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epoxy coatings for roof over spf Post New Topic | Post Reply
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JOSEPH MARINZULICH
Posted: Sep 08, 2008 08:43 AM
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epoxy coatings for roof over spf
Has anyone ever used epoxy coating over spf?Is this new tech? What companies offer this product? Any ideas are qreatly appreciated. Thanks. |
Aaron Scurlock
Posted: Sep 22, 2008 10:33 AM
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Why epoxy? |
Linerman
Posted: Sep 22, 2008 07:39 PM
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Volatile Free has an aluminum coating that applies right over the foam in roofing applications. |
Aaron Scurlock
Posted: Nov 14, 2008 08:43 PM
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Are you talking ablout the 551 urethane coating? |
Posted: Nov 15, 2008 09:38 AM
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Any and ALL coating sprayed over spf,,, better be elastomeric..... If not, you will have serious failures down road. |
Dennis Davidson
Posted: Mar 19, 2009 01:24 PM
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Three main types of coating for use over foam are acrylics, urethanes & silicones. Each has it's limitations for use. The VFI aluminum coatings are 550 moisture cure and the 540 hybrid polyurea for use over foam. The most common use for epoxies on a roof (in connection with a foam system) is as a primer over a bare concrete deck. |
Posted: Mar 19, 2009 05:42 PM
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I used the 540 before from Volatile free and works very well on metal application only, but never used on foam. I have heard (I am going to try anyway) that Polyurea over foam shrinks up a little. Is there any truth to this? Silicone is so easy and unless you are going to have a lot of traffic, I am not sure if I would go with an epoxy. I would put extra granules and let it ride! |
Dennis Davidson
Posted: Mar 19, 2009 06:59 PM
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I've used both VFI 550 moisture cure urethane & VFI 540 polyurea hybrid over foam. Both worked well. I have not noticed nor heard of any shrinkage issues. These products are intended to be an economical coating designed for use over foam. It works well over metal and single-ply too. If you need a tough durable coating, nothing beats the urethanes be it a moisture cure, batch chemical cure or a polyurea! Silicones are great for longevity as long as there is plenty of slope and limited traffic, even with granules. |