This satellite dish antenna mounting block can be used with most J-mount brackets to provide a nice, tight, secure, professional mounting surface on a vinyl or aluminum siding.
There are 3 styles available.  This block fits double 1/2" or 5/8" Lap 5" Siding.  The outside dimensions are 12" tall x 8" wide.

Fits Double 1/2" or 5/8" Lap 5" Siding

Creates a 12" tall x 8" wide mounting surface

These blocks can be painted to match the siding, or you can just use the standard white.  There are several ways to use these blocks, however when we use them, we drill holes through the blocks where the lag bolts will go through the j-mount, then we just use longer lags to bolt the j-mount and block to the building at the same time, however you can also bolt the block to the home, then bolt the j-mount to the block if necessary!