Everyone throws this word hard coat out there and I have no idea what they are talking about. Foam and the paint you put over it will put up with 100 degrees as long as the stucture inderneath isn't wobbling around in the wind all the time. Just look at any modern construction and they are going 30 and 40 foot high with metal studs, then 1/2 inch or 7/16 OSB, a layer of barrier cloth then white styrofoam and then stucco base coat, stucco texture finish an done. A serious number of anchors are shot through the foam and I have done mobile facades from pink foam that end up being 24 foot by 80. They are now more than 6 years old and stored outside in the open when not on location. Touching them up from handling and totally repainting them every couple years was in the plan.
The act of freshening up paint jobs is like a performance art that "they are getting ready" and advertsing in a way. Seeing activity, it is going to be on this year.
Just doing the heat gun hardens the surface. Now we do add cement formulas and additives rather than just water to provide a texture then paint, antique and final clear all in exterior grade acrylics. To make it last is simple, you have to use $50 a gallon paint instead of $25 per gallon paint even for the watered down washes. Do you want to paint every year or have the thing peel off and be unsightly or would you like to go about 5 years with out messing with it. That's the real difference. I seem to keep getting work because the old work still "sells" and I don't have to advertise or anything. If it was crap I think I would have been out of that game 18 years ago. The do it yourselfer doesn't get to see what happens over time, they only think about expense at that moment in time.
Applying hard coats can be tricky and can delaminate as well so less is better. You have to adhere it to the panel with lots and lots of glue and possibly base coat the OSB on both sides before applying anything for it to last. Other fascades we have done are use mobile but are seriously heavy 3/4 plywood and 2 by 6 structures and usually some corner gets knocked off of the concrete over lay with a fork truck moving it around or almost dropping it. The styrofoam units can be assembled on the ground and a bunch of people stand it up and anchor it over large windows with heavy metal frames and bang, an architecual design from the 60s becomes haunted mansion in half a day. It is also located in tornado alley and is still being used.
No, there are no pictures, I just do stuff.
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.