Quote Originally Posted by nova_robotics View Post
I dunno. I didn't know that. I guess I am that stupid.



Right there with ya. Rockwool is a spectacular product. I did my basement with Rockwool. It's a toss up between Roxul and blown-in cellulose for my favourite insulation. I like that cellulose has boron salts so you can add fireproofing, convince the rodents to move out, and insulate a building space all in one shot.
Belinda even mentioned it.

I remembered about that from Corning glass information that I read and then later watched a few fairly in depth videos about glass production properties.

Agree on both types of insulation.

If you are a contractor and simply looking to fulfill minimum to code specs then sure use the fiberglass. If you are thinking long term that is a whole other situation. The last place that we built we did an R 32 of Rockwool and then another 18 inches of cellulose over top of that. Roughly R 50.

In your basement did you leave about 16 inches of no insulation at the bottom? Well 14 1/2 actually counting the bottom plate.

This was a recommendation in the building code that I had from 2002. Same for vapour barrier on the exterior side of a basement wall as well as the interior of the basement wall. I'm not sure if that was raised to the level of full national building code practice.