Division 7 Ebook Page 545 FOAMULARŪ XPS Insulation & Insulfoam R-Tech Comparison

Technical Review FOAMULAR Rigid Insulation and INSULFOAM R-Tech Comparison A Close look at XPS and EPS with a Polymeric Skinned Surface plastic is that it conceals the path that insects use to gain access to a building food source. If insects travel behind the treated board, the treatment is ineffective, therefore the Insulfoam disclaimer that the treated board "should not be considered a barrier system." These practical facts are the reason why some property insurers will not warrant "treated" insulation boards on homes, despite building code provisions that may accept treated insulation boards. Without termite insurance, home sale and re-sale is blocked and "treated or not treated boards" are a moot point. Do reflective foil facers add R-value? Yes, but only if installed in the rare proper application. As stated in R-Tech literature, reflective films can add thermal resistance if the metallic film is placed toward a dead air space. What is not stated in R-Tech literature are other important caveats necessary to gain thermal resistance from reflective surfaces. Chapter 25 of the ASHRAE Fundamentals Handbook states the "air space (must be) of uniform thickness, bounded by plane, smooth, parallel surfaces with no air leakage to or from the space" Those conditions rarely exist in real construction, such as masonry cavity walls, where the back of the brick is neither plane, smooth nor parallel due to mortar extrusion from joints. Also, air spaces in masonry cavity walls are typically ventilated to allow for drainage and air circulation. All of these details minimize the value of reflective surfaces in most masonry wall air spaces. And, it must be noted that cavities in masonry walls exist to drain water. They are often wet. A wet masonry cavity is not a good place for EPS insulation that absorbs water. Is it necessary to treat polystyrene board to make it mold and mildew resistant? No. Untreated, unfaced FOAMULAR XPS rigid foam insulation was tested according to ASTM Method C665-98 and C1338-00. This is a 28 day comparative test to determine whether insulation materials support no greater growth of fungi than the surrounding materials of the structure being insulated. For ASTM Method C1338-00, five fungal cultures are used: Aspergillus niger (American Type Culture Collection 9642), Aspergillus versicolor (ATCC 11730), Chaetomium globosum (ATCC 6205), Aspergillus flavus (ATCC 9643) and Penicillium funiculosum (ATCC 11 797). Microscopic examination of the test insulation material after 28 days incubation showed no fungal growth. That said, mold and mildew can grow on any surface if mold spores (abundant in the environment), adequate temperature (40o to 100o F), food (such as dust films), and moisture, are present. Mold spores, temperature and dust are beyond our control. So, the key is to choose insulation materials such as FOAMULAR XPS rigid foam insulation that discourage water absorption and accumulation. Is it true that R-Tech is "CFC Free"? It is true, just as it is true that FOAMULAR XPS rigid foam insulation is also CFC free and has been since 1992, the year of the international mandate of the Montral Protocol. In 1992 FOAMULAR rigid foam insulation converted to an HCFC blowing agent, known to be 90% less ozone depleting than the previous CFC system. By January 2010, HCFC's will be eliminated and replaced with an even more environmentally friendly blowing agent system. While expanded polystyrene (EPS) is not made with CFCs or HCFCs, it has the environmental drawback of pentane emissions during manufacturing. EPS is produced by expanding styrene beads using pentane gas, a hydrocarbon that contributes to localized smog production. Pentane gas can contribute to low-level smog formation. An important fundamental point is that all insulations save energy. In so doing, insulation lowers the demand for energy generation which lowers the overall production of green house gases. All insulations are a net benefit to the environment. Is R-Tech awarded LEED points for transportation in the NW? No. Individual products are not awarded LEED points. The regional extraction and manufacture credit in LEED is a weight and cost based calculation based on all materials (not individual materials) used on a given project. Even if included,

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