Misted glass, a draught and water after rain are different observations. Describe each problem separately so the person assessing your windows can investigate the right parts. The age of a window alone cannot tell you what work it needs.
Mist between the panes
Note whether the moisture is on the room-facing glass, outside or apparently within the sealed gap. Mist between the panes can indicate a glass-unit seal problem. Ask a glazing professional to check it; our separate guide explains what to record.
Draughts around the window
Note where you feel air: around an opening section, beneath the sill or elsewhere. Mention whether the window closes and locks normally. The opening seals, fittings or gap around the frame may need checking. Clear glass does not establish the condition of those parts.
Water during or after rain
Photograph the affected area and note when the water arrives. Include nearby staining or damage to finishes. A professional may need to assess the window and surrounding building to establish where the water travels. Avoid adding sealant before the cause has been investigated.
Difficult opening or damaged glass
Describe a stiff handle, a dropped opening section or a window that no longer closes properly. Avoid forcing it. If glass is cracked or loose, keep people away from it and arrange professional help.
Ask for a separate assessment of each problem
Ask the original supplier or a qualified professional to explain the findings and proposed work in writing. A useful proposal identifies the affected openings and what will be repaired or replaced. Ask what is included and who provides any warranty.
For complete window replacement, W4Y starts with photos and approximate measurements for an initial estimate. A final survey follows after you accept it.
Questions
Does an old window automatically need replacing?
Its condition and suitability need to be assessed. A date alone cannot establish whether the glass, frame or fittings have failed.
Should I replace every window if one has a problem?
Have the affected openings assessed and plan the work from the findings. A single fault does not establish that every window needs replacing.
Will replacement glass solve mould around the sill?
Find the source of damp first. Mould on a surface and mist between glass panes are separate observations; one does not prove the cause of the other.
Considering complete replacement after an assessment? Send photos of the affected windows, approximate measurements and your postcode.
