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Best Practices Manual
Sealing Building Penetrations | HGTV
Photo by: Comstock. Until recently homes often relied on air leakage for ventilation. Stale air, odors and irritants would leave a home through cracks and crevices and fresh air would leak in to replace it. The problem was that irritants and odors from the outside would leak in as well, not to mention all the wasted heating and cooling dollars that would also result. Now an independent consultant specializing in environmental building issues, Seville stresses that well-sealed homes are far more comfortable and healthy for their occupants. For best results, use a combination of the following materials. As always, read the manufacturer's label to make sure the material is applicable for a particular situation.
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So when we punch a hole through this system we must proceed with caution, ensuring that we maintain the integrity of the building envelope. A moisture management system is only as strong as its weakest link. Proper planning and sequencing will ensure that every penetration is correctly detailed. The following is a list of various wall enclosure penetrations that are frequently encountered on a project:. Wires should be consolidated into as few penetrations as possible and routed through a plastic pipe that can easily be sealed shown below.
The vents and pipes that penetrate exterior walls and the roof bring the power, water and gas lines into a house, but they can also bring in drafts, mold and wood rot. Ignoring these breaks in a building's thermal barrier threatens the durability of the house and the health of its occupants. Knowing where these penetrations are and how to seal them makes it possible to reduce utility bills, prevent drafts and stop the infiltration of moisture and all the problems that come with it. The "best practice" is simple, and often overlooked. Flashing, an insulating expanding foam, or in some cases, caulk, can be used to seal these penetrations and prevent the problems.