High Urgency
Impact Crack in Window: Assessment, Safety & Repair Options
Impact cracks from rocks, hail, or other objects compromise window security and insulation. Virginia Glass Windows provides fast assessment and repair throughout DC, MD & VA.
4
Warning Signs
5
Known Causes
4
Solution Steps
Free
Professional Assessment
Common Symptoms
Spider-web or starburst crack pattern radiating from a center impact point
Visible chip or hole at the impact center
Crack lines extending to the glass edges
Draft or air infiltration through the crack
What Causes This
Thrown or launched projectile such as a rock, baseball, or hail stone
Lawnmower or power equipment ejecting debris toward windows
Wind-blown debris during DMV storm events
Birds or animals striking the glass
Adjacent construction work producing airborne debris
How to Fix It
Solution Steps
1Assess the damage — single pane or double pane, size of the crack pattern, whether glass is stable
2Apply clear packing tape over a single-pane crack temporarily if glass is still stable
3Do not attempt to use windows with compromised glass in terms of security
4Call for professional measurement and replacement
When to Call a Professional
All impact cracks in double-pane windows require IGU replacement
Any crack that compromises the security of a ground-floor or accessible window
Impact cracks in laminated or tempered specialty glass
Stay Ahead
Prevention Tips
Install impact-resistant laminated glass in windows adjacent to driveways, play areas, or parking lots
Apply safety window film as a secondary protection layer
Redirect HVAC equipment, lawn mowers, and power tools away from windows during use
Common Questions
FAQs About This Problem
Yes — the IGU seal is breached and the insulating gas escapes immediately. The window loses its energy performance and may allow water infiltration. Schedule replacement promptly, ideally within 1 to 2 days.
Similar Issues
Related Problems
Explore More Resources
Commercial GlassStorefronts, offices, partitions, 24-hour board-upShower Glass & DoorsFrameless, semi-frameless and framed enclosuresResidential GlassWindow, patio door and foggy insulated glass repairFree Glass ToolsConfigurators, cost estimators and code checkers
Related Articles
Related Pages
Our Services
Need Help With This Problem?
Upload a photo and get a professional assessment for free. Same-day service across the DMV.
Licensed & insured in DC, MD & VA. Satisfaction guaranteed.