, so it is completely a gap-free, airtight shield As a result, in reality its insulation performance is often even right, than we would expect based on the lambda value.
Closed-cell foam
Closed-cell foam – the most effective thermal and waterproofing
THE closed cell foam one of the best thermal insulation materials of today. Its exceptional advantage is that the excellent thermal insulation ability next to complete watertightness It also provides a solid, strong surface that walkable and chargeable, so it's a perfect choice flat roofs, slabs, terraces also for insulation.
Sprayed foam insulation is made on site: our trucks' machines mix the two liquid components and then apply the material. on a heated hose The foam returns to its original volume within a few seconds after being blown out. multiple times (up to 40 times) it swells while forming into a solid structure.
Why is closed-cell foam more effective than other insulations?
-
Tight cell structure significantly denser and harderlike open-cell foam.
-
Difficult to remove, forms a stable, durable layer.
-
THE lambda value It has twice the insulating capacity of most traditional materials – i.e. for the same level of thermal insulation half the thickness is enough.
THE closed cell foam on the other hand gap-free, forms a continuous insulation, so in practice more effective, than we would expect based on the lambda value.
Closed-cell or open-cell?
-
THE open-cell foam more flexible, lighter and cheaper, but less dense, so mainly for interior insulation ideal.
-
THE closed-cell version although more expensive, but higher load capacity, watertight, and much better thermal insulator – thus a more economical solution in the long run.
Warning: UV protection is required outdoors
It is important to know that for outdoor applications, the foam UV radiation must be protected, as sunlight can damage the surface in the long term. This With UV protective coating or can be provided with a cover.
General benefits
✅ The best thermal insulation available – lambda value: 0.022 W/mK
✅ It also forms a waterproof layer in one step
✅ Can be used in both new and old buildings
✅ Adheres to almost any surface (concrete, wood, metal, sheet metal, etc.)
✅ Gap-free and completely airtight
✅ Easy, does not burden the structure
✅ Vapor diffusive – the building remains breathable
✅ Shape-follower, does not require separate fixation
✅ Fast execution – a team of up to 300 m²/day can do insulation
✅ Step-resistant and load-bearing surface
✅ 10 year warranty
Technical data
(It is a good idea to put this in a separate block, such as a table or a separate “property box.”)
| Property | Value |
|---|---|
| Body density | 35–55 kg/m³ |
| Thermal conductivity coefficient (λ) | 0.022 W/mK |
| Compressive strength | 280 kPa |
| Water vapor diffusion coefficient | μ > 65 |
| Water absorption capacity | < 0.11 kg/m² |
| Air permeability | 0.00004 l/s m² |
| Fire protection classification | B2 (self-extinguishing, does not feed the fire) |
Open cell foam
THE open-cell foam perfectly form-following, fills the surfaces and spaces to be insulated without gaps. The sprayed foam is its sponge-like structure thanks to airtight, but not waterproof – so does not provide waterproofingOpen cells allow for the passage of water vapor, which means that the structure is vapor permeable, but excessive moisture can damage it.
Features and benefits:
- Excellent thermal and sound insulation
- Easy structure – does not burden the building
- Can be removed even by hand
- Can be used for ceilings, attics, partition walls
- Airtight but not watertight
- Vapor diffusive, so the building can "breathe"
Technology:
THE open-cell polyurethane foam is applied in the same way as the closed cell foam in case of:
- The two-component material is truck-mounted machine mixes it up
- On a heated hose sprinkle it on the surface through
- The material is solidifies in a few seconds, meanwhile even a hundredfold swell
- The finished foam airtight, but the open cell structure, so not waterproof
It is important to know that open-cell foam can be an excellent choice for interior insulation, where waterproofing is not required. For outdoor use or watertightness, the closed cell foam recommended, suitable With UV protection.
Open cell values
Material density: 8-15 kg/m3
Thermal conductivity factor: 0.035W/mK
(lambda value)
Fire protection classification: self-extinguishing, B2
classification
Applications
attic installation
slab structure
indoor side wall
exterior facades
other hollow spaces
Open cell foam
excellent thermal insulation
gap-free
sticks strongly
it doesn't collapse
efficient filling of larger spaces
Polyurea UV protection
If the closed cell foam insulation is applied outside the building, it is essential to sun's harmful UV radiation protection against. For this purpose, a special, two-component synthetic resin-based UV coating We offer a coating that simultaneously provides waterproof and corrosion protection properties.
