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Timber window advice

Should You Paint or Replace Old Timber Windows?

Old timber windows can often be restored and repainted when the frame and sash remain sound. Replacement or specialist joinery work is more appropriate when rot is deep or widespread, joints have failed, or structural sections no longer operate safely.

A useful decision starts with the timber itself, not the appearance of the topcoat. Victorian, Edwardian and mid-century homes around Yarraville, Kingsville and Williamstown can have peeling paint while retaining repairable timber underneath — or sound-looking coatings that conceal deterioration at sills and bottom rails.

Assess the window before choosing

  • Surface paint degradation: chalking, flaking or cracking that has not progressed into deep timber decay.
  • Putty and glazing: loose, cracked or missing putty and whether glass is securely held.
  • Bottom rails and sills: softness, open end grain, failed joints and weathering where water tends to sit.
  • Operation and structure: whether sashes move safely, joints remain firm and frames are not severely distorted.

When restoration and repainting may be viable

Expose sound edges

Remove loose coating carefully and feather firmly bonded paint without unnecessarily damaging sound timber.

Assess after preparation

Probe suspect weathered areas and decide whether localised repair is appropriate or a carpenter should inspect deeper damage.

Stabilise and repair

Where suitable, use a compatible timber stabiliser or primer and a two-part timber filler for limited defects, following the product system.

Prime and undercoat

Prime bare timber, end grain and repaired areas, then use the appropriate undercoat before finish coats.

Apply the selected finish

Use a compatible exterior enamel or acrylic system, taking care around sash contact points, drainage paths and glazing.

Warning signs repainting alone is not enough

  • A screwdriver or probe enters deeply into soft timber rather than finding a firm base.
  • Rot extends through joints, sash rails, sill sections or load-bearing parts of the frame.
  • Window components are loose, significantly distorted or unsafe to operate.
  • Water entry continues because flashing, drainage, glazing or adjacent building work has failed.

When to involve a carpenter or window specialist

Significant rot, failed joinery and unsafe operation are not solved by filler and paint. A carpenter or timber-window specialist should repair or replace affected components before the coating work proceeds.

For pre-1970 homes, previously painted timber may contain lead-based paint. Baku Painting is not a lead abatement contractor. Read our Lead Paint Safety guide before disturbing old coatings and engage an appropriately qualified specialist where lead abatement is required.

Related painting advice and services

Frequently asked questions

Can weathered timber windows usually be repainted?
Often, yes, when the timber remains fundamentally sound and deterioration is limited to the coating, putty or localised shallow defects. The window must be assessed after loose paint is removed because coatings can conceal the true condition.
What signs suggest a timber window needs a carpenter or specialist?
Deep or widespread rot, soft structural sections, failed joints, major distortion, loose components or a sash that cannot operate safely require assessment by a carpenter or window specialist before painting.
Why do bottom rails and window sills deteriorate first?
They receive and hold more rain, condensation and ultraviolet exposure than protected sections. Open joints, failed putty and unsealed end grain can let moisture enter, so these areas need particularly careful inspection and preparation.
Could old timber-window paint contain lead?
Previously painted surfaces in pre-1970 homes may contain lead-based paint, but age alone does not confirm it. Testing and lead-safe controls are important before disturbance. Baku Painting is not a lead abatement contractor; see our Lead Paint Safety guide and use an appropriately qualified specialist where abatement is required.

Where we paint & what we do

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0434 850 347

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