Reply to How come more new builds don't use all concrete?

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]Concrete is terrible for the environment.

https://amp.theguardian.com/cities/2019/feb/25/concrete-the-most-destructive-material-on-earth

https://psci.princeton.edu/tips/2020/11/3/cement-and-concrete-the-environmental-impact

https://climate.mit.edu/explainers/concrete

https://www.fairplanet.org/story/concrete-climate-change-environmental-injustice/

https://www.greenspec.co.uk/building-design/environmental-impacts-of-concrete/[/quote]

Maybe the initial cost upfront is more to the environment, but concrete structures use a lot less heating and cooling over the lifetime of the structure. How much environmentally better is building a home with cheaper materials if you have to constantly fix it or even knock them down and build new again when they've reached their end of life? Concrete can last for way longer.[/quote]

I'm still waiting for you to provide the r-value numbers that show that a concrete building is better-insulated. [/quote]

Concrete or wood isn't the only thing providing the r.

But 60lb concrete  has r of about .52/"  4" would be +/- 2.   1" Sheathing is about 1.25.  But there are still a lot for places for loss. ie joints/intersections of multiple elements, fasteners etc.
[/quote]

To put those numbers in perspective, this is what is currently code minimum in DC:

Walls have to have either R20 inside the wall and R5 of continuous insulation, or R13 inside the wall and R10 of continuous insulation.

Construction has to be tested for tightness using a blower. The air infiltration can be no more that 3 ACH50.

That is code minimum -- the worst house you are legally able to build.

So tell us: what R-value is your concrete house?[/quote]

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