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I’m republishing this article from a couple of years ago as BWS #11/28 because I still think it’s clever and no one has argued with me about it yet. Come

Heat gains and losses is complex discussion. You literally need complex software and skills to even begin to predict the energy use of a building and if then you’re probably

You should test the weather tightness of a curtain wall, windows, and designs under cyclonic winds, rain, and earthquakes but you shouldn’t think that is a guarantee of performance in-situ:

When talking about building enclosure performance, we commonly refer to control of the following elements: water, heat, and air. Controlling the free flow of these elements across and into the

Remember procedure BW from BWS005? The one that looks like a roof? Well let’s use that same idea for a wall underlay that is pliable and see if water drips through.

A test for the waterproof-yness of a waterproof membrane. Is the waterproof membrane actually waterproof? Seems like a completely fair question to me. Well funny enough, in NZS 4858, our

Standards are not a replacement for mastery, they are not a best practice guide, they aren’t even applicable in many cases. They are just a benchmark of some sort of

We’ve totally fucked this one up. Energy use in buildings is complex and difficult to predict even for the smartest of people (performance gap explained here) and even with the

Nope, not doing a dog impersonation here. Before I explain what WUFI is, I think I first need to explain why it exists. For decades, we (building scientists) have been