Havering sits on the London-Essex border, with properties ranging from Victorian terraces to post-war estates and newer builds, each with different window types and compliance histories. An inspection covers the full picture: frame condition, sealed unit integrity, trickle vent presence, hinge and lock operation, and weatherseal continuity. Misting, draughts, and sticking sashes are traced to their source rather than treated as a reason to replace everything.
Compliance is a separate but equally important check. The London Borough of Havering building control requires either a FENSA certificate or a local authority completion certificate for replacement windows. An inspection identifies whether that paperwork exists, whether it matches the windows currently fitted, and whether any installation falls short of Approved Document L thermal performance requirements.
The inspection is useful at three points: when symptoms appear and you want to understand the cause; before a property transaction where window condition affects value or mortgage; and after installation where the paperwork is unclear or missing. The installer produces a written report setting out findings and, where faults exist, the repair or replacement options available.