Replies

1. GBA编辑
   Martin Holladay|Mar 18, 2015 02:35pm|#1

   Robert,
   为了避免在外部等级和地板水平之间的区域存在主要的热桥接问题，最好将所有绝缘材料安装在内部或外部。

   If you choose to install exterior insulation, it would be best to excavate down to the footings, and to install one or two layers of rigid foam (or perhaps mineral wool) from the footing up to the underside of the roof sheathing (or the underside of your attic ventilation channel).

   If you choose to install interior insulation, the insulation should extend from your crawl space floor to the ceiling of the top floor of your house. This insulation would be rigid foam in the crawl space; you could choose from a wide number of insulation choices on your above-grade walls.

   有关爬网空间的更多信息，请参阅建造一个未通风的爬行空间。

2. 
   Robert Fordham|Mar 18, 2015 03:37pm|#2

   谢谢你的快速回答Holladay先生。我意图d the article on building an unvented crawl space, I believe the details to get this right would be pretty hard to do on this house because of the way the pillars and bracing are done underneath. Some of the beams are true 4x10s that are only 8 to 10 inches off the ground on irregular shaped pillars. So to get the detailing right I would have to redo some of the pillars and I'm not sure I could get them out without busting them up, which is doable but in less than 12 inches under the joists would be a rather LARGE task and also with the problems that can occur with a well detailed unvented crawl space, listed at the end of the article. Would you recommend doing a vented crawl space, insulating the floors, and doing interior insulation? Or do you see the long term benefit to spending the extra time and money to make a vented crawl space.

3. 
   Robert Fordham|2015年3月18日下午03:40|#3

   Sorry on the last sentence should read Or do you see the long term benefit to spending the extra time and money to make a unvented crawl space.

4. GBA编辑
   Martin Holladay|Mar 18, 2015 03:41pm|#4

   Robert,
   Vented crawl spaces don't work in Georgia, for the reasons given in the article. I suggest that you follow the advice in the article for detailing a sealed crawl space. Even if you can't manage to get every detail perfectly installed, in Georgia an unvented crawl space should still perform better than a vented crawl space.

   The usual solution to a cramped crawl space is to excavate the soil to lower the floor.

5. 
   Lucy Foxworth|Mar 18, 2015 09:03pm|#5

   Robert,
   I spent days underneath a house on piers last year (Upstate SC - zone 3 also, a little cooler than your location) insulating under the floor. And it was a relatively comfortable dry space with 3-5 ft of head space to work in. It was still awful. My neck was killing me. My head was sore from bonking it on the floor joists. Lots of spiders and wasps. Don't do it especially with the limitations you have.

   如果可能的话，最好在爬网空间周围隔热。在外部绝缘可以为您提供连续的绝缘层，没有热休息，您不必失去石膏墙。由于您已经删除了乙烯基壁板和更换窗户，因此这是进行外部绝缘的理想时间。

   如果您使用泡沫，则必须将树林脖子上的白蚁视为侵入泡沫的严重风险。如果整个房屋都是混凝土块，并且无法通过街区，那么您可能会没事的，尽管白蚁隧道会降低泡沫并击败目的。

   I really think the mineral wool insulation board is the way to go. I always recommend the mineral wool option for the south because of bugs and fire resistance. Another option is something like Foamglas, a cellular glass insulation. It's pretty pricey, but you could put that below grade around the house and then foam above. Termites and insects will not be able to get through it.

   //m.etiketa4.com/blogs/dept/energy-solutions/jobsite-foamglas

6. 
   Robert Fordham|Mar 18, 2015 09:51pm|#6

   感谢您的输入露西，我将研究一下。在我所在的地区，大多数承包商都是非常好的人，但所有承包商都有类似的建筑技术。当我向他们询问有条件的爬网空间和外部绝缘材料时（试图获取信息以适合我的特定情况），他们看着我有些有趣。我有一个密友，是一个绝缘承包商，在我所在的地区进行了15年的隔热材料，他在处理空气密封和绝缘材料和HVAC的房屋中是该地区一些最低的能源消费房屋。他说，他只看到了少数条件的爬行空间（他的私人房屋有一个地下室）。他所看到的，安装人员没有得到正确的细节（他们没有留下白蚁检查的空间，房屋在不到7年后出没，另一所房子没有得到适当的排水漂浮在房屋下的膜）。因此，当我试图考虑整个图片并确保我从文章中正确理解时，就很难获得有关做事方式的信息。谢谢