The quality of a spray foam application will always be dependent on properly functioning equipment, regardless of how many years experience an applicator might have. Heated Hoses are a vital part of any spray foam equipment setup and are critical to the consistent flow of material, which translates to a uniform spray and ultimately, a better application with less waste. Heated hose lengths can be up to 400 feet long, so, it’s necessary to keep the material heated as it travels through the hose temperatures all the way out to the spray gun. Maintaining temperatures helps to ensure proper mix and ratios at the point of application.
Most all spray foam hoses are heated in order to maintain the proper chemical temperature, however spray foam heated hoses are not designed to heat the foam initially, heated hoses are only designed to maintain the heat of the foam at a specific temperature as it flows through the hose.
When left coiled, the hose can create hot spots that will cause temperature spikes which can potentially degrade the foam as it flows through the hose.
This is why you should always uncoil your foam hose before heating it.
Just another expert idea from Guy Calor, the Caulk King and CaulkWarmer