Lots of factors when considering signal strengh of wifi. Normally, from basement to first floor, it's not that bad and you will get a signal strong enough for connections. However many things will reduce that signal like the following, but not limited to:
- Is the router in the middle of the basement or on the edge of a wall, so going from one side of the house to the other, you'll lose more signal because it's going in a straight line, so even if there is only 1 foot between floors, the signal is travelling through way more "floor" because of the straight line path.
- Is the main beam of your house a Steel I beam? or is it wood? In my house, i lose more signal because I have a steel girder as my main support.
- how much ventilation between (metal in general) between the router and device.
- Lots of walls/rooms/etc between?
- Electrical devices?
- many other factors that you just can't really list in a single post.
mainly, your best bet is to try it out and see if you get good signal. If not, there are many options available to you. One being to create a second wifi access point, or even use a signal booster to achieve better signal upstairs. Another option to you which is slightly newer is to use a Powerline network, where you can use your existing electrical outlets as access points to your network. It's a slightly more costly solution, but seems to work decent based on other people's reviews.
I personally use 2 routers to get better signal. plug 1 into the other, and boom, 2 access points on the east and west of my house. It's a solution that works for me, in my situation.
