This is not to write in any deep detail but share the setup. Ready?
Use a BRIDGE and wire the bridge to the WAN port of the wifi router. Setup is not going to be written up by me. You have a second option of using the bridge and wifi router combo in another mode if you read about post 18 in this forum's sticky.
The BRIDGE unit would be in the window or outside. The wifi router would be inside the building.
For me this would be under 1/2 an hour to setup.
I have dsl with a wireless router in my home. I have an out building 400-500 feet away. The outbuilding is wood construction but the foam board insulation has a foil backing and the roof is metal. I can get one bar on the laptop if I set it in the window. I want stronger reception in the building. I can buy a range extender but I am worried that due to the building construction, I may recieve signal better but I wont be able to transmit back to the house from the laptop while inside the building.
Is there an antenna I can put on the house connected to my current router by cable and another on the outbuilding with another wireless modem inside the shop connected to the antenna. Cost effective ideas would be much appreciated.