Foam spray roof ?

[Dave Penta]

Originally Posted by jlybolt

Sprayed on less than a month ago. Leaks on the interior drop ceilings at several locations were noted.

Hi jlyboult, nice photos of what not to do. Whoever applied this spray foam roofing system had no idea of how to install the system over metal. The foam system has failed do to improper application, light pass thickness and the neglect of proper surface preparation. Although there is no way to tell from the photos, I would say the coating is light too. In order to install the system correctly, the contractor would of needed to install a 2" average of foam. He would of needed to spray on the side of each seam and then filled in the panels. He would of also needed to fill up the panel all the way to the peak, where the unit is, this would of allowed drainage around it. If you would like more info about spray foam roofing, spray foam equipment, or spray foam rigs. contact SprayWorks Equipment Group.

[Dave Penta]

Hi to all. Installing spray foam roofing 5 to 6" thick. There are many things to look for. #1. Check the prep work, prep work should be as if you are going to paint a car.
#2. Check the contractors logs. This should consist of moister and humidity readings along with slit samples throughout the day.
#3. Ask for a slit samples. The slit samples will show how thick the passes have been sprayed. Pending manufacture, passes range from 1/2" to 1 1/2" thick. When installing spray foam, if the passes are sprayed to thick, the foam will get to hot and char.
#4. You might want to ask to inspect the spray foam rig as well. This plays a major factor to the installation. 2 things to look for here. #1. Looking at the spray foam machine, there are 2 gauges in the front, the left side is the A component and the right side is the B component. The 2 should read with in 200lbs of each other. This is a good sign that the contractor is manufacturing the product on ratio. #2. All spray foam machines use some form of air, having air dryers and moister systems in place is vital to the installation. The spray guns use air to operate, anywhere the gun is pointed air is displaced around 100psi. without air dryers and moister systems working properly, the end result can lead to blistering and delamination of sprayed passes. #5. There are many types of coatings used to protect the spay foam system, including gravel. When using gravel, the idea from the manufacture is the gravel will block out the UV and will get hot to evaporate water from the system. #6 When using a protective coating, a base coat should be installed in the same day. If not installed with in 72 hours (pending manufacture) the foam will begin to get UV damage and not allow the coating to adhere. The applied coating thickness will determine the life of the system. There are different types of coatings and specs for them. #7 inspecting the system 24 hours after a rain to insure there is no standing water. Most manufactures will not allow a 10ftX10ft area @ 1" deep of pounding water. #8 during final inspection the system should be inspected for blisters, proper details. #9. Get a copy of the 3rd party inspection. I hope this crash course helps. If you would like more information contact SprayWorks Equipment Group.

[Linas Dapkus]

Thanks for your timely response and update Dave.

[Pete Campbell]

These types of roof coverings in Vero Beach, FL are garbage and are intended as a very low end product to defer the costs of proper removal and replacement of the worn-out roof covering.