Here’s an example of an all too frequent attic air-sealing defect. Very often dropped soffits and chases are left open to the attic, providing big connections between the attic, the basement, the framing, and the outside. A leaky envelope means you’re wasting energy, wasting money, allowing dust and perhaps critters to enter your home, and often creating comfort problems.
In this case, a partition was built out to create the third side of a tub/shower enclosure. It does work to make the tub fit perfertly between the enclosure wall. However, when the original carpenter did
We fix this by crawling through the attic and sealing the hole with rigid or semi-rigid material. Here we’ve used foam fan board since the hole was only several inches across. Larger holes might new something stronger like plywood. After sealing, the material needs to be strong enough to support the 10-12” of cellulose that we’ll add to the attic.
- The hole is sealed with rigid foam and expanding foam. After sealing other attic leaks, this with be covered with insulation.
There are great ways to avoid this when building a new home. And we can certainly fix the problem in existing homes. It is important, though, to rid yourself of these issues to ensure you home is comfortable, safe, and efficient.