As monolithic wall units with continuous insulation and fewer gaps to seal than stick-built framing, structural insulated panels (SIPs) are airtight and effective at stopping airborne ambient noise. However, the panels themselves are less effective at blocking low-frequency sounds.
Plastic foams for thermal insulation have been available for more than 70 years. Extruded polystyrene (XPS) was introduced in 1943, followed by expanded polystyrene (EPS) in 1950, and polyisocyanurate (polyiso) in 1954.
The April 2015 issue featured an article entitled “Selecting Polystyrene Foam Where Moisture Exposure Occurs.” The public relations manager at the EPS Industry Alliance wrote to the magazine, wanting to comment on what he called “several inaccuracies and omissions” he felt slanted the piece in favor of extruded polystyrene (XPS) at the expense of expanded polystyrene (EPS).
The December 2013 issue of The Construction Specifier included the article, “Out of Sight, Not Out of Mind,” by Ram Mayilvahanan. The feature focused on expanded polystyrene (EPS) and included reference to a particular industry study. In response to the piece, we recently received the following e-mail from John Ferraro, executive director of the Extruded Polystyrene Foam Association (XPSA):
The January issue of The Construction Specifier included the article, “Impact of Advancements in Model Energy Codes,” by Jared O. Blum. We received the following letter to the editor from Tim Merchant of the EPS Industry Alliance, an organization representing those in the expanded polystyrene community.
The EPS Industry Alliance has always supported informative articles that advance the knowledge, proper use, and application of foam insulation. That said, the article makes some inaccurate claims … Continue reading Updating values for polyiso