Advertisements We're building a new house and the insulation on the ceiling of the attic has foil. Does this mean we'll need to mount the antenna outside on the roof? We'll go tomorrow to measure the exact angle to most of the transmitters but I think the corner of the house in that direction is the opposite of the point the cable/network/coax enters the house. I didn't think to ask about that when we ordered the new construction. According to antennaweb.org we are antenna class yellow for most of the OTA channels we watch. I'll get a better antenna than that anyways. But it it would work in the attic that's the best choice.