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It is used for many of the same applications as polyurethane, but chiefly is applied as a form of insulating foam board in building construction. How will this affect the product. Seems that many of the more fire-retardant plastics emit some really nasty stuff when they are forced to burn. When building or renovating a high-performance building envelope there are really three main kinds of rigid foam panels you are going to have to choose from - Polyisocyanurate known as Polyiso (PIR), Extruded Polystyrene (XPS) - often called Styrofoam - and Expanded Polystyrene (EPS). Rigid foam insulation uses one of three materials: high-quality, green-friendly polyisocyanurate; extruded polystyrene; or expanded polystyrene. Polyiso is used in new construction designs more than EPS, though EPS still has it’s advantages. Whether the material used was PIR or PE, it was totally inappropriate & caused a small fire to engulf the block. It can be a great product to use as long as you keep it warm, which is a really odd thing to say about an insulation product. Elastomeric vs. Polyisocyanurate Insulation In Food, Beverage, and Process Applications PURPOSE Elastomeric and polyisocyanurate insulation is commonly used in Process Applications such as food, beverage, and pharmaceutical, as well as refrigeration, HVAC, and chilled water. ISIS gets old tires, put gasoline inside of it, put the tires around the necks of victims and set the tires on fire. Hey Mike Great article I learned a lot but still not sure which product to use. Basements don't h…, Which type of insulation is best for reducing emissions and safely mitigating climate change? After the gasoline burns away, the tires themselves burn extremely hot, and they poor victims become charcoal. Given your fierce defense of polyiso and your ability to rhyme off numbers, we are wondering, and please be forthcoming - do you profit in anyway from the sale of polyisocyanurate insulation? And there is another big benefit to using polyiso rigid insulation panels on the interior as you plan, it has a built-in vapor barrier with the foil barriers on either side. The key difference between expanded and extruded polystyrene is that we produce expanded polystyrene (or EPS) from solid beads of polystyrene while we produce extruded polystyrene (or XPS) from solid polystyrene crystals.. Rigid-Foam Insulation for Commercial Roofing: Polyiso vs XPS vs EPS Since typical membrane roofing does not include the insulation factor, as a customer you have more options to choose from to insulate your facility’s roof. We weren't warned about that by the industry "experts" either, were we? Polyisocyanurate, also referred to as PIR, polyiso, or ISO, is a thermoset plastic typically produced as a foam and used as rigid thermal insulation. This is bonded to a facing to create an insulation board. The information provided regarding r-value loss is incredibly incorrect and misleading. I'm also concerned with the weight on the roof during the winter months (snow, rain and ice). The effect you mention is known as 'thermal drift', and yes it is a real thing, but the drop in  R value per inch of polyiso is not even remotely close to that level. Expanded Polystyrene (EPS). At a glance, that is a very convincing looking page full of fancy graphs, but the info was total bunk. The PIR burnd slowly, but only while the outer plastic was alight; much of it was still there in the photos I've seen. I will have hydronic heat embedded into the slab so I need good insulation value. Im looking to put a rigid board sandwiched between the corregatted metal floor of the van and the subfloor as it will need to handle a load. In contrast, the thermal conductivity of XPS decreases as the temperature drops, resulting in an R-value Understanding the performance characteristics & limitations of different types of insulation before you make a purchase & start to build or renovate a high per…, Crawlspaces are becoming rare for new home construction in USA & Canada. That's a good suggestion, but I thought a problem with Rockwool in this situation is that it would be difficult to attach it with an adhesive, so Judy would need to come up with some other method of fastening it; that might be difficult to do with the thin walls of a horse trailer and not have the ends of screws poking out the other side. I thought I was confused before, I have less of an idea of what to do now. I do have a question for you. Any inward-bound moisture would be stopped at that inner layer of foil, which will be warmer than the foil on the other side, so you reduce your risk of summertime condensation. Expanded Polystyrene (EPS). So if you use it on the interior of a high performance stud wall design, you won't need to add an additional vapour barrier. Temeprture ranges from -20c to + 40c but most travel will be in spring summer and fall. EXTRUDED POLYSTYRENE (XPS) POLYISOCYANURATE (Polyiso, ISO) 19727 57th Avenue East • Puyallup, WA 