The following photographs are fairly eloquent. In short, the expanded polyurethane has deteriorated completely.
We ask ourselves:
How long did it take?
What is the cause?
Deterioration of expanded polyurethane can be very fast at times. Over just two or three years it can completely lose its thermal insulation properties and begin to crumble. In 6 or 7 years, only parts and entirely disintegrated remains are left on the roof.
The reason is that the expanded polyurethane was not protected. In fact, many operators do not explain to their customers that expanded polyurethane must always be safeguarded by the application of a protective elastomer (polyurea, hybrid polyurea, or elastomeric polyurethane). This application, always sprayed, must be at least 1 mm thick.
For longer duration in time, the protective elastomer to be used should also be carefully selected. In fact, not all polyurethanes or polyureas resist to atmospheric conditions in the same way. It is not enough to speak of “pure polyurea” to say that the elastomer is the right one. There are many different qualities of “pure polyureas”: excellent, good, fair, mediocre, scarce and very bad. Furthermore, “polyurea” is not always the best product to protect against the weather conditions.
Unfortunately, with the rapid spread of spray applications, many jobs are carried out by operators who improvise or who are incompetent, and for the sake of obtaining a contract they gloss over details of fundamental importance. All this can be the reason for the spread of wrong opinions on expanded polyurethane and on its duration and effectiveness.
FUTURE wishes to carry out an action for directly informing users and application operators. The Future courses have the purpose of illustrating improvement application technologies, and of giving a guide for the choice of the best product for every single application.
Trust the experience of FUTURA. You will obtain safe application, freedom from complaints, and excellent results from your work. Satisfied customers, excellent references.
