The Psychrometric Chart: 7 Minutes of BS (Building Science)


This chart explains how moisture behaves in the air as temperatures rise and fall—rainstorms, flooding, and glaciers in wall cavities are distinct possibilities.

ViscoElasticity: 7 Minutes of BS (#BuildingScience)

viscoelasticity-construction-tape-stickiness copy.jpg

The science of stickiness: a molecular look at tape's adhesive and cohesive properties

Residential Grow Rooms: 7 Minutes of BS


Extreme heat and humidity can drive moisture deep into framing cavities which can cause mold, rot, and structural damage

Low-E Glass Coatings: 7 Minutes of Building Science


Low-e coatings screen infrared heat from moving through the glass, either inward, outward, or both

Historic Mortar: 7 Minutes of BS


In short, mortar is a mixture of some or all of the following materials: Portland cement, sand, lime clay, and more modern additives.

Roof Ventilation: 7 Minutes of BS


This episode of 7 Minutes of BS was the MOST POPULAR EPISODE OF 2017! Enjoy your trip down memory lane. 


Science: 7 Minutes of BS (Building Science Syncopated)


Science explains the natural world with a disciplined method of repeatable—and verifiable—questions, experiments, and answers


Indoor Air Quality (IAQ): 7 Minutes of BS


Three-pronged solution to indoor pollution: Isolate, eliminate, and ventilate

Vapor Permeance: 7 Minutes of BS—Building Science w/a Beat


Vapor barriers cause a lot more harm than good in many parts of North America. Understanding vapor barriers begins with knowing what it means to be one

Radiant Barriers: 7 Minutes of BS—Building Science w/a Beat


Thin foil can block massive amounts of heat transfer, but it needs a massive temperature difference to be effective. So, insulation sort of makes radiant barriers irrelevant.

Make Up Air: 7 Minutes of BS (Building Science w/a Beat)


Houses cannot expand and contract with changes in pressure like balloons can. Instead, they need paths for air to balance the pressure

Reservoir Cladding and Mass Walls: 7 Minutes of BS


Siding is supposed to shed water away from walls; so what's the deal with siding that absorbs water?


Mechanical Ventilation: 7 Minutes of BS


As houses are built tighter, they exchange less air between inside and outside. This saves energy, but the inside air can get stale if you don't have a fan and a plan

Efflorescence: 7 Minutes of BS


A snowball effect of physics vs. physical structures: water carries salt to the surface of masonry, which crystallizes and can blow apart its masonry host.