Should I get a fixed rate mortgage if I plan to remodel right away?

I am plotting to buy a house with 5-10% down, but I want to remodel the kitchen and bedroom within the next two years. I expect this will add to the value of the house, making my loan-to-value ratio closer to 80/20. Do you reckon I should get a mortgage with an ARM, if it has a better rate, and then refinance once the remodeling is complete? Any…