My dad installed an iron flowerbox and a flagpole bracket on my brick exterior. He drilled holes insterted wood dowls and then screwed the flowerbox and flagpole bracket into that. The flowerbox has been just fine but I have noticed that one dowl is pulling out. The flagpole does not want to stay in for more than one summer. Every summer I find I have to put in new dowls. How can I attached these to my home in a more secure fashion, keeping in mind the holes for the dowls are fairly large. Thanks.