What window cleaning can change
Removing ordinary dirt from compatible glass may improve visibility and the amount of light passing through the surface. The effect varies with the glass, soil and surrounding conditions; it is not a measured energy-efficiency upgrade or a promise of reduced heating or cooling costs.
What determines window performance
Glazing type, coatings, frame condition, weather seals, installation and ventilation all affect heat transfer and drafts. Cleaning cannot replace damaged seals, fix condensation between panes, repair frames or change a product's rated performance.
Choose a compatible cleaning method
Check the glass and frame care instructions, especially for tinted, coated, heritage or damaged surfaces. Use a compatible product and safe access method; high or awkward exterior windows may need a qualified window-cleaning provider with suitable equipment.
When to seek maintenance advice
Persistent drafts, condensation between panes, damaged seals or broken glass are maintenance issues rather than dirt. Document the concern and contact the property manager, window maker or an appropriate building professional. Ask a cleaner only for the agreed cleaning scope.
