Category Archives: Air Sealing & Insulation

Getting the details right: Air barrier behind the shower & tubs


Table N1102 is an interesting part of the codes as much of what is required isn’t listed elsewhere in the codes & can even occasionally be contradictory to what is allowed in other sections. (i.e. all headers must be insulated while ones under 4′ can use solid 4x stock) While not a huge issue, one item […]

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FAQ: Are all air leaks equal?


When it comes to air-sealing a home many people wonder if all air leaks are as important as others. For most the answer is simple – NO. Without any doubt most professionals will say that sealing the leaks up high (i.e. the attic) is the most important. Below is a form used by Maine which shows their […]

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BS4D: Are “vented” cantilevers bad?


I know you have seen it, the vented panels on eaves, porches, and cantilevers. Sure we know that in most cases they are not venting anything & this was done quite simply because someone thought it looked right, or that might be the only material handy, but to be qualified as a bad thing? “Sure […]

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Insulation Issue, the fix & prevention


Last Wednesday as you may recall I showed you this picture from a house that had already passed the pre-drywall inspection which any rater or inspector out there could tell you should have failed. This leads to a few questions, just how did it pass, why did it happen, what was the fix & more even more importantly […]

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Getting the details right: Fully Aligned Air Barrier


Don’t you just love engineers & others that use terms like fully aligned air barriers, or in code speak require that insulation be in “substantial contact and continuous alignment with building envelope air barrier…”? I think the term many are thinking of is, clearer than mud. This is one reason why we end up with […]

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BS4D: Ice Dam’s, Icicles & Attic Condensation, Oh My…


Living in Arizona, I used to love traveling up to Flagstaff especially during the winter months. One of my favorite places was the Little America as not only did they have a huge roaring fire, an awesome buffet, great Christmas light display, but some of the largest icicles I have ever seen. Ahhh if I had […]

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Air Sealing: The Duct System


For many the easiest way to describe HVAC / Forced Air system is to equate it to one’s own heart. With that in mind, the duct system in one’s house is comparable to the veins & arteries in your body. The supply ducts bring nicely conditioned air to all the parts of the house that […]

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Air Sealing: Attic Floor Insulation

pot light not air sealed infrared

Adding more insulation in your attic is often seen as one of the easiest ways to help save money and increase comfort in your home. While this is generally true, all too often the items need to be done are either simply overlooked &/or buried. That is one reason why we have held off on […]

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Air Sealing: Attic Baffles


Ever wonder why your outside walls feel so bloody hot during the summer, and oh so cold during the winter?  Well unless you have an older home with no insulation, in many cases it isn’t the actual wall, but a popular cost saving measure that is taken by many contractors – no attic baffles being […]

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Air Sealing: Sealing those Attic Penetrations


In our last few articles we have been focusing on the attic; namely creating an insulated attic hatch, and creating a means to store items & walk through the attic without disturbing blown in insulation. We have been spending a lot of time focusing on the attic as it is one of the most overlooked, […]

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