Window and door trim or fascia board pulls away from exterior walls. step cracks have appeared in exterior brick or stone work. step cracks occur in a stairstep pattern in mortar joints, often with large gaps and separation. stone, brick or siding has pulled away from exterior doors and/or windows, leaving gaps.. Window frames pulling away from wall most of the articles i've found addressed sealing them from the outside of the home. but i need to do it from the inside because the actual wooden frames have pulled away from the wall (sheetrock) over the years.. Choose whether to install the rod on the casing or the wall outside the casing. installing in the casing will always leave at least part of the window obscured, while installing outside the casing allows you to pull the curtains back completely..