sprayvaahtomuovi

Sprayvaahtomuovi, also known as spray polyurethane foam (SPF), is an insulation material that is applied from a spray gun as a liquid and expands into a rigid foam. It is composed primarily of polyols and diisocyanates, which react during spraying to form a foam that expands 50–100 times its initial volume. The resulting foam can be cured at room temperature and will seal walls, ceilings, foundations, and other cavities that are difficult to access with conventional insulation boards or batts.

Because the foam expands to fill voids, it provides a continuous thermal barrier with minimal thermal bridging. It can also serve as a vapor barrier, sound insulation, and in some cases as a structural filler. The typical R‑value of sprayvaahtomuovi is about 6 per inch of thickness, making it highly efficient for reducing heat transfer in residential and commercial buildings.

Sprayvaahtomuovi is applied by professional installers who use a handheld or cart-mounted spray system. The foam is sprayed in thin layers that are quickly interlaminated, allowing contractors to achieve the desired thickness while maintaining an even finish. After curing, the foam can be cut or painted as needed.

Environmental considerations include the use of chemicals such as isocyanates, which require proper handling and protective equipment by installers. The film formed by the foam can lock in radon and moisture if not vented correctly, potentially leading to indoor air quality issues. The disposal of cured foam is usually regulated, and many municipalities accept it as construction waste.

Sprayvaahtomuovi is widely used in retrofit projects where space is limited, in new construction to increase energy efficiency, and in industrial settings to create sealed, moisture-resistant environments. Its rapid installation and high insulating value make it a popular choice among builders seeking a versatile and effective insulating solution.