mike9 said:
The reason I went with that size plinth block is because the original moulding in the house had the same height plinth block.
It's easy to repeat errors of others in the name of efficiency and expediency, we have all done it.
I agree with others, that there are a lot of things just plain wrong with your initial solution.
Since you asked, here are my comments. These are straight from
Get Your Youse Right. Get the book. It really helps with stuff like this.
1) the plinth block is too high and should at least terminate at the top of the base board.
2) If the rest of the house has a Georgian or Colonial style base and casing either stick with it or introduce a complimentary style. Your first example is neither modern nor (neo) classical. Pick a style and make your room work with in that convention. (This is also a mistake I have made)
2) the base board may be too high based on your ceilings. For an 8' ceiling a good height for the base board is +/- 5 1/2"
3) Use a shoe mold instead of a quarter round. I really detest the look of 1/4 round but it is appropriate in some instances.
4) Use a shoe mold that projects into the room less than the height.
Tim