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Traditional metal window restoration services

Crittall Windows - Background and History

It is not surprising that most people have heard of crittall windows with over 50 million of these rolled steel windows being produced. Whilst there have been advances along the way the majority of steel windows are quite basic single glazed systems that do require maintenance and can be extremely inefficient with regard to heat loss. Metal or steel windows produced around 1950 and afterwards are likely to be galvanized which did at least tackle the rust problems. However there is no doubt that they are an important architectural feature in many properties, and due to their inherent strength they can and usually do last for a very long time. Tec Glass can restore crittall windows back to near new condition, a service which is often preferable to new replacement windows.

Metal Windows - Replacement or Restoration?

This is probably the most common dilemma when clients call for advice. Whilst we would clearly prefer to restore and recycle existing frames and glazing we can provide new steel replacement windows as well, or even a more modern alternative such as a slim aluminium window. Indeed in the case of a traditional crittall window the cost of a new replacement is often prohibitive, as opposed to the older form of flat metal window (iron or steel). We see our role as a trusted advisor - to understand your needs fully and then explain the different options available and the pros and cons of each, including the relative costs. Unlike most window companies we are agnostic to the solution, we just try to help people make the best [informed] decision possible.

- Remove window from existing frames and temporary glaze or board (optional)

- Separate glazing (usually leaded) from window frame and remove furniture as necessary

- Clean the window frames using either traditional sanding methods or shot/sand blasting

- Fully repair any major defects such as holes, broken sections or distortions

- Restore the glazing, usually leaded lights, to a specification agreed with customer

- Apply Zinc primer to the bare  steel frame for corrosion protection

- Apply hardened paint coating to the frame, usually wet spray and single colour (of choice)

- Clean and check all window furniture and re-attach. If agreed replace any broken or   missing elements, either from our stock or new hand forged replicas

- Fix restored glazing to newly refurbished frame

- Return to site, remove temporary glazing and install new frames and glazing, and touch up.

crittall windows - art deco and suntrap styles

Tec Glass Crittall Window Restoration Process (generic)


crittall frame and brass furniture restored brass window furniture restored traditional window furniture before restoration

Please also see: Leaded Windows | Contact Us Today