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Fenestration Hardware Specialists

Fax: +44(0)24 7643 7969

+44(0)24 7643 7900

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Company History

For more than 120 years Caldwell has been supplying quality hardware for window manufacturing. In this time we’ve introduced a number of industry firsts such as the first moving coil constant force balance, first co-located casement window operator and lock, and first heavy duty spiral balance.

Caldwell has also expanded into international markets to become a world leading specialist window hardware manufacturer, with over 1 billion balances sold so far.

Caldwell hardware production facility

Industry innovations

Founded in 1888 by Allen Boucher and William Caldwell, Caldwell Hardware supplied clock spring counterbalances for window construction throughout Northeast America.

In 1948 we developed the first spiral balance – Spirex – catapulting Caldwell to the top of the window hardware market.

The 1950s saw the introduction of breakthrough new products, weatherstrip balances Spiraflex and Rib-Tite.

During the late 70s Caldwell developed Trim-Tilt for wood and Aluma-Tilt for aluminium to allow hung windows to tilt to the inside for safe and easy cleaning.

In 1991 we launched ULTRA-LIFT balances, our first hybrid balance designed to balance large and heavy windows.

Ultra-Lift spring balances

Expansion into the UK market

In 1973 Caldwell embarked on a joint venture with an English window manufacturer to supply products to the UK and European markets. Caldwell eventually bought out the partners and established Caldwell Hardware United Kingdom.

2014 saw the acquisition of leading international friction hinge manufacturer Cotswold Architectural Products. This was a strategic move for both Caldwell and Cotswold by bringing together two of the most respected names in the window and door hardware markets.

Quality window hardware from the experts

Today Caldwell UK is one of the leading designers and manufacturers of specialist window hardware for the fenestration industry. But we haven’t forgotten our roots; in every generation there has been a Boucher building balances for single and double hung windows since the beginning of Caldwell.

To find out more about the quality products we offer and how these can benefit your product range and meet even the most discerning project requirements, give us a call today.

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