Topband: Rx antenna suggestions ?

[Plasticos Omega]

Hi,
Actauly I am using a coax loop Rx antenna but I am looking for info abt an Rx antenna that could be installed in my house´s roof, that could give me a better performance.

My roof is completely flat, aprox 26 ft x 30 ft, have no chance to put either a tower or mast, so the solution must be something that runs parallel to the surface.

In my lot have no chance for Beverages.

Thanks for your time,

Javier
yv5mbx