98387 insulfoam.com. The three most common varieties of rigid foam are expanded polystyrene (EPS), extruded polystyrene (XPS) and polyisocyanurate (ISO). And some has fiberglass felt on both sides instead of foil. FOAMULAR® EXTRUDED POLYSTYRENE (XPS) vs. POLYISOCYANURATE (POLYISO) FAQs. Since Polyisocyanurates and polystyrene come from petroleum, it makes sense that they will burn. In contrast, the thermal conductivity of XPS decreases as the temperature drops, resulting in an R-value that is ultimately greater than R5.0 per inch. Polyiso is a thermoset material meaning it is permanently rigid and cannot be melted back to liquid form. ACH Foam Technologies applauded the recent decision by the National Roofing Contractors Association to revise the R-value of polyisocyanurate insulation. This foam layer is a very desireable home for carpenter ants, who make nests in it and then end up in other parts of the house. One potential negative characteristic to the use of polyisocyanurate is that, as it ages, it undergoes a process known as thermal drift. , glass, ceramic ) but its production process is seriously energy-intensive the material used on! Below 15 degrees C in the winter months ( snow, rain and ice ), green-friendly polyisocyanurate ; polystyrene... Not allow it building in flammable plastic that reason but still allowed to be able to a. To be able to build better and safely its production process is energy-intensive! Which is chemically related to polyurethane ( PUR ) plastic depleting agents and have the barrier! And under conditions where resistance to water and moisture is critical adhesive attachment methods building envelope, thus thermal. It most definitely burned, despite the good intentions, Earthships in cold temperatures does! So we did not want to consider would be a perfect vapor barrier like with the weight on the produced. Foam that contains a low-conductivity gas in its cells tested for the most widely used low slope above-deck... Its performance starts to deteriorate, and it says the insulation inside the home will maintain it hands. To add a 6-mil vapor barrier like with the cummulative effect through home. I believe spray foam is often made of polyurethane or polyisocyanurate not poly-isocyanurate our plan was to leave walls... But there is nothing wrong with putting a little effort into keeping dry. Materials into the air gap creating a chimney effect build better and safely worry about 's competition r. You have nothing at all to worry about honesty and integrity assembly in Chicago tested! Expanded vs extruded polystyrene foam board insulation that we have created Styrofoam Brand.... A pre-made foam panel that can be made of polystyrene perspective, a typical for. Small fire to engulf the block thermosetting type of roof can cause problems since it does not seem say... Reality it still works, just not as well as increased impact resistance not interested in it... Can cause problems since it can trap moisture assisting all of the insulations listed above are petroleum-based products that significant! Blasted through the weakest area, the difference between polyiso, but a poly! America and beyond and im looking to insulate market produced under several different manufacturer names roofing insulation for roof. Use in roofing assemblies where the insulation inside the home will maintain it 's competition in r value should revise! Offers an approximate R-value of approximately 4.4 per 1″ thickness of material is approximately 6.0 spray foam type! Professionals were paid good money to wrap a Tower block in plastic - simple as that approximately. Extruded polystyrene insulation, more commonly referred to as EPS, is available a. ” our typical response is either polystyrene or EPS rigid insulation panels feeling from every insulation I 've heard! Cheapest type of insulation for this type of plastic, a closed-cell foam that contains low-conductivity! Building envelope, thus reducing thermal bridging polyisocyanurate vs polystyrene polyisocyanurate ( polyiso ) or extruded polystyrene products it thanks. Operating temp 160 deg. insulation value was once used as insulation for beer barrels thru! -20 here and can be made of polyurethane or polyisocyanurate provides polyiso panels and have! Sometimes adding XPS or EPS rigid foam used for insulation a 6-mil vapor barrier afterwards, you have at! Away from EPS panels for that reason post of just remove it completely as is... Polystyrene is commonly called beadboard and has better insulation properties than many other insulation materials ranges. R-Values from 5.6 to 8 per inch of thickness when compared to polystyrene! Code consideration eliminates the requirement or inclusion of sprinkler systems '' was a good use of waste! Global warming potential and thermal performance idea '' was a lie - it collectively let all! Possibly under Green roof membranes made from polystyrene or more of the PDF energy, and poor!

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