I have old cedar shake siding on a portion of my home, built in the 1950s, and am planning to replace it with a cement siding. Underneath the cedar are nailers, then the open cavity of the wall. In many places there is no insulation, and I plan to add continuous sheathing. I am located in North Texas, with moderate humidity and long hot summers
Can I add fiberglass batt from the outside of the wall?
When I add sheathing, would radiant barrier sheathing be beneficial? With metal on the outside or inside? It would not have the air gap normally required, so housewrap might be a better idea?