When I got the home inspected a couple of years ago there were a few pieces of advice the inspector gave me to improve the house one of them was to insulate this part of the house. 

His advice was:

>Get a piece of self-adhesive foam insulation with aluminum facing and stick it up there.

I've been trying to talk with people a lot of times over the years and when I ask for this I typically get crickets back. So I've talked to a few more people when I've been a lot less aggrevated about the problem and recently was told "Don't go to home depot, go to a lumber yard". Going to the lumber yard the guy didn't want to help me at all because he said "Even though I sell insulation I am not an expert for all insulation situations". And also that I don't have enough advice from the home inspector for him to know which insulation to sell me.

>I'm assuming you need rigid insulation for there.

I've been watching DIY insulation videos and the closest that gets to my issue is I think this one from 13 years ago:

[https://youtu.be/zd9RKeTrdXI?si=bsWKWcuCe1V46WZC](https://youtu.be/zd9RKeTrdXI?si=bsWKWcuCe1V46WZC)

The insulation he uses is Roxul ComfortBatt R30 (for US) which I don't know if is easily available.

The main issue I'm having is I think I'm going to have to cut the insulation myself which I am pretty sure I'm going to fuck up.

**TLDR**: New homeowner trying to DIY my insulation under an overhang/bump out section of my home. 

Getting too many conflicting pieces of advice about insulating a bump out area from foundation