I am having some contractors build a window well for an egress window at my house. I have the option of doing solid concrete walls for the window well, or cement blocks (which he said he will fill with cement anyways). The concrete walls are significantly more expensive (about 1k more) so I am thinking of just going with concrete blocks, but are there significant reasons why I should choose the concrete walls instead and suck up the extra cost?
Also, do people typically put some type of drainage system in the bottom of the egress window well (sump pump or otherwise)? Is it necessary?