The above photo is with primer only but it's actually painted white. For some reason I don't have a photo of the whole house after paint I guess, but here's a partial pic:

So for the bump out above the garage, we were supposed to have something similar but I realized they had done this instead (again, not painted yet):

I'm just not sure I like it as it feels so much different from the front. Our builder said it's because the dentals could only go against the house and not around the edge of the bumpout. But I'm thinking if there was another piece of trim under there the dentals could be attached to it and then go around the edge. Am I really off base here? I couldn't find pics of dentals on a bump out to show my builder, but just these with a partial overhang (and our plans which show that we wanted dentals on the bumpout:

So he says we'll meet to discuss the dentals further. I want to be armed with info supporting my cause. Any opinions on the matter?? Would another piece of white wood under the bumpout with dentals on it work out? Has anyone seen pics of something like this?

Thanks for any input :)
Shannon

Here's what I would suggest. First, cut a piece of 1x6 the length of your bumpout minus about 6 to 8 inches. Then cut two more pieces of 1x6 the length of those four support braces minus however much "dentil molding" you want showing and minus the thickness of a piece of 1x6.

Now, cut four notches along one edge of the long piece of 1x6 so that the four support braces will fit INTO the notches. Put the three boards together like so:

Attach this structure to the bottom of the bumpout and tight against the house so that just the ends of the support braces stick out. Small L-brackets attached to the "inside" edges of the boards ahead of time will make it easier to attach the structure to the bottom of the bumpout. (Sorry but my drawing skills on PAINT aren't good enough to show the L-brackets but it should be obvious where they will need to go.)

Now, cut a piece of the material that was used on your porch ceiling so that it will fit INSIDE the structure. Attach this to the the bottoms of the supports so that they are hidden except for the parts that stick out thru the notches.

Now, the only portions of the supports that you'll be able to see will be the ends and, once everything is painted white, they should look like the dentils you have on the front of the house.

Because the entire structure is tucked UNDER the bumpout by 3 to 4 inches on all sides, all of the screw/nail holes will be protected from weather. Thus no flashing should be needed. Just caulk good where the structure butts up against the bottom of the bumpout and around the notches...mostly to keep bugs from crawing inside and using the hollow spaces as places to nest.

If you house is sided with Hardie, they should be able to do this with 1x5 Hardie trim boards instead of 1x6 wood although cutting the notches without splitting the fiber-cement will take a sharp saw and somebody with a little bit of real skill in working with Hardie.

Good luck.