Roxul安慰董事会与Thermafiber RainBarrier
Any differences I should be aware of before I choose? I am wanting to use mineral wool for exterior insulation on a wood frame, two-story dwelling. Very impressed with Roxul online information, technical specs etc. Can’t find much about RainBarrier, other than the company info sheet, but it’s 1/2 the price of the Roxul. Thermafiber says that the Rainbarrier HD is the product they have made to be comparable to Comfort Board, but cannot find any comparisons between the two.
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What kind of price quotes are you getting? I would be very surprised at a 50% price difference for an apples to apples product.
You might also want to get pricing on Roxul Rockboard 80, which is (from what I can tell + talking with a rep at a trade show) more or less the same product as Comfort Board IS, but is generally lower priced ("different distribution channels" is the pat answer that I get). Folks here in Virginia have been getting Rockboard 80 at roughly $0.40/ft2.inch.
RainBarrier is 6lbs per cubic foot, R4.2 per inch, and can be had in thicknesses up to 7" (!).
http://sweets.construction.com/Manufacturer/Thermafiber--Inc--NST43484/products/RainBarrier-HD-Continuous-Insulation-NST59696-P
ComfortBoard IS is 8lbs per cubic foot and R4.0/inch, but somewhat less air permeable.
两者都是非常好的产品 - 如果您能以舒适板的一半价格获得Rainbarrier，那么很难为更昂贵的更高密度而又较低的R产品提供理由。我怀疑较高的密度货物更加刚性，但是在6磅密度下，它不会完全软盘。舒适板顺式是11磅的密度，可能明显更硬（尽管我不能说我并排比较了它们。）
What affect does air flow in a rainscreen wall affect the performance?
At these densities (more than 2x high-density batt densities) thermal performance is not affected by the lack of a true air-barrier. With direct wind washing and high wind it might be. At the air flow rates in a rainscreen gap it is probably not measurable.
如果您希望使用热铁纤维进行持续类型的外部绝缘装置，请疲倦，Thermafiber Rainbarrier 45的抗压强度为67PSF @ 10％和185PSF @ 25％。Rainbarrier HD为76PSF @ 10％和256PSF @ 25％。舒适板的密度为8.0/lbs cu ft，几乎是Rainbarrier抗压强度的10倍以上。舒适板为 @ 10％为745PSF，25％为1270psf。这很大。根据Thermafiber Tech的支持，您将需要僵持或袖子来阻止压缩。与Roxul，您不这样做。建筑科学公司已经对外观上的Roxul使用进行了研究，以测试是否有垂直变化，并查看舒适板是否压缩过多。好东西.....
http://www.roxul.com/files/RX-NA_EN/pdf/tech%20data/110816%20Roxul%20ComfortBoard%20Final%20Report.pdf
http://www.roxul.com/files/rx-na_en/pdf/technical%20bulletins_guides/13A08%20ROXUL%20COMFORTBOOD%20IS%20IS%20Application%20Guide%20Guide%20-20-%20-%2004-2004-11-201-2014.pdf
http://www.roxul.com/files/RX-NA_EN/pdf/ComfortBoard%20IS.pdf
感谢您的回复。经过相当多的考虑，我们将在外部茎壁上使用泡沫状，并正在更改系统以具有较高的内部R值，从而使外部绝缘更灵活。由于这个原因，我们遇到了同样的密度问题，并最终离开了它。Roxul是一个很棒的产品，但是等待时间为8周，价格也很高。FWIW我们打电话给Virgina Beach Home Depot进行Roxul Quote，发现从弗吉尼亚州购买的价格约为44％，并将其运送到俄勒冈州的商店。我们对自己的工作完全诚实，那个人说这很好，他对价格差异不确定。他说这对他们来说是一种新产品，这可能是为什么？感谢你的帮助！
Caitanya,
Be weary of the ratio of insulation on on the interior to the exterior. Before finalizing your decision, search for on discussions and articles on that here, and at Building Science Corp.. There is an optimal ratio basis on climate location (zone) to reduce/prevent moisture problems at the sheathing and inside the wall cavity.
Dana Dorsett, Martin both have excellent understandings of this.