[SOLVED] Help very weak signal, concrete house

[scopus]

Hey i live in a 3 story concrete house with router on middle floor. Open big room Downstairs i had ok signal, middle floor good signal, and upper floor bedrooms very weak signal. After recommendation of a friend i purchased a tplink ac 1200mbps range extender and placed in center of middle floor where staircase is. I opted for the range extender because i cant have ethernet cables running through the house. It turned the decent signal downstairs to good but upstairs in bedrooms didnt help at all very weak signal still and often internet doesnt work at all. As upstairs was the main issue tried to fix and range extender didnt help need help. Whats solution?

 

[sizzling]

Powerline adapter with one end WiFi enabled. Will try and find an example.

 

[sizzling]

Something like this https://www.amazon.co.uk/TL-WPA9610KIT-Powerline-Broadband-Configuration-UK/dp/B072QWSCQS/ref=mp_s_a_1_5?ie=UTF8&qid=1549105419&sr=8-5&pi=AC_SX236_SY340_QL65&keywords=powerline+wifi+adapter&dpPl=1&dpID=311NUBE0WuL&ref=plSrch