Originally Posted by Johnny M
K Corbin your post is exactly why I choose not use reflectix and yes I have been on their website but I have been told by many to use it. Good to know info about the glue dulling it. K Corbin what do you suggest we do try a different adhesive and stay with the styrofoam? We considered removing it but worry we will have same problem with the headliner directly on the fiberglass as we did on the inside of the door. We are considering pulling it down and just painting
the inside but worry the 5000 BTU AC won't be effective. Borrego Dave thanks for your I put too don't remember the exact temperatures as the test were last summer but they seemed significant enough to justify the styrofoam not to mention the styrofoam was significantly more cost effective not including our wasted material. There has got to be something out there like Nasa space stuff lol that would work for these eggs with good R values and stay put.
Super 77 spray adhesive is intended to be re-positionable for up to 2 days. So that is not going to work for an overhead ceiling application where you are applying a material to a surface that is already overhead. Under those conditions you need to use a glue that is not rated as re-positionable for any substantial length of time. For instance Weld Bond brush on VOC based contact cement, you might get one extra try but it will only happen within a few minutes time frame window to make a re-position possible.
Styrofoam is that type of solid ridged stuff they make those white disposable coolers from that drive you crazy with the squeaking. They also use it for float docks and sometimes for packaging. They used to use it for insulation in walls on RVs and houses but there are much better products being sold for that purpose now.
So that leaves the question of exactly what kind of foam board insulation product did you buy? Without actually knowing what foam board product you used it is hard to state what adhesive might work on the surface. If you bought the polyisocyanurate board that has a thin layer of plastic sheeting on the surface then that thin plastic layer could be much of your problem in trying to get an adhesive to stick fabric to your foam board. There is not going to be any adhesive I can think of that will stay well stuck to it so of course your headliner will fall
down. That thin film is helping to act as a moisture barrier but if you have the foam stuck to the ceiling already and that is the kind of insulation board you purchased I guess you could peel of that layer and try using a spray foam.
For what it is worth I myself have come to the conclusion that for overhead insulation
using a closed cell foam product is going to be about as good as it gets for insulation values in a fiberglass trailer where you are not going to have a professionally sprayed in place foam layer. The Ensolite product that people in this forum talk about that gets used in some makes of trailers is a dense closed cell foam. You can use spray glues on that product. There will be a list of suitable spray glues for it on the sites that sell that type of foam.
The denser closed cell foams will give the best R value but of course the denser it is the more it weighs and it cost more too. Landau padding foam is also a closed cell foam that will insulate, it has lower R value than a dense foam such as Ensolite but it does insulate and it too helps with noise reduction and does not cost as much.
Darn it I have a low ceiling and a tight budget too. I want thin but dense closed cell foam. Fortunately one of the marine businesses in this building just put a bunch of relatively dense orange colored, closed cell foam sheet, leftovers in the dumpster and I spotted it before the trucks came
It is new material, the color does not matter since it will be hidden! Maybe they have more leftovers? Maybe they have a job coming up soon that will require it and might save the extra pieces for me? They can see my Campster
renovation happening from their big windows
upstairs and it is so adorably cute and tiny that perhaps I can get them to consider helping to keep it warm by feeding it their leftovers? If I was still adorably cute and tiny that would be even more of a help in going begging for materials.