我们目前有一个18×30的爬行空间，在地板托梁上发泄了搭配薄塔绝缘。爬虫空间还连接到22×30的完整基底。在爬行空间和用胶合板封闭的地下室之间有一个2'x2'开口，以及用于导管的几个开口。爬行空间地板上安装了氡气缓解系统，塑料覆盖物在爬行空间墙上上升约10英寸。HVAC供应和返回，加热管道都通过爬行空间到房屋的那段部分。它周围有BATT绝缘，但在地方摔倒了。

We live in SW Ohio, Climate Zone 5 and it is usually pretty humid during the summer months. During the summer, the basement will get up to 65% RH and we get a bit of a smell that tells us it is time to turn on the dehumidifier. In addition, we are dealing with mice in the crawlspace and probably other areas as well. Also have lots of spiders.

For the winter I sealed up the two vents (can spray foam/rigid foam) with a plastic vent cover. I put plastic between the spray foam and rigid foam to pop it out if needed later. With the mice, needing to do some plumbing in the bathroom, my thoughts were to pull the batt insulation and use rigid foam on the crawlspace walls.

My initial thought was to use either Thermax or John Manville’s CI Max since both have the thermal barrier built in. But reading Info-512 on buildingscience said the perm ratings are too low and I may have issues moisture buildup between the concrete foundation wall and the rigid foam. I’m not sure if the thermal barrier is code in my area, but wanted to use it to be on the safe side.

John Manville安装说明可以选择使用连接到墙壁的1x毛茸茸条带以及附接到毛皮条带的泡沫板。这将留下一个小气隙，〜3/4“，可以缓解墙壁和泡沫板之间的水分的潜在问题吗？虽然冷基础墙可以诱导冷凝？你会密封泡沫板的顶部吗？

要么if a thermal barrier isn’t needed, go with the regular XPS? Seems like polyiso’s foil facing has the same perm rating as the thermal barrier versions and would still lead to the same problems.

想法？
Thanks!
HD