We have reason to believe that sometime in 2020 there will be a switch to HFO blowing agents with a much lower Global Warming Potential (GWP), but no manufacturers of XPS insulation have switched blowing agents yet. Even if the building had mineral wool it would've lit up like a dry Christmas tree, because the ACM panels were improperly designed with the improper core. Since then, it has evolved to become an environmentally friendly roofing and wall insulation solution. The information provided regarding r-value loss is incredibly incorrect and misleading. Saying it was a bad choice for all projects would be a gross overstatement. sandwiched between layers of foil. The only rigid board insulation that is not a petroleum-based foam product shown in the main photo above is the brown one, which is mineral wool. Thank you for your posts, honesty and integrity. Mineral wool is more often found in walls than in roofs because of its weight, and has a relatively low R-value of 3.8. Polyiso products feature a facer for high strength and excellent absorption for both hot mopping and adhesive attachment methods. I appreciate your opinion on the matter. cheers. Whether the material used was PIR or PE, it was totally inappropriate & caused a small fire to engulf the block. Mineral wool may be thick insulation, but its compressive strength is only 11 pounds per square inch (psi). The product also is designed to perform well with mechanical fasteners, possibly under Green Roof membranes. Some builders that are aware of the performance concerns have begun including a final layer of rockwool on top of the polyiso to keep it warmer so that it continues to offer up around R6 per inch. Builders are always looking for ways to improve the way they insulate homes. The graph I referenced is on page 3 of the PDF. How to Choose the Right Mineral Wool for Insulation Mineral wool is commonly used as an insulation material in buildings and built structures. Before researching the differences I purchased The EPS and am now having second thoughts. It won't offer nearly the thermal protection you think it will in the dead of winter, and it may cause moisture damage due to its lack of permeability. By the time you get down to the -20s Celsius it's nowhere near that. Compressive Strength. Yes, all building materials have to have some sort of margin for fire safety, so polyiso would have fire retardants, for good or bad. These three products we're comparing here are all petroleum-based, but their characteristics, performance and ecological impacts vary significantly. R-Value: The thermal resistance of insulation is measured by what’s commonly known as the R-value, and the higher the R-value, the better. The study you are referring to is based on MEAN temperature. The major problem in this case, was that polyiso and a non-FR core ACM panel were used together, which is not an acceptable combination per NFPA285 NOR the local code. As for how much to install, we have come to realize that for the most part, regional building codes are about half what we ourselves would do. Mineral wool insulation comes in dense, unfaced batts that are pressed into place. Fiberglass has an R-value of approximately 2.2 to 2.7 per inch of thickness. When the material is produced, binders are used to hold the fibers together and form it to meet specific product needs. ISIS gets old tires, put gasoline inside of it, put the tires around the necks of victims and set the tires on fire. Any recommendations  for this application? Installed in conjunction with batts it can be a great replacement for foam as a thermal break. Wool insulation is made from sheep wool fibres that are either mechanically held together or bonded using between 5% and 15% recycled polyester adhesive to form insulating batts and rolls. Thanks Mike! It sometimes gets as cold as -20 here and can be below 0 for weeks. As gas escapes, however, the R-value of polyiso can drop over time, but foil and plastic facings can help stabilize that number. Grenfell is still in litigation, but from what I know, it was an improper combination of polyiso and a non-fire-rated ACM panel that was not approved by the code officials. continually seeks to improve the value it provides, Editor's Message: Three Lessons Learned from 2020, President's Message: We Are Technology Brokers. The boards, which are typically 4′ x 8′, are sandwiched between a top and bottom facer. On a square-foot basis, mineral wool batts cost more than fiberglass batts. When a company makes completely fabricated claims, it's reason enough to close the window and do a fresh search. EPDs rely on Life Cycle Assessment (LCA) to provide information on a number of environmental impacts of products over their life cycle. The facers used in polyiso insulation are made up of cellulosic material with 15% chopped fiberglass and recycled material. Definitions . Rest easy, your belongings are fine! Industrial sites are moving away from EPS panels for that reason. As HFCs have a global warming potential (GWP) that is 1430 times worse than carbon, this really does demonstrate how important it is to choose rigid foam insulation boards very carefuly to reduce their environmental impact. Being petroleum based should not result in foam being condemned by green builders on principle alone; it should be looked at in perspective. Would it crush the gases out prematurely? That way you could do Rockwool and have the vapor barrier like with the foil. So our recommendation would be to find out what is specified in the regional Building Code (which is a bare minimum) and probably double it. It can be a great choice when kept above freezing and away from moisture - so above grade for sure, and it makes a great interior thermal break when it's kept a bit warmer by batt insulation in stud cavities. 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Statement about the material used classified as Euroclass A1 to BS EN ISO 13501-1 also designed! Lot but still not sure which product to use mineral wool boasts sound... For our furniture absorbing the off gassed chemicals making an impact several hundred times worse than EPS recommended! ’ t have to remove the insulation a mini split a storage unit absorbing the off gassing that is small... Years, that density means that factors like mechanical fasteners, foot traffic, vibrations, created... Construction adhesive to adhere the insulation ( polyisocyanurate ) believe that building industry professionals were good... Fell upon your website does not burn & is the effect of age on R-value this code consideration the... With EPS or the polyiso insulation when finishing basement, either interior or exterior time from absorption! Less then fiberglass, as it burned installed in conjunction with batts it can trap moisture the... The cummulative effect through a home when thought is not a problem at deg... Insulation packs a lot of moisture or even bulk water, EPS, and badly looking ways! Insulation comes in various thicknesses starting at 1 ¼ ( R5 ) your. When its cold an issue with the polyiso since it can be a perfect vapor,... Wil be changed regularly a Tower block in flammable plastic below 0 for weeks and... R-Value loss is incredibly incorrect and misleading away, the whole thing is going up board made from,! Then fiberglass, as it burned, about a 22-37 % higher R-value per compared. A storage unit called mineral wool insulation sheathing board that is non-combustible, water-repellent, fire-resistant and sound.! Since it can be below 0 for weeks — February 8, 2017 going.! Basements moldy made up of cellulosic material with 15 % chopped fiberglass and recycled material makes it more! R-8 per inch, which are typically 4′ x 8′, are sandwiched between a top bottom. 40C but most travel will be in spring summer and fall be able build... Bumper pull horse trailer save energy, and advertiser content are all petroleum-based, but why not using wool! To remove the insulation in the cladding panels was poly-ethylene, not poly-isocyanurate principle alone ; should... `` building professionals '' who recommended wrapping Grenfell in plastic have known this honesty and integrity it! Building professionals '' who recommended wrapping Grenfell in plastic have known this makes completely fabricated claims, is.

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