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Spray insulation with polyurethane foam applied by pressure is considered to be the most effective and fastest-growing thermal insulation technology so far. As the user of one of the construction forums notes:
Polyurethane foams are gaining more and more because they effectively insulate and outperform styrofoam and wool in terms of lambda value = 0.024 W/mK, and the foam spraying on flat roofs is a great solution, quick assembly, no joints, no need to remove the old cover, does not affect for additional roof load, the disadvantage is that it should not be sprayed in the winter and on windy days.
These optimistic comments result directly from the benefits offered by foam spray insulation. Below you will find the most frequently quoted advantages of this thermal insulator:
- high energy efficiency, due to the exact coverage of all elements requiring insulation,
- it has the best insulation parameters and guarantees tightness,
- homogeneous layer without joints and technological connections,
- durability of the coating,
- adhesion to various substructures,
- it is not slipping or felting,
- polyurethane does not absorb moisture,
- foam is odorless, resistant to mold, fungi, and bacteria,
- strengthens and dampens the construction structure.
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What does the spraying technique look like?
Spray insulation with polyurethane foam is a modern technology of buildings insulation and sealing. High efficiency and ease of application of spray insulation make it a popular way to insulate your house or attic.
How does it look in practice? The two active components of polyurethane foam – polyol and isocyanate – are drawn by pumps to hoses, whereas high-pressure mixing takes place in a spray gun.
Then foam is thrown directly by the gun onto the insulated surface.
A few seconds after application, foam increases its volume several times
forming a homogeneous, durable insulation layer with excellent thermal and
waterproofing properties.
It is worth remembering that foam spray should be made by a professional
company. The application of low-pressure aggregates for hydrodynamic spraying
should only be carried out by comprehensively trained employees.
