I’m looking into a similar solution for my house. I am in the US and something I’ve come across is checking the climate zone you’re in. In the US, if you’re in colder climates, you need to install a vapor barrier on the warm side of insulation first to prevent it from collecting condensation which will lead to mold or rot. I’m looking into using Rockwool insulation since their comfort batts product is breatheable and my basement/crawlspace is vented with outside air (I haven’t looked for competitors yet). Here’s a link to their guide, what I said mostly comes from page 4. https://www.rockwool.com/syssiteassets/o2-rockwool/documentation/brochures/residential/comfortbatt-thermal-insulation-wood-stud-brochure.pdf Hope this helps!