Advantages of the UV protective layer:
-
Completely a seamless, continuous watertight surface forms without seams and dilation
-
Wear-resistant, flexible and yet highly durable coating
-
Non-slip provides a surface
-
Protects closed-cell foam insulation from environmental influences and extends its lifespan
Application technology:
The two-component reactor heats the UV protection material, which is delivered to the spray gun through heated tubes. During application, the coating With a pressure of 240 bar is sprayed onto the surface. The material solidifies within a few seconds and reaches its final physical and chemical properties after approximately 24 hours.
Advantages
quick and easy application
fills in the gaps
in addition to waterproofing, UV protection
flexible, does not crack
Where do we use it?
insulation of roofs and slate roofs
UV protection of polyurethane foams
internal insulation of pools
truck flatbeds
Preparation for foam insulation
Preliminary consultation:
It is important to discuss construction work before installing foam insulation to avoid later damage.
-
Solar panels: On flat roofs, the support legs of solar panels must be attached before insulation; this is not necessary for base solar panels because the insulation can be loaded.
-
Drywall: Attach the support brackets in advance to the cover planned for the side wall or roof plane.
-
Base insulation: Secure the location of fittings and pipes in advance so that they do not have to be cut in later, thus preventing gaps.
Protection on surrounding surfaces:
During sprayed foam insulation, tiny foam particles circulate in the air, which can easily settle on windows, doors, cars, and objects.
-
Cover the surrounding surfaces!
-
When working outdoors, take the wind direction into account and pause insulation work in windy weather.
Protective equipment for foam insulation
-
Respiratory protection: Use a suitable protective mask! Stay away from the work area while spraying.
-
Eye protection: Safety glasses or a combination mask are recommended to protect against splashes.
-
Protective clothing: Wear disposable or easily cleanable protective clothing to avoid skin contact.
-
Glove: Using the right size work gloves is essential.
First aid and health information
-
Polyurethane foam not dangerous when hardened, the risk arises when handling materials during insulation.
-
Inhalation: Avoid inhaling gases produced as the foam expands! If anyone is in the area without a protective mask, warn them immediately and move them to fresh air. High concentrations can reduce oxygen levels, and symptoms may worsen even hours later.
-
Skin contact: Wash affected area with plenty of water and soap. Corn oil or propylene glycol may be more effective. Remove contaminated clothing. In case of contact with a wound, seek immediate medical attention.
-
Eye contact: Rinse with plenty of lukewarm water for at least 15 minutes and then seek medical attention.
-
Ingestion: Do not induce vomiting, seek medical attention immediately.
Applications of spray foam
Flat roof
Waterproofing and thermal insulation of new and already old flat roofs can also be solved, and we can also perform the insulation on existing bituminous surfaces without demolition!
Attic floor
Most of heat loss escapes through the slabs, so the insulation of the attics is an important topic in when you plan the modernization of the building.
Attic
Uninhabited attics are usually insulated from the inside, between the rafters. If the attic is inhabited, it is insulated from the outside, after dismantling the shell.
Hall, warehouse
Shape-following thermal and waterproofing is the perfect choice for lightweight buildings. Say goodbye to condensation problems!
Stable, barn, grain storage
Sterile and washable surface without complicated installation. Where the time factor is important: we can perform up to 1,000 m2 of insulation per day.
Side wall
Heat and sound insulation of internal side walls, as well as foam insulation of external facades. It can be easily applied even on plastered walls.
Slab insulation
The walkable foam layer is an excellent solution for specially shaped rooms, including stairs and mechanical systems, as it helps to insulate these areas without gaps.
Ceiling insulation
If there is an unheated living space under your apartment (a basement or a garage), it is important to insulate the floor. The foam is an ideal choice in every aspect.
Trapezoidal plate
In addition to soaking, the condensation problem is the biggest fault of trapezoidal sheet buildings. Dripping steam is not only annoying, but can also cause damage to the building.
Corrugated slate
The majority of slate roofs get wet, due to the complicated fixing and layering of traditional insulation, it can be said that their insulation is only possible economically with PU foam.
Tank, container
Shape-following thermal insulation and corrosion protection of tanks with fast progress. It can even be used to insulate underground tanks. Ask for our offer for foam insulation!
Terrace
Effective heat, water and sound insulation of terraces! The closed-cell material can be covered with concrete, tiles, or you can even build a green terrace on it. Remember: half of the thickness of traditional insulation is enough!
Request an offer!
Euro-Ker-Szig Kft.
4251 Hajdúsámson
Debreceni út 24