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- The best rigid foam insulation options include12345:
- Polyiso (Polyisocyanurate): Offers the highest R-value per inch (R-6.5 to R-6.8) and is environmentally friendly.
- Extruded polystyrene (XPS): Has an R-value of R-5 per inch and is easily identified by its color (blue, pink, or purple).
- Expanded polystyrene (EPS): Has the lowest average R-value (around R-4 per inch) but is the least expensive.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Choosing the right type of rigid foam insulation involves weighing various factors including cost, environmental impact, and insulation needs. While EPS and XPS offer certain benefits, Polyiso—particularly Rmax Polyiso— has emerged as the best option for most applications due to its high R-value, moisture resistance, and eco-friendly attributes.www.rmax.com/blog/types-of-rigid-foam-board-insu…The R value rigid insulation numbers show that rigid insulation performs better than other insulation types in most cases. Polyiso is the top rigid insulation performer at R-6 per inch and closed-cell spray foam is the top performer for non-rigid insulation at R-7 per inch.www.rmax.com/blog/rigid-insulation-r-valueThree rigid-foam choices
www.finehomebuilding.com/2009/05/01/which-rigid …Foam board made from polyisocyanurate (polyiso) generally offers the best insulation capacity and 6.5 per inch. Water is the primary "blowing agent," making it one of the most environmentally-friendly foams used. Of course, it is still sourced from petrochemical materials, thus increasing the embodied energy footprint of the product.www.buildwithrise.com/stories/rigid-board-insulatio…Polyisocyanurate (“polyiso”) foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation. Extruded polystyrene (XPS) comes next, with a rating of R-5 per in. XPS foam is easily identified by its color (blue, pink, or purple) and shiny surface.www.thisoldhouse.com/insulation/21072263/insulat… Which Rigid Insulation Should I Choose? - Fine …
May 1, 2009 · Get the Right Rigid Foam – Foam-board insulation can boost R-value, slow thermal bridging, and control condensation—but you better …
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Get the Right Rigid Foam - Fine Homebuilding
Foam-board insulation can boost R-value, slow thermal bridging, and control condensation—but you better choose the right type.
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Your rigid foam layer needs to be thick enough to prevent condensation problems. A conservative approach calls for at least R-2.5 of rigid foam in Climate Zone 3, at least R-5 of rigid foam in Zones 4 or 5, at least R-7.5 of rigid foam …
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Jan 24, 2012 · Rigid foam insulation can be used on walls, roofs, and foundations, and it is suitable for retrofits and new construction. In this article, learn about the different types of rigid foam insulation and how to choose the right one for the job.
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Jul 15, 2010 · All three types of rigid-foam insulation—expanded polystyrene (EPS), extruded polystyrene (XPS), and polyisocyanurate—are suitable for use on the exterior of walls and roofs, though they do not perform equally. EPS is …
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Nov 10, 2011 · One of the best ways to insulate a roof (whether sloped or flat) is to install rigid foam on top of the roof sheathing. Exterior foam can reduce air leaks, limit condensation at the sheathing layer, interrupt thermal bridging through …
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