The box beam of my house has a rotten section. It can’t really be accessed from the outside because the problem area is directly at the place where the cement patio attaches to the house. I have had three estimates for repair and one discussion with a few friends. All solutions are different ranging from $600 to $10,000. They are –

1- cut away patio, replace box beam, fix flashing and seal area, replace cement patio with drain added so water does not drain onto box beam and sill plate

2- dig out rotten beam in pieces from interior crawl space, jack up house, slide in replacement beam from side of house (not patio side)

3- dig out rotten pieces, fill with wood bondo pieces (that’s the $600 one)

What is the right way to do it? Is there a ‘right way’ that doesn’t cost $10,000?