From the owens corning chart, you'll get 17% better insulation with the R21 product that is intended for 2x6 walls.
http://www2.owenscorning.com/literature/pdfs/10017857%20Building%20Insul%20Compressed%20R-Value%20Chart%20Tech%20Bulletin.pdf
In 2012 when I built a new home, I had 2 inches of...
I have a 2013 model Direct Lift 2-post and a 2014 4-post. No problems with either one. I have no idea whether they have a bad reputation or not. I bought from the nearest dealer, (60 miles away in Denver) and had both installed, since I have no equipment to lift heavy pieces or help available...
The pros who installed my lift drilled all the way through the 6" floor. They told me that if a bolt didn't torque-up or if I just wanted to move the lift to a new location, they would pound the bolts down into the ground below.
Epoxy anchors should be able to be torqued in a day or two. The...