Inspecting Frames and Glass at Delivery Before You Sign

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Inspect windows on delivery by checking each frame against the approved drawing, looking closely at the glass and seals, and testing the hardware before you sign the delivery note. Note any defect in writing and photograph it while the installer is still on site, because problems are much easier to resolve at that moment.

Why Inspect Before Signing the Delivery Note

Once the delivery note is signed and the installer leaves, it becomes harder to prove that a scratch, a wrong size or a missing part was there when the goods arrived. A short inspection at the door protects you and speeds up any correction. Plan for it, and give yourself enough time, because a rushed check often misses small issues.

Keep the approved drawing and written specification beside you. Every frame should match the sizes, opening directions and configurations agreed before production.

Checking Frames and Profiles

Start with the frames. Look along each profile for straightness, twist and corner alignment. Check that the corners are neatly joined with no visible gaps and that the surface finish is even, without dents, deep scratches or areas where the coating looks thin.

Confirm each unit's dimensions against the drawing
Check diagonals on rectangular frames for square
Look for paint or powder coat damage at transport contact points

Small surface marks may be repairable on site, but structural bends should be reported at once.

Inspecting the Glass

Glass is where many transport defects appear. Hold a light or use daylight and look across each pane at a slight angle to reveal scratches, chips on the edges and any bubbles or distortion. Check the sealed units for condensation or fogging between the panes, which can signal a failed seal.

Look at the glass labels and confirm the type and thickness match the order. Remove protective film only after inspection so you can see the surface clearly.

Checking Seals, Gaskets and Hardware

Run your hand along the gaskets and check that they sit evenly in their channels without tears or gaps. Open and close each window and door several times. The movement should be smooth, the handle should operate without catching, and the locking points should engage properly.

Test hinges, stays and multipoint locks where fitted. Note anything stiff, loose or missing so it can be addressed before installation begins.

Verifying Quantities and Documentation

Count every unit and compare it with the delivery note and the order. Check that accessories such as handles, screws, glazing beads and sill pieces are included. Make sure every item is labelled clearly so it can be matched to its opening on the plan.

Keep a copy of the signed note with any remarks written on it, and take dated photographs of anything you have noted.

What to Do If You Find a Problem

If you find a defect, write it on the delivery note before signing. Describe it simply, for example "scratch on left frame, 20 cm, glass chipped at lower corner". Photograph the item from two angles with the unit number visible. Ask the installer or the factory how the issue will be resolved and when.

You do not have to accept goods that clearly do not match the approved specification, so it is reasonable to refuse those units until the matter is settled.

Frequently asked questions

Should I inspect windows on delivery even if the installer is in a hurry?

Yes. A few minutes at the door can prevent weeks of disputes. Ask the installer to wait while you check, and note any issues before signing.

Can I refuse a window that has a small scratch?

Minor surface marks are often repairable and may be acceptable. Record them on the note, and discuss the repair method before deciding whether to accept the unit.

How do I spot a failed sealed glass unit?

Look for condensation, fogging or moisture between the panes, especially when light hits the glass at an angle. Any visible moisture inside the unit should be reported straight away.

What should I bring to the delivery check?

Bring the approved drawing, the written specification, your order list, a phone for photos and a pen. Having the plan on hand makes it easy to match each unit to its opening.

Common mistakes to avoid

Signing the delivery note before checking each unit is the most common error, as it makes later claims difficult to prove. Another is testing only the glass and ignoring the hardware, which often shows problems only once the window is in use.

Our recommendation

Check one unit completely from frame to hardware before moving to the next, and mark each one as you finish it. Photograph every defect with the unit number visible, and write remarks on the delivery note while the installer is still there.

Summary

Inspect every frame, pane, seal and handle against the approved drawing, record any issue in writing, and photograph it before signing. A careful check at delivery saves time, cost and disagreement later.

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