Chinooks are nice! Stack of materials are, bare metal, 3 coats POR15 black, butyl backed (dynamat or noico), 1/6th inch closed cell foam, then just added 1/3 inch closed cell foam, jute padding over the middle and foot areas, then vinyl. It really makes a huge difference with the noise level and overall comfort in the cabin. I would say its about 1/2” now of overall closed cell foam. When you tighten back the seat belt and seat bolts it puts the squeeze on the foam. And creates more of a dip in the immediate area since that 1/2” is being squeezed down. For the step wells it only matters if you take the insulation all the way to the lip the step well sits on. Closed cell foam will compress. If i had to do it over, I would trim back the thicker foam from the step well edge and just have the 1/6” foam or something thinner than the 1/3”. 1/3” is pushing it. Hope this helps!Looking good. So what is the order of the stack of materials in the front from metal to vinyl? I’m looking to rip out the old carpet in the cab of my chinook. It’s got a 1” lip from cab to back plywood. What do you think he max amount is that you can raise up the front area and still have the stepwell trim fit?
Most of all. Take your time. When you get new carpet or vinyl. Take your time installing it. I almost messed up and had to order a new one at $160. The cuts are permanent. I spent a couple days installing it.