> the guy in it does throw in a bunch of jokes from the perspective of a frustrated Canadian building science guy that might put you off but his information is

> the guy in it does throw in a bunch of jokes from the perspective of a frustrated Canadian building science guy that might put you off but his information is great. As someone else who works with civil (but not structural) engineering in Canada, I agree to a certain extent with his points, but found his tone incredibly condescending and offputting. For example: > Does the dirt, grass, and a goat make it work better? No. But you just feel better about yourself. I mean dirt is not insulation, it's just freaking dirt. If it was insulation we'd put it in our walls, and that'd be stupid. [...] 'well we can store water up there' - Why? You're an idiot. The whole idea of a roof is to get the water off of the damn roof. - Soil is insulating, just with a very crappy K value. You wouldn't use it somewhere that was space sensitive (eg a wall). You wouldn't use it instead of other insulation. But it is absolutely an insulator (that's why we only have to put frost walls 4-8feet deep to prevent frost heave). If your only goal is to insulate the roof better, install an extra inch of rigid foam rather than a foot of soil, it'll work the same. - Storing water where it first strikes is good for reducing site runoff (with safeties installed to cope with bigger rainfall events). > I once found myself driving around with a very environmentally minded person and she refused to turn the AC on in her car but cranked open the window instead. How fast were you driving? There's a breakeven point, depends on the car - I know with mine, it's about 80 km/hr (slower than that, open the window. faster than that, AC is more fuel efficient)