Product Comparisons
Sliding Sash vs Casement Windows
The short answer
Match what the house was built with. Georgian and Victorian houses were usually built with sliding sashes; cottages and many farmhouses with casements. Swapping one for the other changes the character and may need permission in protected settings.
Windows in the Dales editorial team · Published 25 September 2026 · Reviewed 25 September 2026 · Next review March 2027
Key takeaways
- Match the original
- Changing type is a visible change
Sashes slide vertically; casements hinge. Both can be made with modern performance.
When it may not
- Casements replacing sashes on protected frontages