How To Fill Outside Wall Cracks. Cracking in your walls could be due to settlement in a particular area, or it could be due to soil erosion under the foundation. I am rubbish at diy now your hair line cracks, as they stand, they are to fine to fill, these type of cracks require raking out, widening and much better suited for a flexible fill.
Then spray on two or use exterior textured wall emulsion paint to paint your cracked drywall.
I am not sure how to fill the gap in. There is no need to panic, however, as only a small amount of cracks are symptomatic of a more serious underlying structural problem. Looking on the internet do i just use cement and fill it in or use a expansion joint filler or caulk. Fill the gap with plenty if the tape is coming off completely, cut it off squarely just outside the damaged area and pull the loose.