Window repair: faults, solutions and costs
A useful repair starts with the problem you observe. Learn which solutions may suit, what details help and how to compare labour, travel and replacement parts.
Plan repairs around the actual fault
A sticking sash, broken handle, draught and damaged pane are different repairs. Describe what you observe. You do not need to know a fitting’s technical name or diagnose the cause yourself.
Repair may involve adjustment, individual replacement parts, seals, glazing or frame work. Preventive window maintenance without a particular fault is a different service, as is complete replacement with new windows.
Count affected complete units and indicate differing problems together. An individual pane or sash is not necessarily a separate window. Several suitable repairs can then be planned around the same visit.
Sticking windows, handles and fittings: describe what happens
A sash may rub the frame, resist locking or fail to reach the intended position. Cause and solution depend on alignment, locking, fixings and part condition. Adjustment does not automatically solve every faulty fitting.
Known manufacturer, model or fitting details help prepare compatible parts. Available labels or documents may be useful. Do not open an unstable or damaged window further simply to look for identification.
State whether the window can still close safely. A loose or detached sash and sharp glass need different urgency from a slightly stiff handle. Avoid force and have unsafe units professionally secured; comparing quotes does not replace immediately necessary securing work.
Distinguish draughts, rain entry and condensation
Draughts can relate to seals, closing pressure, distorted components or the wall junction. An arbitrary extra seal is therefore not a general solution. Profile, position and function need to suit the existing system.
For water, describe the location and circumstances: on the frame during rain, on the indoor surface, outside or between panes. These observations have different meanings. Condensation on the exterior glass surface does not automatically establish failure of the insulating unit.
Moisture inside a sealed glazing unit cannot be wiped away like surface water. The unit needs professional assessment. Indoor surface moisture also requires consideration of temperature, ventilation and indoor humidity; a repair alone does not remove every cause.
| Observation | What needs assessment |
|---|---|
| Sash sticks or will not lock | Alignment, handle, fittings and fixings. |
| Draught with the window closed | Seals, pressure, frame and wall junction. |
| Water during rain | Drainage and exposed junctions. |
| Moisture between panes | Condition of the sealed insulating unit. |
| Moisture inside or outside | Exact surface and building conditions. |
Replace glazing without automatically replacing the window
A broken or unsuitable pane may be addressed by replacing the glazing unit if frame and fittings remain suitable. Glass build-up, dimensions, weight and support need checking. The contractor takes or confirms final ordering measurements.
Thicker or differently specified glazing is not automatically compatible with an existing sash. Thermal performance, acoustics and safety need to suit the unit and its position. Full-height or fall-protection-related units need particular consideration.
Temporary securing and final repair are different services. Agree on their separate scope and cost if two visits are required. Do not remove dangerous glazing yourself or continue using an unsafe area.
Assess frame condition, historic parts and old materials
Local timber damage, loose joints or damaged finishes involve different work from a faulty handle. Extent, sound material and suitable replacement parts matter. Not every old component needs replacing, but not every frame can sensibly be retained.
Historic window profiles, divisions and fittings may merit preservation. A coordinated repair or restoration should therefore be considered before replacement. Local protection requirements and necessary consent depend on the actual building.
Material assessment may be needed before disturbing older putties, coatings or junctions. Old window putties can contain asbestos. Appearance or an assumed construction date is not enough for reliable assessment.
Compare repair prices including travel and parts
Regional examples around Basel offer adjustment from CHF 100 per sash and seal replacement from CHF 120 per window, with materials, VAT and travel up to 20 km included. These are limited starting tariffs, rather than a Swiss average.
Fitting replacement, frame repair and glazing replacement have different costs. Number and type of faults, part availability, dimensions, access and visits affect the total. A cheap initial visit is not a complete price if parts and another journey are added later.
Have assessment, labour, parts, travel and any surcharges specified. Ask what the first visit includes and how extra work will be authorised. Compare repair against replacement using the same desired function and complete costs.
| Cost item | For a clear comparison |
|---|---|
| Assessment | Examination and quote included or separate. |
| Labour | Fixed price or time rate with minimum charge. |
| Parts | Compatible components, glazing and adjustments. |
| Visits | Service area, surcharges and possible return journey. |
| Access and securing | Lifting equipment and temporary measures where needed. |
| Total | Disposal, VAT and excluded work. |
Prepare the repair and check operation together
Clear the agreed work area and access. Known model details and documents can help parts assessment. The initial enquiry does not require a technical drawing or compulsory photograph.
If pricing depends on an initial assessment, agree on that visit’s cost and the next steps first. Uncertain part availability or additional damage should not be presented as an already confirmed repair.
After completion, check the agreed functions with the specialist: opening, closing, locking and any renewed seal. Ask about appropriate care and use. Record completed work, remaining points and installed parts.
- Describe the fault. Affected units and observed problems.
- Agree on solution and cost. Assessment, parts and complete scope.
- Coordinate repair. Access, parts and any securing work.
- Check operation. Result and care instructions.
Frequently asked questions
Do I need to name the faulty fitting?
No. Describe what does not work. Model or manufacturer details help if available, but can remain unknown.
Does broken glass require a new window?
Not automatically. A suitable glazing unit may be enough if the frame, weight, support and required performance are compatible. The contractor checks this.
Do misted windows always have a fault?
No. Water indoors, outdoors and between panes has different causes. Describe its location without having to diagnose it.
Can I request several repairs together?
Yes. State the number of units and select the relevant faults. Differences can be added together in the optional note.
Is a second visit automatically included?
That depends on the quote. Clarify assessment, parts delivery, further visits and surcharges before commissioning.
What should I do about an unstable sash or sharp broken glass?
Stop using the unsafe unit and have it professionally secured. An ordinary quote comparison does not replace immediately necessary securing work.
