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External Joinery

We provide an extensive range of high performance timber windows.

Duffin Joinery Limited use only the highest quality glazing and ironmongery. This technical enhancement helps clients achieve higher building energy ratings for their properties.

Casement Windows

We manufacture a variety of casement windows for both commercial and private customers. 

Our skilled craftsman can produce any shape or design for small and large scale projects.

Sliding Sash Windows

Our high performance sliding sash windows are manufactured in either the traditional weighted system or with spiral balancing.

Technically qualified staff advise on the best options for our clients individual needs.


Our craftsmen can manufacture exact copies or refurbish any existing windows as required. 

We have extensive experience in this field, we have worked on many listed buildings including castles and Georgian houses, we enjoy the challanges this type of work requires and pay particular attention to detail.