Inspecting Your New Windows: What to Check Before Signing Off

Before making final payment, take time to inspect the completed work. According to FGIA, a systematic inspection catches issues while the crew is still on-site and corrections are easy.

Visual Inspection

According to AAMA and FGIA quality standards:

From Inside

Glass:

• Clean and free of scratches
• No broken seals (fog or moisture between panes)
• Correct glass type (clear, frosted, Low-E)
• Proper orientation (Low-E coatings positioned correctly)

Frame/Sash:

• No visible damage (dents, scratches)
• Correct color as specified
• Square and level appearance
• Consistent gaps around sashes

Interior Trim:

• Clean installation, properly fitted
• Consistent reveals (gaps between trim and frame)
• Caulk lines clean and even
• No exposed fasteners (unless appropriate)

From Outside

Exterior:

• Flashing visible and properly lapped (water shed correctly)
• Caulk lines complete and neat
• Siding/trim interface clean
• No gaps or exposed materials

Overall:

• Windows align with each other
• Consistent appearance across installation
• Debris cleaned up

Operation Testing

According to FGIA, test every window:

For All Windows

• Opens smoothly without sticking
• Closes completely and seals
• Locks engage properly
• Stays open when positioned (doesn't fall)
• No rattling or loose components

By Window Type

Double-hung:

• Both sashes operate smoothly
• Balance system holds sash at any position
• Tilt-in feature works (if equipped)

Casement:

• Crank operates smoothly throughout range
• Window seals tightly when closed
• No binding or grinding

Sliding:

• Panel glides smoothly
• Locks at fully open and closed
• Meets security and egress requirements

Seal and Insulation Check

According to AAMA installation standards:

From inside (with door closed):

• Hold lit candle/incense near edges
• Watch for flame flicker indicating air leaks
• Check especially at corners and where different materials meet

Foam and caulk:

• Gaps should be filled
• No daylight visible around frame
• Foam not over-expanded (causing frame bow)

Documentation

According to FGIA guidance, before crew leaves:

Collect:

• Manufacturer warranty documents
• Care and maintenance instructions
• NFRC labels (photograph if they'll be removed)
• Emergency contact information
• Final paid invoice

Verify:

• Correct number of windows installed
• Windows match contract specifications
• All agreed-upon work completed

Addressing Issues

According to industry practice:

Minor issues (fix now):

• Dirty glass
• Loose trim
• Missing caulk
• Adjustment needed for operation

Major issues (document, don't sign completion):

• Damaged glass
• Wrong windows installed
• Significant operation problems
• Visible installation defects

The Punch List

According to AAMA guidance:

Walk through with installer and create written list of:

• Items needing attention
• Agreed-upon resolution
• Timeline for corrections
• When final payment will be released

The Bottom Line

Take 15-30 minutes to systematically inspect before the crew leaves. According to FGIA, issues caught immediately are easily corrected; issues discovered weeks later become disputes. You're paying for quality work—verify you received it.

*For complete installation guidance, see: [Window Installation Process](/guides/window-installation-process)*