Sash Window Restoration
Complete restoration of original timber sash windows using traditional techniques combined with modern performance upgrades.
Full Restoration Service
Our comprehensive sash window restoration service addresses all aspects of window performance and preservation. We begin by carefully removing the beading and extracting both top and bottom sashes from the frame, allowing full inspection of all components.
We assess the condition of the sill, box frame and external pointing, identifying any areas of timber decay or structural weakness. Sash weights are re-balanced to ensure smooth, effortless operation, and all sashes are renovated with any putty damage repaired using traditional linseed oil putty.
Our Restoration Process
- Removal and careful extraction of top and bottom sashes
- Assessment of sill, box frame and external pointing
- Re-balancing of sash weights for smooth operation
- Renovation of sashes and repair of putty damage
- Replacement of old pulleys with sealed ball bearing pulleys
- Installation of concealed draught proofing system
- Undercoating of all exposed woodwork
- Caulking of beading
- Fitting of new centre catches, sash-lifts and window locks
- Optional full painting service
Timber Splice Repairs
Where timber decay has occurred, we carry out splice repairs using carefully matched timber to replace only the damaged sections. This preserves as much original historic fabric as possible while ensuring structural integrity. We never apply filler over damp or decayed timber, as this traps moisture and accelerates deterioration.
Common Problems We Address
During our surveys and restorations throughout Belfast, we regularly encounter:
- Water ingress through failed putty and deteriorated paint
- Decayed timber components, particularly at joints
- Painted-shut sashes that no longer open
- Rotting sills, especially on south and west-facing elevations
- Severe draughts from worn parting beads and staff beads
- Damaged or cracked glass
- Poor quality historic repairs using inappropriate materials
Listed Building Experience
We have extensive experience working with listed buildings and properties in conservation areas across Belfast and Northern Ireland. Our restoration methods are designed to preserve original historic fabric while improving thermal and acoustic performance, making them fully compliant with heritage requirements and conservation officer approval.
Common Questions
A single sash window restoration typically takes 1-2 days depending on the extent of damage. Most projects involving multiple windows are completed within 1-2 weeks. We work systematically through the property to minimise disruption while maintaining security.
Restoration is typically 40-60% less expensive than full replacement. A standard sash window restoration in Belfast costs significantly less than manufacturing and installing a new like-for-like timber window. We always recommend restoration where it is technically and economically viable.
Yes, painted-shut windows are one of the most common issues we address. We carefully free the sashes without damaging the paint finish or timber, then restore full smooth operation with new parting beads, staff beads and concealed draught proofing.
Our full restoration includes: removing beading and carefully extracting top and bottom sashes, assessing sill, frame and pointing condition, re-balancing sash weights, renovating sashes with putty repairs, replacing pulleys with brass sealed ball bearing pulleys, installing concealed draught proofing, undercoating exposed woodwork, caulking beading, and fitting new catches, lifts and locks.
Yes, we specialise in listed building work throughout Belfast and Northern Ireland. Our restoration methods preserve original historic fabric while improving performance, satisfying conservation officer requirements. We have extensive experience with listed building consent applications.
The most common problems we encounter include: water ingress through failed putty and paint, decayed timber at joints and sills, painted-shut sashes, severe draughts from worn beads, damaged glass, and poor quality historic repairs using inappropriate materials such as filler over decayed timber.
Book Your Survey
Book a free, no-obligation survey to assess your sash windows. We serve Belfast and all of Northern Ireland.
Request Free Survey