I have a couple of bay windows that bump out from the foundation of my house. The floor of these windows was noticeably colder in winter. I made a project early on of spraying a lot of Great Stuff between the floor joists under one of the windows. I used quite a few cans of Great Stuff and it was a real pain to reach around with those little cans to get the foam everywhere. However, it made a huge difference - the floor is much warmer now. The remaining bay window bumps out significantly further from the foundation, in fact I cannot reach the end of it from the basement. It seems to me I need a more professional setup for foaming this space. I've looked around a bit. I've found a few professional spray guns for Great Stuff Pro and similar products, but since these products are aimed at pros, there is little information out there to guide me to the right setup. So, I'm wondering if anyone here has dealt with a similar issue?