答复

1. 
   user-36575|2021年10月14日，下午2:04|#1

   Other things that might be useful: utility knife for scoring foam board (you can use 2x4 for straight edge?), tape measure, rags and/or paper towel for wiping off foam and caulk nozzles. If you're using canned foam, you want to be in disposable clothes. A full painter's suit from Home Depot or similar over shorts and a t-shirt is often more comfortable in the attic.
   您将如何将挡板固定在适当的位置？钉书钉>主枪。

   您可能还想搭起一小件胶合板，该胶合板足够僵硬且足够大，可以跨越桁架，以便您拥有一个工作平台，而不是小心地踩在桁架上。

   Depending on the type of insulation you have, you may wish to have something to move insulation around and/or hold it back, and then to re-fluff the insulation if possible.

   Hope that gives you some ideas that can save some trips up and down,

2. 
   walta100|Oct 14, 2021 02:22pm|#2

   您的计划是要使您碰巧看到的每一个裂缝和关节都能看到吗？

   When I was filling gaps I found “fire caulking” to be more effective than the foam and less messy. After I applied a bead and then push the caulk into the gaps with a gloved hand.

   https://www.homedepot.com/p/3M-10-1-fl-oz-Gray-Fire-Block-Specialty-Sealant-FB-136/100390499

   Before you get into the attic you may want to create a pressure differential to the outdoors by taping a box fan into a window and locating the leaks with incense sticks and seal as many leaks downstairs as you can before getting into the attic.

   A few pieces of plywood large enough to bridge the joists and sit on, maybe nice to have.

   If you need to move old insulation out of your way a rake broom and a shop vac could come in handy.

   沃尔特

3. Expert Member
   比尔·威奇斯|2021年10月14日，下午2:31|#3

   一个好的无绳LED灯，明亮的灯确实很有帮助。我真的很喜欢Ryobi的大型LED泛光灯 - 它很便宜，真的很明亮，而且很长一段时间。几乎所有无绳工具制造商都将具有类似的东西。

   +1一些胶合板！您想要3/4英寸的胶合板。我喜欢两件：一个大约是托梁之间的跨度的1-1/2倍，而另一个跨度约为跨度的2-1/2倍。这使您可以跨越并四处走动。一定要切割所有的超大尺寸，您不希望在这里进行任何精确度 - 您希望能够在需要的任何地方随机地插入平台。

   Knee pads and/or a good kneeling pad are helpful.

   如果您要穿着松散的填充隔热材料（尤其是玻璃纤维爆炸），我强烈建议您穿一件完整的Tyvek西装（带连帽衫和脚部覆盖物的西装）。这将大大减少您必须处理的瘙痒量。

   允许更多的时间比您想象的要多。阁楼的工作并不有趣，而且很乏味。我还建议您提供一些您喜欢的饮料。您可能会出汗很多，您会口渴。

   Bill

4. 
   Shrews01|2021年10月14日下午5:50|#4

   Any advice on air sealing where my supply plenum exits the first level through the ceiling and goes into the attic?
1. Expert Member
   比尔·威奇斯|2021年10月14日，下午7:40|#7

   I would use the softer "door and window" canned foam here. The softer foam will be less likely to seperate and leak due to vibration of the ductwork. You'll need a heavy application of the stuff, ideally wrapping around both sides of the edge of the drywall a little to help hold the foam layer in place.

   Note that a more elegant solution would be to use a sheet of EPDM to make a sort of flexible grommet, but that would be very difficult to install after the duct is already in place.

   Bill

5. 
   paula_builds|2021年10月14日，下午6:46|#5

   I am pretty into the duct seal putty - put it around the ducting penetrations as well as around exterior electric boxes. What do people think about the longevity of duct seal putty? I found it really sticky and good for covering wider and narrower gaps. It's supposed to stay soft. Thoughts?

1. Expert Member
   比尔·威奇斯|2021年10月14日，下午7:38|#6

   You have to really work this stuff into the gap to keep it from loosening over time and seperating. You can't always see when it seperates, but if you wiggle it you'll feel it move free from the surface. That's not a good air seal :-) I find that the material itself does eventually get hard and fail, but it tends to go 10-15 years or so, maybe more. The more exposed to sunlight it is, the more towards the low end of the lifetime range it will get. This material is very commonly used by electrical contractors to seal around conduits where they go through walls, especially masonry walls.

   Bill