Commercial Heritage Window Restoration

Sash Window Specialist –

Commercial Contracts


Sash Window Specialist offer consulting services to architects and building contractors as well as providing a full range of heritage window restoration services.


‘Authentic Replica’ bespoke joinery

Authentic Replica Timber Sash Windows. Douglas Fir. Replica Timber Sash Windows. Fiji Mahogany.
Our Authentic Replica replacement joinery is hand crafted from a range of timbers including Accoya, hardwood or selected softwood. We copy all existing dimensions and fine detail such as horn patterns and glazing bar mouldings ensuring a top quality product compliant with all Heritage Conservation Codes.


Extensive repair service for heritage timber windows

Rotten timber windows before and after. Repaired timber heritage windows.
Our repair service ensures that as much of the existing heritage frame is retained as is practical. All of the rotten timber is cut away and replaced with a timber splice and/or marine grade epoxy resin.  This repair service goes far beyond what can be achieved with two-part polyester wood fillers, that break away in a few years, we provide a permanent fix for many years to come.


Improving energy efficiency & reducing noise

Comfort Hush modern glass in a replica timber sash frame. Weather seals in a timber sash window stop rattles, noise and cold.
Our draught sealing service is the best and least intrusive way of achieving improved performance from old windows. The seals are machined into the timber components to become an integral, practically invisible part of the window. Suitable for all grades of heritage listing’s and conservation areas.

Glazing upgrades with modern high performance glass will insulate us from the heat and cold, keep our offices quieter, protect us from intruders and form a barrier against fires and cyclones



Glazing & putty services

Traditional timber sash glazing methods. Replacement glass with traditional linseed putty in a timber sash.
Replacement glazing and traditional linseed putty pointing.



Safe stripping of lead based paints.

lead based paint removal from old windows. paint stripping timber sash windows.
Stripping of old paint coverings in a compliant manner.


Routine maintenance.

replace broken cords in a timber sash. replace broken glass in timber sash window.
As well as larger projects we also attend to those smaller jobs such as broken cords or smashed glass.



See some of our commercial projects in more detail.


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