Are diagonal cracks above doors and windows serious? They can be. Diagonal cracks often indicate movement around an opening and should be evaluated. By admin|2026-03-26T14:04:38-04:00March 26, 2026|drywall cracks|Comments Off on Are diagonal cracks above doors and windows serious? Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail About the Author: admin