N300 WiFi Range Extender

I am trying to increase the signal of my Arlo security cameras.  As 2 out of 4 are outside, they have a weak signal and often go offline.  I have the extender connected to my wifi network, and have connected the Arlo base unit directly to the extende via ethernet cable, but the signal to the cameras has not changed.  Can the extender signals pass through the brick of my house?  The front door camera is only 12 feet away from the base unit, but only has two out of three bars.  If I place the camera directly inside the house, all bars light up.  As soon as it passes through the front door, the bars drop down.  Is there anything I can do?