On February 6, 2018 at 19:49, Brad Humphrey said...
braid, foil/braid, foil/braid/foil.
Assuming these are all RG6 shield constructions you are referring to, the statement that quad shield has lower loss is not completely accurate.
Belden 1694A dual shield solid copper center 6.3dB/100ft @1000MHz
Belden 7915A tri shield solid copper center 6dB/100ft @1000MHz
Belden 7916A Quad shield solid copper center 6dB/100ft @1000MHz
Belden 1189A Quad CCS copper center 6.55dB/100ft @1000MHz