As for cracks in drywall, you ought to make use of a scraper to widen the crack and place drywall tape in excess of it. Use a joint or drywall compound and push in the crack. Clean above having a sponge. Then just sand, key, and simply paint it over. https://flood-control.webflow.io/posts/cua-chong-ngap-giai-phap-bao-ve-ngoi-nha-truoc-nguy-co-ngap-lut