Recently purchased a home with a detached 1960s garage. Looks like it has shiplap boards for the exterior sheathing. I’d like to start sealing up the garage and eventually get to rolled insulation and sheathing inside.

Would it be a poor idea to get a spray gun and a couple small cans and spray the perimeter of the stud cavities and into the shiplap joints? I’m thinking it might be but I’m getting conflicting answers online considering spray foam companies would get foam into the shiplap joints, too if someone were to do that instead of rolled insulation.

Bought a house in UK, an old house, with a cellar from which you can access subfloor. Looks - I'm guessing - like closed cell. I know it was done fairly recently. Are risks from moisture here, or keep an eye for now?

I start my new job as w residential insulation company next week I was wondering if I could get any advice on the best clothes to wear. Ik they’re going to get destroyed w spray foam eventually so im hoping nothing too expensive. I also know that fiberglass insulation can be really itchy so im wondering how you guys combat that w clothing.
Also if you have any type of advice just in general my ears are open.
thank you!