Timber Rot Repair for Sash Windows in Edinburgh
Edinburgh’s climate — wet winters, driving rain and persistent damp — is one of the harshest in the UK for timber windows. Timber rot is extremely common in Edinburgh sash windows, particularly where glazing putty has failed and allowed moisture to penetrate. The good news: in most cases, rotted sash window timber can be repaired rather than replaced — at a fraction of the cost.
Where Does Timber Rot Occur in Sash Windows?
- Window sills — constantly exposed to rainwater; the most common site of rot
- Bottom rail of the lower sash — sits in the weather position and collects water
- Glazing bars — if putty fails, water tracks into the timber
- Frame and casing — especially at the base where water can pool
- Joints and corners — where two pieces of timber meet and moisture can penetrate
Repair vs Replace — Why Repair Is Almost Always Better
Many Edinburgh homeowners are told rotted sash windows need full replacement. In most cases this simply isn’t true. Specialist timber repair using consolidant and high-density filler can restore structurally sound, weatherproof timber that will last decades.
- Timber rot repair costs 70–80% less than full window replacement
- Original timber is often superior in quality to modern softwood replacements
- Required for listed buildings and conservation properties in Edinburgh
- Preserves the authentic character and value of your property
Our Timber Rot Repair Process
1. Assessment
We probe and assess the extent of rot to determine whether repair or replacement is the right solution. Over 90% of affected windows can be repaired.
2. Treatment
Affected timber is treated with a specialist wood hardener that consolidates soft, punky wood and kills the fungal spores causing the rot.
3. Repair and Filling
Missing or decayed sections are rebuilt using a high-performance two-part wood filler, shaped to match the original profile exactly.
4. Priming and Protection
All repaired areas are primed with moisture-resistant primer. Adjoining timber is also treated as a preventative measure.
Timber Rot Repair Costs in Edinburgh
- Minor rot repair (small area): £100 – £250
- Moderate rot (sill or bottom rail): £200 – £400
- Extensive rot (multiple components): £400 – £700