Do sash windows open top and bottom?
Yes, traditional double-hung sash windows open from both the top and the bottom, because both sashes slide in their own channels. Single-hung sashes only open at the bottom, as the top sash is fixed. Opening both lets warm air leave at the top while cooler air enters below.
How does the top-and-bottom opening work?
Counterbalance weights, or spring balances on modern versions, hold each sash at any height. You can lower the top sash and raise the bottom one together.
Why would you open the top sash?
Warm, stale air rises, so opening the top sash vents it away. It also gives airflow without leaving a low opening, which suits rooms with children or pets.
Are all sash windows double-hung?
No. Some are single-hung, with a fixed upper sash, and some period homes have been fitted with sashes that were painted shut. Check by trying both sashes and looking at the meeting rail.
Can new sash windows open both ways?
Yes. New timber box sashes can be made double-hung with modern balances and draught seals. Jake surveys each opening himself to match the original style. See our sliding sash windows.
Thinking about new windows? Jake surveys every job himself, and our quotes are free, in writing and without obligation. We fit across Oxford, Kidlington, Bicester, Witney, Abingdon and the villages around. Call 01865 708464 or ask for a free quote.
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