Another crawl space…
I would like to improve upon the poly vapor barrier that exists on the dirt floor of my crawlspace. I have read“爬虫文章”由马丁借鉴but have some specific questions.
First, a description of my situation. A full basement under the ell of the house leads to the crawlspace under the main house, which is accessible via a ‘basement window’ (the frame of the window exists, the window does not). Roughly 3 and half walls of the crawlspace lie on the outside of the main house (the remaining wall falls under the junction of the ell and main house). The ‘exterior’ walls of the crawlspace are granite blocks which have been sprayed with closed cell foam, the rim joists have been sprayed as well. The remaining portion of the crawlspace wall consists of a cement ‘hallway’ between the basement and the crawlspace access point and a rubble wall. In general, there is no foam on these interior walls.
Questions:
1.）我想使用可行程度的多元化。很可能是6密耳的覆盖在爬行空间的不平坦地板上，包括一些岩石。到目前为止有任何问题吗？
2.）在某些地方的泡沫中，爬行空间的现有聚覆盖物被泡沫密封到外墙上，但它沿着大部分周边未连接到基础墙上。缺乏连接聚泡沫或混凝土砌块/碎石墙的便捷方式，只需将砖/岩石放在塑料顶部，就足够了含有整体水分管理的角度？如果没有，您是否有任何其他想法，以有效地锚定该多件？
3.) The edges of the poly sheets were not taped where they overlap. What is a good tape to use for this purpose? In the crawlspace article I read it indicates using a compatible tape or mastic. What, specifically, would be considered compatible with poly?
4.）在爬行空间的一些更多的行驶部分中，聚在其中的一些小孔。相对少量的缺陷会严重破坏屏障的表现吗？如果是这样，可以拍打它们是足够的，让我不得不安装新的多？
5.）如果我要安装新的Poly，将新材料安装在旧的旧材料是不明智的吗？
6.) Given the configuration of the crawlspace relative to the basement, what might be the best way to incorporate an exhaust fan? There are 2 basement windows along the exterior walls of the crawlspace and 3 in the full basement. Should I incorporate a fan into one of the crawlspace windows and replace the window between the basement and crawlspace to (sort of) isolate the crawlspace (the rubble wall is hardly airtight) or something else?
7.) Looking on the internet, most of the exhaust fans I see move air at much higher rates than needed for the crawlspace (estimated at ~20 cfm for the ~900 sq ft crawlspace). Any ideas who might make more suitably sized fans?
谢谢!!
GBA Detail Library
由气候和房屋部件组织的一千个建筑细节的集合
答复
从水分蒸汽控制的角度来看，几个摇滚乐不是一个问题，即使它不是气密的。在可能的情况下详细说明边缘可能更重要。使用CAN-FOAM或管道乳香将其粘在基础上的石头上将比仅在边缘的岩石加权。
Putting a new layer over the old layer does not cause any problems.
你为什么需要户外用排气扇，甚至在爬行空间和地下室之间？在基础和爬行空间对流之间的基础部分中具有足够大小的窗口，可能是足够的。
抢劫
Q。"The edges of the poly sheets were not taped where they overlap. What is a good tape to use for this purpose?"
答：这是一个关于讨论聚乙烯上磁带性能的文章的链接：Return to the Backyard Tape Test。在我测试的胶带中，聚乙烯的四个最佳胶带是Polyken Shadowlastic，Siga Wigluv，Siga SiCrall和Pro Clima Tescon No.1。
Q。"The poly has some small holes in it in some of the more traveled portions of the crawlspace. Will the relatively small number of defects seriously undermine the performance of the barrier?"
A. No, but you can tape them if you want.
Q。“如果我是安装新的poly, would it be unwise to install the new material over the old?"
A. No.
问：“鉴于爬行空间相对于地下室的配置，什么可能是包含废气风扇的最佳方法？”
答：我同意达娜。目前尚不清楚你需要一个排气扇。
嗨达娜，马丁 -
Thanks for the feedback guys. I will research the tapes and work to minimize gaps around the edges.
我可能不需要为我的配置需要排气扇的想法与地板托梁和爬行空间内的支撑件的良好状态一致。
马丁 -
A follow-up to our prior discussion. I noticed suitable substrates for Siga Sicrall include hard surfaces (e.g., wood, gypsum fibreboard, plasterboard); I have not yet looked for substrate specs for the other tapes. Do you have any insight into, or opinions about, how tapes such as those you tested would work on an uneven dirt floor in a crawlspace? I suspect the ability to effectively adhere the tape may not be as good as it was when you placed your tape samples.
谢谢。
抢劫
这是我的建议：不要过度思考这一点。
Siga Sicrall is an excellent tape. If you wipe the polyethylene seam with a rag or a paper towel, so that it isn't dusty, the Siga Sicrall will stick fine. Press it with your hands so that the poly is pushed against the dirt below when you install it, and stop worrying.