That's what can block your wifi. There is a gadget called an powerline wifi extender which works in such situations to provide a second wifi zone. Let's look for one on amazon but I'll just look for one and you can search for others.
Remember that wifi, no matter what gadget will be blocked by that wall. So put a wifi spot on the other side.
I live in large triplex and so far my wireless go fine except at the end of the house the divide in cinder block and the recption is poor , if none.I like to know if i can get a sort of gadget to improve the recption,and if it's ease to instal.Please any sugestion is appreciated. clueless