Baseboard will look strange here. I was the one who suggested you make a block for this area. But here is another idea that will look very good. You could use some full profile door casing. By full profile, I mean the kind of case that's used with corner blocks because it is a full 3/4" on both sides----not tapered. Some of it has flutes or beading that would look nice and some of it is 5" wide. I would use something wider than your baseboard. Here is something else for you to look at----it might give you some good ideas. This website is one I found a while back for corbels, but they also have some neat wood panels that you might find useful. It's under "new products" on their site. www.osbornewood.com

They cut-short the nosing, usualy instead of the cut back that they did, the nosing would have "ear" cut to overlap the wall, here is an example. This can be easily fixed by an experienced finish carpenter or or a contractor using matching trim. I wouldn't calk it would create more of a mess and it will not look good. If you don't care much about the look, you can use none-shrink compounds, filling the voids sanding and painting, but using trim it would apear more finished and it will look much better. Good luck

OMG their workmanship is terrible. Obviously you didn't have a permit, because no City would have approved this job. You need to cut your losses and have this redone by a professional tile person. You should NOT under any circumstances be giving them advise on how to fix this. You will be giving them an out, because all they need to say is "She told us how to do this and we were just following what SHE wanted. SHE knew we weren't tile professionals. What you are seeing is just the tip of the ice berg of problems. I agree that probably the drainage of the floor is probably also wrong. Did they also do the Plumbing as well? In the future, you will undoubtedly be faced with major water damage to your home. If any damages occur down the road, it may be difficult to get your insurance company to pay for repairs once they see how this was done. These people need to return your money and the cost of your tile so you can redo the shower. For goodness sake don't let them work on any thing else in your house. If you need references, I would go to a large reputable tile store and ask them for people they know and trust. Be sure to check that their license. You can do this by checking their license no. with your State's Contractor's Board. Best of Luck to you.

You will probably have difficulty getting to the wall under the baseboard heater, and if insects are in the wall already they'll find another place to come in. So in addition to what was suggested, go outside and make sure that the soil/groundcover is 8" (min 4") below where the wood framing starts. That can reduce a lot of insects and if moisture is being held too high by groundcover. Then, spray a repellant around the house perimeter once or twice a year per directions.