How do I check how a window and door installer handles warranty callbacks?

Begin with the paper trail. A well-run installer keeps a record of each callback: the job, the complaint, the cause, who attended and what it cost. If the owner keeps this only in memory or in scattered texts, assume the true volume is higher than described. Ask to read several recent files from start to finish rather than a tidy summary.

Then separate the causes. A leaking window might be a supplier defect, a measuring error or poor sealing by a crew. Each has a different payer, and the answer shows whether the supplier honours its side or whether the installer has been quietly absorbing the cost. Ask how the supplier handles claims and how long they typically take.

Finally, check what the buyer would inherit. Open callbacks, promised free repairs and customers waiting on a visit all become your problem after closing. Speak with a few past customers if the owner allows it, and ask your lawyer how outstanding warranty obligations should be handled in the purchase agreement.

Key takeaways

• Read the full callback files, not a summary the owner prepared.
• Find out whether defects trace to the supplier, the measurements or the crew.
• List every open warranty promise and agree who handles it after closing.
• Ask the supplier how claims are filed and how slowly or quickly they are paid.