Dry-in is a critical construction milestone that marks the point at which a building is fully enclosed and protected from weather. It includes roof completion (sheathed and covered with felt, ice shield, or underlayment), installation of all exterior windows and doors, completion of the exterior wrap or wall system, and gutters and downspouts. Once dry-in is achieved, the interior is protected from rain, snow, and wind.
Dry-in is significant because it protects interior materials from weather damage and triggers the start of interior trades. MEP (mechanical, electrical, plumbing) rough-in can proceed safely once dry-in is complete. Drywall installation and finishing depends on dry conditions. The schedule often accelerates after dry-in because interior work is no longer weather-dependent.
Lenders often recognize dry-in as a milestone draw trigger because it represents substantial progress and protects the project value. Insurance requirements may change at dry-in (the insured value increases because interior materials are now protected). In residential construction, dry-in typically occurs 8-12 weeks into the project and is a key psychological marker of progress for owners.